/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:41:51,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:41:51,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:41:51,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:41:51,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:41:51,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:41:51,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:41:51,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:41:51,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:41:51,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:41:51,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:41:51,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:41:52,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:41:52,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:41:52,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:41:52,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:41:52,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:41:52,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:41:52,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:41:52,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:41:52,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:41:52,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:41:52,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:41:52,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:41:52,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:41:52,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:41:52,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:41:52,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:41:52,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:41:52,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:41:52,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:41:52,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:41:52,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:41:52,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:41:52,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:41:52,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:41:52,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:41:52,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:41:52,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:41:52,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:41:52,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:41:52,056 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 18:41:52,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:41:52,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:41:52,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:41:52,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:41:52,098 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:41:52,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:41:52,098 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:41:52,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:41:52,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:41:52,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:41:52,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:41:52,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:41:52,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:41:52,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:41:52,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:41:52,101 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:41:52,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:41:52,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:41:52,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:41:52,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:41:52,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:41:52,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:41:52,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:41:52,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:41:52,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:41:52,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:41:52,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:41:52,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:41:52,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:41:52,105 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:41:52,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:41:52,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:41:52,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:41:52,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:41:52,413 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:41:52,414 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-18 18:41:52,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8063e5dc1/0e8adbee245d4aeab8a9ae6c0f43e4b6/FLAGf7cea5264 [2020-08-18 18:41:52,960 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:41:52,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-18 18:41:52,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8063e5dc1/0e8adbee245d4aeab8a9ae6c0f43e4b6/FLAGf7cea5264 [2020-08-18 18:41:53,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8063e5dc1/0e8adbee245d4aeab8a9ae6c0f43e4b6 [2020-08-18 18:41:53,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:41:53,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:41:53,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:53,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:41:53,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:41:53,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790958e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53, skipping insertion in model container [2020-08-18 18:41:53,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:41:53,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:41:53,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:53,626 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:41:53,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:53,796 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:41:53,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53 WrapperNode [2020-08-18 18:41:53,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:53,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:41:53,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:41:53,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:41:53,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (1/1) ... [2020-08-18 18:41:53,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:41:53,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:41:53,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:41:53,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:41:53,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (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 18:41:53,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:41:53,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:41:53,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 18:41:53,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:41:53,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:41:53,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 18:41:53,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:41:53,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 18:41:53,949 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 18:41:53,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:41:53,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:41:53,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:41:54,150 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 18:41:54,741 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 18:41:54,741 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 18:41:54,752 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:41:54,753 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:41:54,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:54 BoogieIcfgContainer [2020-08-18 18:41:54,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:41:54,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:41:54,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:41:54,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:41:54,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:41:53" (1/3) ... [2020-08-18 18:41:54,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1588514d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:54, skipping insertion in model container [2020-08-18 18:41:54,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:53" (2/3) ... [2020-08-18 18:41:54,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1588514d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:54, skipping insertion in model container [2020-08-18 18:41:54,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:54" (3/3) ... [2020-08-18 18:41:54,767 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-18 18:41:54,777 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:41:54,785 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:41:54,798 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:41:54,823 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:41:54,823 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:41:54,823 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:41:54,823 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:41:54,823 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:41:54,824 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:41:54,824 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:41:54,824 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:41:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-18 18:41:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 18:41:54,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:54,855 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] [2020-08-18 18:41:54,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-18 18:41:54,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:54,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365566513] [2020-08-18 18:41:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,142 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 18:41:55,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365566513] [2020-08-18 18:41:55,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:55,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:41:55,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640099060] [2020-08-18 18:41:55,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:41:55,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:55,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:41:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:55,174 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-18 18:41:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:55,684 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-18 18:41:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:55,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-18 18:41:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:55,715 INFO L225 Difference]: With dead ends: 375 [2020-08-18 18:41:55,715 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 18:41:55,722 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 18:41:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 18:41:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-18 18:41:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 18:41:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-18 18:41:55,833 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-18 18:41:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:55,835 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-18 18:41:55,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:41:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-18 18:41:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 18:41:55,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:55,839 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] [2020-08-18 18:41:55,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:41:55,839 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-18 18:41:55,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:55,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184434561] [2020-08-18 18:41:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,957 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 18:41:55,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184434561] [2020-08-18 18:41:55,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:55,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:41:55,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868423355] [2020-08-18 18:41:55,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:41:55,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:41:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:55,961 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-18 18:41:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:56,312 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-18 18:41:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:56,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-18 18:41:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:56,321 INFO L225 Difference]: With dead ends: 448 [2020-08-18 18:41:56,321 INFO L226 Difference]: Without dead ends: 260 [2020-08-18 18:41:56,323 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 18:41:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-18 18:41:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-18 18:41:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-18 18:41:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-18 18:41:56,365 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-18 18:41:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:56,365 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-18 18:41:56,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:41:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-18 18:41:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 18:41:56,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:56,369 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] [2020-08-18 18:41:56,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:41:56,371 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-18 18:41:56,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:56,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652111292] [2020-08-18 18:41:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,511 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 18:41:56,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652111292] [2020-08-18 18:41:56,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:56,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:56,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330024888] [2020-08-18 18:41:56,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:56,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:56,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:56,513 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-18 18:41:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:56,543 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-18 18:41:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:56,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-18 18:41:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:56,548 INFO L225 Difference]: With dead ends: 698 [2020-08-18 18:41:56,548 INFO L226 Difference]: Without dead ends: 466 [2020-08-18 18:41:56,550 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 18:41:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-18 18:41:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-18 18:41:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-18 18:41:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-18 18:41:56,583 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-18 18:41:56,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:56,583 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-18 18:41:56,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-18 18:41:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 18:41:56,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:56,585 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 18:41:56,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:41:56,586 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:56,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-18 18:41:56,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:56,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869518698] [2020-08-18 18:41:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,669 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 18:41:56,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869518698] [2020-08-18 18:41:56,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:56,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:41:56,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819347072] [2020-08-18 18:41:56,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:41:56,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:41:56,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:41:56,673 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-18 18:41:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,003 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-18 18:41:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:41:57,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 18:41:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,009 INFO L225 Difference]: With dead ends: 1155 [2020-08-18 18:41:57,009 INFO L226 Difference]: Without dead ends: 655 [2020-08-18 18:41:57,011 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 18:41:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-18 18:41:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-18 18:41:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-18 18:41:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-18 18:41:57,042 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-18 18:41:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,043 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-18 18:41:57,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:41:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-18 18:41:57,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 18:41:57,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,053 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:41:57,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:41:57,054 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-18 18:41:57,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476610] [2020-08-18 18:41:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:57,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476610] [2020-08-18 18:41:57,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525745767] [2020-08-18 18:41:57,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,157 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-18 18:41:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,175 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-18 18:41:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-18 18:41:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,179 INFO L225 Difference]: With dead ends: 1038 [2020-08-18 18:41:57,180 INFO L226 Difference]: Without dead ends: 526 [2020-08-18 18:41:57,181 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 18:41:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-18 18:41:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-18 18:41:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-18 18:41:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-18 18:41:57,203 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-18 18:41:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,203 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-18 18:41:57,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-18 18:41:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 18:41:57,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,205 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] [2020-08-18 18:41:57,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:41:57,206 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-18 18:41:57,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823091555] [2020-08-18 18:41:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:57,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823091555] [2020-08-18 18:41:57,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429613505] [2020-08-18 18:41:57,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,254 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-18 18:41:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,289 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-18 18:41:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 18:41:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,293 INFO L225 Difference]: With dead ends: 1048 [2020-08-18 18:41:57,293 INFO L226 Difference]: Without dead ends: 536 [2020-08-18 18:41:57,295 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 18:41:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-18 18:41:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-18 18:41:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-18 18:41:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-18 18:41:57,316 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-18 18:41:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,316 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-18 18:41:57,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-18 18:41:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 18:41:57,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,318 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:41:57,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:41:57,319 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-18 18:41:57,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323896179] [2020-08-18 18:41:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:57,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323896179] [2020-08-18 18:41:57,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539499008] [2020-08-18 18:41:57,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,374 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-18 18:41:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,611 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-18 18:41:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-18 18:41:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,616 INFO L225 Difference]: With dead ends: 1234 [2020-08-18 18:41:57,616 INFO L226 Difference]: Without dead ends: 670 [2020-08-18 18:41:57,618 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 18:41:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-18 18:41:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-18 18:41:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-18 18:41:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-18 18:41:57,642 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-18 18:41:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,643 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-18 18:41:57,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-18 18:41:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 18:41:57,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,644 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] [2020-08-18 18:41:57,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:41:57,644 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-18 18:41:57,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315699856] [2020-08-18 18:41:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:57,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315699856] [2020-08-18 18:41:57,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212383633] [2020-08-18 18:41:57,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,692 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-18 18:41:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,735 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-18 18:41:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-18 18:41:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,743 INFO L225 Difference]: With dead ends: 1720 [2020-08-18 18:41:57,743 INFO L226 Difference]: Without dead ends: 1149 [2020-08-18 18:41:57,745 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 18:41:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-18 18:41:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-18 18:41:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-18 18:41:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-18 18:41:57,783 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-18 18:41:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,783 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-18 18:41:57,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-18 18:41:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 18:41:57,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,785 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] [2020-08-18 18:41:57,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:41:57,785 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-18 18:41:57,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714712408] [2020-08-18 18:41:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:57,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714712408] [2020-08-18 18:41:57,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678696995] [2020-08-18 18:41:57,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,836 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-18 18:41:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,917 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-18 18:41:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-18 18:41:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,926 INFO L225 Difference]: With dead ends: 2602 [2020-08-18 18:41:57,929 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 18:41:57,931 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 18:41:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 18:41:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-18 18:41:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-18 18:41:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-18 18:41:58,018 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-18 18:41:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:58,018 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-18 18:41:58,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-18 18:41:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 18:41:58,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:58,022 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] [2020-08-18 18:41:58,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:41:58,023 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-18 18:41:58,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:58,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260866768] [2020-08-18 18:41:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:58,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:58,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260866768] [2020-08-18 18:41:58,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:58,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:58,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335546955] [2020-08-18 18:41:58,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:58,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:58,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:58,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:58,074 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-18 18:41:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:58,270 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-18 18:41:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:58,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 18:41:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:58,281 INFO L225 Difference]: With dead ends: 3635 [2020-08-18 18:41:58,281 INFO L226 Difference]: Without dead ends: 1924 [2020-08-18 18:41:58,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:41:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-18 18:41:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-18 18:41:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 18:41:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-18 18:41:58,359 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-18 18:41:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:58,359 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-18 18:41:58,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-18 18:41:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 18:41:58,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:58,361 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:41:58,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:41:58,362 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:58,362 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-18 18:41:58,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:58,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021033740] [2020-08-18 18:41:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:58,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:58,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021033740] [2020-08-18 18:41:58,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:58,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:58,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282867894] [2020-08-18 18:41:58,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:58,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:58,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:58,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:58,437 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-18 18:41:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:58,692 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-18 18:41:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:58,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-18 18:41:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:58,703 INFO L225 Difference]: With dead ends: 3747 [2020-08-18 18:41:58,704 INFO L226 Difference]: Without dead ends: 1933 [2020-08-18 18:41:58,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:41:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-18 18:41:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-18 18:41:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 18:41:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-18 18:41:58,788 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-18 18:41:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:58,789 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-18 18:41:58,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-18 18:41:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 18:41:58,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:58,791 INFO L422 BasicCegarLoop]: trace histogram [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 18:41:58,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:41:58,792 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-18 18:41:58,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:58,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620111659] [2020-08-18 18:41:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:58,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:58,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620111659] [2020-08-18 18:41:58,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:58,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:58,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892895780] [2020-08-18 18:41:58,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:58,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:58,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:58,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:58,868 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-18 18:41:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:59,071 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-18 18:41:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:59,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-18 18:41:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:59,081 INFO L225 Difference]: With dead ends: 3744 [2020-08-18 18:41:59,082 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 18:41:59,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:41:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 18:41:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-18 18:41:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 18:41:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-18 18:41:59,160 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-18 18:41:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:59,161 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-18 18:41:59,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-18 18:41:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 18:41:59,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:59,163 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:41:59,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:41:59,163 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-18 18:41:59,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:59,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907572928] [2020-08-18 18:41:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:59,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:59,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907572928] [2020-08-18 18:41:59,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:59,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:59,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592141883] [2020-08-18 18:41:59,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:59,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:59,220 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-18 18:41:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:59,424 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-18 18:41:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:59,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-18 18:41:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:59,434 INFO L225 Difference]: With dead ends: 3741 [2020-08-18 18:41:59,434 INFO L226 Difference]: Without dead ends: 1891 [2020-08-18 18:41:59,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:41:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-18 18:41:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-18 18:41:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-18 18:41:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-18 18:41:59,502 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-18 18:41:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:59,502 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-18 18:41:59,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-18 18:41:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 18:41:59,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:59,505 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:41:59,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:41:59,506 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-18 18:41:59,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:59,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4076936] [2020-08-18 18:41:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:59,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:59,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4076936] [2020-08-18 18:41:59,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:59,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:59,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652144260] [2020-08-18 18:41:59,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:59,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:59,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:59,554 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-18 18:41:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:59,764 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-18 18:41:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:59,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-18 18:41:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:59,774 INFO L225 Difference]: With dead ends: 3810 [2020-08-18 18:41:59,775 INFO L226 Difference]: Without dead ends: 1960 [2020-08-18 18:41:59,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:41:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-18 18:41:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-18 18:41:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-18 18:41:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-18 18:41:59,844 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-18 18:41:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:59,845 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-18 18:41:59,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-18 18:41:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 18:41:59,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:59,847 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:41:59,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:41:59,847 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:59,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-18 18:41:59,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:59,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276874086] [2020-08-18 18:41:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:59,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:59,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276874086] [2020-08-18 18:41:59,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:59,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:59,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960420099] [2020-08-18 18:41:59,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:59,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:59,891 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-18 18:42:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:00,123 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-18 18:42:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:00,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-18 18:42:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:00,133 INFO L225 Difference]: With dead ends: 3946 [2020-08-18 18:42:00,134 INFO L226 Difference]: Without dead ends: 2096 [2020-08-18 18:42:00,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:42:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-18 18:42:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-18 18:42:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-18 18:42:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-18 18:42:00,214 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-18 18:42:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:00,214 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-18 18:42:00,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-18 18:42:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 18:42:00,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:00,216 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:42:00,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:42:00,217 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:00,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-18 18:42:00,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:00,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594415928] [2020-08-18 18:42:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:00,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 18:42:00,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594415928] [2020-08-18 18:42:00,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:00,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:00,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105336335] [2020-08-18 18:42:00,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:00,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:00,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:00,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:00,256 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-18 18:42:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:00,465 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-18 18:42:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:00,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-18 18:42:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:00,475 INFO L225 Difference]: With dead ends: 4276 [2020-08-18 18:42:00,476 INFO L226 Difference]: Without dead ends: 2293 [2020-08-18 18:42:00,480 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 18:42:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-18 18:42:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-18 18:42:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-18 18:42:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-18 18:42:00,550 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-18 18:42:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:00,550 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-18 18:42:00,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-18 18:42:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 18:42:00,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:00,552 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:42:00,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 18:42:00,553 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-18 18:42:00,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:00,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618899481] [2020-08-18 18:42:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:00,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 18:42:00,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618899481] [2020-08-18 18:42:00,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:00,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:00,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302854828] [2020-08-18 18:42:00,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:00,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:00,599 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-18 18:42:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:00,700 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-18 18:42:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:00,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-18 18:42:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:00,712 INFO L225 Difference]: With dead ends: 4420 [2020-08-18 18:42:00,713 INFO L226 Difference]: Without dead ends: 2947 [2020-08-18 18:42:00,716 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 18:42:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-18 18:42:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-18 18:42:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-18 18:42:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-18 18:42:00,789 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-18 18:42:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:00,789 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-18 18:42:00,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-18 18:42:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 18:42:00,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:00,791 INFO L422 BasicCegarLoop]: trace histogram [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 18:42:00,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 18:42:00,792 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-18 18:42:00,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:00,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453663137] [2020-08-18 18:42:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:42:00,814 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:42:00,814 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:42:00,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 18:42:00,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:42:00 BoogieIcfgContainer [2020-08-18 18:42:00,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:42:00,849 INFO L168 Benchmark]: Toolchain (without parser) took 7576.78 ms. Allocated memory was 143.7 MB in the beginning and 348.7 MB in the end (delta: 205.0 MB). Free memory was 104.4 MB in the beginning and 253.9 MB in the end (delta: -149.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:00,850 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 143.7 MB. Free memory was 123.2 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:42:00,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 523.92 ms. Allocated memory was 143.7 MB in the beginning and 205.5 MB in the end (delta: 61.9 MB). Free memory was 104.2 MB in the beginning and 180.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:00,851 INFO L168 Benchmark]: Boogie Preprocessor took 95.66 ms. Allocated memory is still 205.5 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:00,852 INFO L168 Benchmark]: RCFGBuilder took 865.39 ms. Allocated memory is still 205.5 MB. Free memory was 177.9 MB in the beginning and 124.7 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:00,853 INFO L168 Benchmark]: TraceAbstraction took 6086.66 ms. Allocated memory was 205.5 MB in the beginning and 348.7 MB in the end (delta: 143.1 MB). Free memory was 124.0 MB in the beginning and 253.9 MB in the end (delta: -130.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:00,857 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 143.7 MB. Free memory was 123.2 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 523.92 ms. Allocated memory was 143.7 MB in the beginning and 205.5 MB in the end (delta: 61.9 MB). Free memory was 104.2 MB in the beginning and 180.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.66 ms. Allocated memory is still 205.5 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 865.39 ms. Allocated memory is still 205.5 MB. Free memory was 177.9 MB in the beginning and 124.7 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6086.66 ms. Allocated memory was 205.5 MB in the beginning and 348.7 MB in the end (delta: 143.1 MB). Free memory was 124.0 MB in the beginning and 253.9 MB in the end (delta: -130.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 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...