/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 -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 16:16:59,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:16:59,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:16:59,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:16:59,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:16:59,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:16:59,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:16:59,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:16:59,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:16:59,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:16:59,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:16:59,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:16:59,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:16:59,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:16:59,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:16:59,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:16:59,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:16:59,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:16:59,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:16:59,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:16:59,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:16:59,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:16:59,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:16:59,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:16:59,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:16:59,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:16:59,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:16:59,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:16:59,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:16:59,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 16:16:59,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:16:59,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:16:59,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:16:59,967 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 16:16:59,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:16:59,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:16:59,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:16:59,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:16:59,991 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:16:59,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:16:59,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:16:59,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:16:59,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:16:59,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:16:59,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:16:59,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:16:59,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:16:59,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:16:59,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:16:59,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:16:59,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:16:59,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:16:59,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:16:59,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:16:59,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:16:59,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:16:59,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:16:59,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:16:59,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:16:59,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:16:59,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:16:59,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:16:59,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:16:59,996 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 [2020-08-18 16:17:00,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:00,319 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:00,326 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:00,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:00,328 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:00,330 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-18 16:17:00,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103556d25/427802acaf044b8a9829413c76bdf691/FLAGf352f966a [2020-08-18 16:17:00,933 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:00,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-18 16:17:00,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103556d25/427802acaf044b8a9829413c76bdf691/FLAGf352f966a [2020-08-18 16:17:01,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103556d25/427802acaf044b8a9829413c76bdf691 [2020-08-18 16:17:01,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:01,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:01,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:01,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:01,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:01,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712d0898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01, skipping insertion in model container [2020-08-18 16:17:01,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:01,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:01,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:01,570 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:01,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:01,739 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:01,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01 WrapperNode [2020-08-18 16:17:01,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:01,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:01,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:01,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:01,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (1/1) ... [2020-08-18 16:17:01,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:01,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:01,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:01,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:01,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (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 16:17:01,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:01,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:01,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 16:17:01,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 16:17:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 16:17:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 16:17:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:02,056 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 16:17:02,671 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 16:17:02,671 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 16:17:02,682 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:02,683 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 16:17:02,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:02 BoogieIcfgContainer [2020-08-18 16:17:02,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:02,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:02,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:02,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:02,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:01" (1/3) ... [2020-08-18 16:17:02,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f0e61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:02, skipping insertion in model container [2020-08-18 16:17:02,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:01" (2/3) ... [2020-08-18 16:17:02,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f0e61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:02, skipping insertion in model container [2020-08-18 16:17:02,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:02" (3/3) ... [2020-08-18 16:17:02,697 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-18 16:17:02,708 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:02,717 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:02,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:02,758 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:02,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:02,758 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:02,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:02,759 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:02,759 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:02,759 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:02,759 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-18 16:17:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 16:17:02,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:02,793 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 16:17:02,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-18 16:17:02,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:02,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877441071] [2020-08-18 16:17:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:03,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:03,072 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 16:17:03,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877441071] [2020-08-18 16:17:03,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:03,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:17:03,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882245528] [2020-08-18 16:17:03,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:17:03,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:03,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:17:03,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:17:03,106 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-18 16:17:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:03,528 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-18 16:17:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:17:03,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-18 16:17:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:03,546 INFO L225 Difference]: With dead ends: 375 [2020-08-18 16:17:03,547 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 16:17:03,552 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 16:17:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 16:17:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-18 16:17:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 16:17:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-18 16:17:03,614 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-18 16:17:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:03,615 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-18 16:17:03,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:17:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-18 16:17:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:17:03,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:03,617 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 16:17:03,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:03,618 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-18 16:17:03,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:03,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563803495] [2020-08-18 16:17:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:03,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:03,707 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 16:17:03,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563803495] [2020-08-18 16:17:03,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:03,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:17:03,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210475148] [2020-08-18 16:17:03,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:17:03,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:03,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:17:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:17:03,711 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-18 16:17:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:04,013 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-18 16:17:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:17:04,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-18 16:17:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:04,017 INFO L225 Difference]: With dead ends: 448 [2020-08-18 16:17:04,017 INFO L226 Difference]: Without dead ends: 260 [2020-08-18 16:17:04,019 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 16:17:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-18 16:17:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-18 16:17:04,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-18 16:17:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-18 16:17:04,042 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-18 16:17:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:04,043 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-18 16:17:04,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:17:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-18 16:17:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 16:17:04,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:04,045 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 16:17:04,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:04,045 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:04,046 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-18 16:17:04,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:04,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310076579] [2020-08-18 16:17:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,121 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 16:17:04,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310076579] [2020-08-18 16:17:04,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:04,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:04,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709238004] [2020-08-18 16:17:04,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:04,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:04,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:04,127 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-18 16:17:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:04,180 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-18 16:17:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:04,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-18 16:17:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:04,186 INFO L225 Difference]: With dead ends: 698 [2020-08-18 16:17:04,186 INFO L226 Difference]: Without dead ends: 466 [2020-08-18 16:17:04,192 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 16:17:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-18 16:17:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-18 16:17:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-18 16:17:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-18 16:17:04,244 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-18 16:17:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:04,250 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-18 16:17:04,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-18 16:17:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 16:17:04,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:04,252 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 16:17:04,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:04,252 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-18 16:17:04,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:04,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910051736] [2020-08-18 16:17:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,351 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 16:17:04,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910051736] [2020-08-18 16:17:04,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:04,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:17:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557658410] [2020-08-18 16:17:04,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:17:04,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:17:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:17:04,353 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-18 16:17:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:04,692 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-18 16:17:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:17:04,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 16:17:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:04,698 INFO L225 Difference]: With dead ends: 1155 [2020-08-18 16:17:04,698 INFO L226 Difference]: Without dead ends: 655 [2020-08-18 16:17:04,700 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 16:17:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-18 16:17:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-18 16:17:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-18 16:17:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-18 16:17:04,729 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-18 16:17:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:04,730 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-18 16:17:04,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:17:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-18 16:17:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 16:17:04,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:04,733 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 16:17:04,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:17:04,733 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:04,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-18 16:17:04,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:04,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126338613] [2020-08-18 16:17:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,812 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 16:17:04,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126338613] [2020-08-18 16:17:04,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:04,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:04,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550096152] [2020-08-18 16:17:04,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:04,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:04,817 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-18 16:17:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:04,837 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-18 16:17:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:04,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-18 16:17:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:04,841 INFO L225 Difference]: With dead ends: 1038 [2020-08-18 16:17:04,841 INFO L226 Difference]: Without dead ends: 526 [2020-08-18 16:17:04,843 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 16:17:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-18 16:17:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-18 16:17:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-18 16:17:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-18 16:17:04,864 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-18 16:17:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:04,866 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-18 16:17:04,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-18 16:17:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 16:17:04,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:04,873 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 16:17:04,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:17:04,874 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-18 16:17:04,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:04,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846407127] [2020-08-18 16:17:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:04,958 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 16:17:04,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846407127] [2020-08-18 16:17:04,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:04,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:04,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310169154] [2020-08-18 16:17:04,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:04,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:04,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:04,964 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-18 16:17:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:05,003 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-18 16:17:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:05,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 16:17:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:05,007 INFO L225 Difference]: With dead ends: 1048 [2020-08-18 16:17:05,008 INFO L226 Difference]: Without dead ends: 536 [2020-08-18 16:17:05,009 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 16:17:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-18 16:17:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-18 16:17:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-18 16:17:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-18 16:17:05,035 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-18 16:17:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:05,035 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-18 16:17:05,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-18 16:17:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 16:17:05,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:05,038 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 16:17:05,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:17:05,039 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-18 16:17:05,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:05,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660765455] [2020-08-18 16:17:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,106 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 16:17:05,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660765455] [2020-08-18 16:17:05,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:05,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:05,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350389066] [2020-08-18 16:17:05,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:05,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:05,109 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-18 16:17:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:05,419 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-18 16:17:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:05,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-18 16:17:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:05,424 INFO L225 Difference]: With dead ends: 1234 [2020-08-18 16:17:05,424 INFO L226 Difference]: Without dead ends: 670 [2020-08-18 16:17:05,426 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 16:17:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-18 16:17:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-18 16:17:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-18 16:17:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-18 16:17:05,450 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-18 16:17:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:05,450 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-18 16:17:05,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-18 16:17:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 16:17:05,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:05,451 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 16:17:05,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:17:05,452 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:05,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-18 16:17:05,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:05,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233702460] [2020-08-18 16:17:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,496 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 16:17:05,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233702460] [2020-08-18 16:17:05,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:05,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:05,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981555606] [2020-08-18 16:17:05,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:05,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:05,498 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-18 16:17:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:05,541 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-18 16:17:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:05,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-18 16:17:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:05,547 INFO L225 Difference]: With dead ends: 1720 [2020-08-18 16:17:05,548 INFO L226 Difference]: Without dead ends: 1149 [2020-08-18 16:17:05,549 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 16:17:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-18 16:17:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-18 16:17:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-18 16:17:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-18 16:17:05,586 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-18 16:17:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:05,586 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-18 16:17:05,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-18 16:17:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 16:17:05,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:05,588 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 16:17:05,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:17:05,588 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-18 16:17:05,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:05,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992405241] [2020-08-18 16:17:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,633 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 16:17:05,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992405241] [2020-08-18 16:17:05,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:05,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:05,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031547498] [2020-08-18 16:17:05,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:05,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:05,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:05,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:05,636 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-18 16:17:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:05,699 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-18 16:17:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:05,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-18 16:17:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:05,708 INFO L225 Difference]: With dead ends: 2602 [2020-08-18 16:17:05,709 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 16:17:05,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 16:17:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-18 16:17:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-18 16:17:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-18 16:17:05,797 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-18 16:17:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:05,797 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-18 16:17:05,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-18 16:17:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 16:17:05,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:05,799 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 16:17:05,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:17:05,799 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-18 16:17:05,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:05,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141504131] [2020-08-18 16:17:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:05,840 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 16:17:05,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141504131] [2020-08-18 16:17:05,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:05,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:05,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961593810] [2020-08-18 16:17:05,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:05,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:05,843 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-18 16:17:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:06,061 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-18 16:17:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:06,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 16:17:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:06,073 INFO L225 Difference]: With dead ends: 3635 [2020-08-18 16:17:06,073 INFO L226 Difference]: Without dead ends: 1924 [2020-08-18 16:17:06,078 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 16:17:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-18 16:17:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-18 16:17:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 16:17:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-18 16:17:06,167 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-18 16:17:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:06,168 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-18 16:17:06,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-18 16:17:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 16:17:06,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:06,171 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 16:17:06,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:17:06,171 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-18 16:17:06,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:06,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319319505] [2020-08-18 16:17:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:06,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:06,220 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 16:17:06,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319319505] [2020-08-18 16:17:06,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:06,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:06,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249734413] [2020-08-18 16:17:06,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:06,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:06,222 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-18 16:17:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:06,444 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-18 16:17:06,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:06,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-18 16:17:06,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:06,454 INFO L225 Difference]: With dead ends: 3747 [2020-08-18 16:17:06,454 INFO L226 Difference]: Without dead ends: 1933 [2020-08-18 16:17:06,458 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 16:17:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-18 16:17:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-18 16:17:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 16:17:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-18 16:17:06,569 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-18 16:17:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:06,569 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-18 16:17:06,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-18 16:17:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 16:17:06,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:06,571 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 16:17:06,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 16:17:06,572 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-18 16:17:06,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:06,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367040930] [2020-08-18 16:17:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:06,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:06,617 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 16:17:06,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367040930] [2020-08-18 16:17:06,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:06,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:06,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047283907] [2020-08-18 16:17:06,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:06,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:06,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:06,619 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-18 16:17:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:06,837 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-18 16:17:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:06,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-18 16:17:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:06,848 INFO L225 Difference]: With dead ends: 3744 [2020-08-18 16:17:06,848 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 16:17:06,852 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 16:17:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 16:17:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-18 16:17:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 16:17:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-18 16:17:06,920 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-18 16:17:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:06,920 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-18 16:17:06,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-18 16:17:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 16:17:06,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:06,922 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 16:17:06,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 16:17:06,922 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-18 16:17:06,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:06,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513388816] [2020-08-18 16:17:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:06,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:06,960 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 16:17:06,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513388816] [2020-08-18 16:17:06,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:06,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:06,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313231585] [2020-08-18 16:17:06,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:06,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:06,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:06,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:06,962 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-18 16:17:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:07,157 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-18 16:17:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:07,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-18 16:17:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:07,166 INFO L225 Difference]: With dead ends: 3741 [2020-08-18 16:17:07,167 INFO L226 Difference]: Without dead ends: 1891 [2020-08-18 16:17:07,171 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 16:17:07,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-18 16:17:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-18 16:17:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-18 16:17:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-18 16:17:07,267 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-18 16:17:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:07,268 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-18 16:17:07,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-18 16:17:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 16:17:07,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:07,269 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 16:17:07,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 16:17:07,270 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:07,270 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-18 16:17:07,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:07,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219803027] [2020-08-18 16:17:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,306 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 16:17:07,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219803027] [2020-08-18 16:17:07,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:07,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:07,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151101435] [2020-08-18 16:17:07,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:07,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:07,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:07,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:07,308 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-18 16:17:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:07,511 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-18 16:17:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:07,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-18 16:17:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:07,524 INFO L225 Difference]: With dead ends: 3810 [2020-08-18 16:17:07,524 INFO L226 Difference]: Without dead ends: 1960 [2020-08-18 16:17:07,530 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 16:17:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-18 16:17:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-18 16:17:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-18 16:17:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-18 16:17:07,619 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-18 16:17:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:07,620 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-18 16:17:07,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-18 16:17:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 16:17:07,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:07,622 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 16:17:07,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 16:17:07,622 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-18 16:17:07,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:07,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631806139] [2020-08-18 16:17:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,671 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 16:17:07,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631806139] [2020-08-18 16:17:07,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:07,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:07,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798456813] [2020-08-18 16:17:07,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:07,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:07,674 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-18 16:17:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:07,929 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-18 16:17:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:07,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-18 16:17:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:07,940 INFO L225 Difference]: With dead ends: 3946 [2020-08-18 16:17:07,940 INFO L226 Difference]: Without dead ends: 2096 [2020-08-18 16:17:07,945 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 16:17:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-18 16:17:08,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-18 16:17:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-18 16:17:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-18 16:17:08,018 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-18 16:17:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,019 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-18 16:17:08,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-18 16:17:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 16:17:08,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,020 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 16:17:08,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 16:17:08,021 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-18 16:17:08,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040207416] [2020-08-18 16:17:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,054 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 16:17:08,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040207416] [2020-08-18 16:17:08,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878004950] [2020-08-18 16:17:08,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,056 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-18 16:17:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,317 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-18 16:17:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-18 16:17:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,328 INFO L225 Difference]: With dead ends: 4276 [2020-08-18 16:17:08,329 INFO L226 Difference]: Without dead ends: 2293 [2020-08-18 16:17:08,333 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 16:17:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-18 16:17:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-18 16:17:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-18 16:17:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-18 16:17:08,413 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-18 16:17:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,413 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-18 16:17:08,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-18 16:17:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 16:17:08,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,416 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 16:17:08,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 16:17:08,416 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-18 16:17:08,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283907382] [2020-08-18 16:17:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,467 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 16:17:08,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283907382] [2020-08-18 16:17:08,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402568871] [2020-08-18 16:17:08,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,471 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-18 16:17:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,573 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-18 16:17:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-18 16:17:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,591 INFO L225 Difference]: With dead ends: 4420 [2020-08-18 16:17:08,591 INFO L226 Difference]: Without dead ends: 2947 [2020-08-18 16:17:08,597 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 16:17:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-18 16:17:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-18 16:17:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-18 16:17:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-18 16:17:08,715 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-18 16:17:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,716 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-18 16:17:08,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-18 16:17:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 16:17:08,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,718 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 16:17:08,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 16:17:08,718 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-18 16:17:08,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077154658] [2020-08-18 16:17:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:17:08,743 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:17:08,743 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:17:08,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 16:17:08,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:08 BoogieIcfgContainer [2020-08-18 16:17:08,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:08,785 INFO L168 Benchmark]: Toolchain (without parser) took 7537.10 ms. Allocated memory was 140.5 MB in the beginning and 326.1 MB in the end (delta: 185.6 MB). Free memory was 102.1 MB in the beginning and 122.7 MB in the end (delta: -20.6 MB). Peak memory consumption was 165.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:08,785 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-18 16:17:08,786 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.11 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 178.5 MB in the end (delta: -76.6 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:08,787 INFO L168 Benchmark]: Boogie Preprocessor took 65.11 ms. Allocated memory is still 203.4 MB. Free memory was 178.5 MB in the beginning and 175.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:08,787 INFO L168 Benchmark]: RCFGBuilder took 882.42 ms. Allocated memory is still 203.4 MB. Free memory was 175.9 MB in the beginning and 122.4 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:08,788 INFO L168 Benchmark]: TraceAbstraction took 6091.52 ms. Allocated memory was 203.4 MB in the beginning and 326.1 MB in the end (delta: 122.7 MB). Free memory was 122.4 MB in the beginning and 122.7 MB in the end (delta: -337.7 kB). Peak memory consumption was 122.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:08,791 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 490.11 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 178.5 MB in the end (delta: -76.6 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.11 ms. Allocated memory is still 203.4 MB. Free memory was 178.5 MB in the beginning and 175.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 882.42 ms. Allocated memory is still 203.4 MB. Free memory was 175.9 MB in the beginning and 122.4 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6091.52 ms. Allocated memory was 203.4 MB in the beginning and 326.1 MB in the end (delta: 122.7 MB). Free memory was 122.4 MB in the beginning and 122.7 MB in the end (delta: -337.7 kB). Peak memory consumption was 122.3 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: 1.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s 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...