/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=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 0.1.25-177f698 [2020-08-21 14:55:50,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:55:50,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:55:50,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:55:50,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:55:50,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:55:50,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:55:50,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:55:50,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:55:50,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:55:50,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:55:50,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:55:50,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:55:50,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:55:50,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:55:50,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:55:50,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:55:50,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:55:50,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:55:51,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:55:51,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:55:51,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:55:51,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:55:51,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:55:51,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:55:51,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:55:51,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:55:51,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:55:51,027 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 [2020-08-21 14:55:51,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:55:51,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:55:51,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:55:51,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:55:51,068 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:55:51,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:55:51,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:55:51,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:55:51,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:55:51,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:55:51,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:55:51,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:55:51,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:55:51,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:55:51,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:55:51,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:55:51,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:55:51,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:55:51,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:55:51,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:55:51,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:55:51,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:55:51,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:55:51,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:55:51,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:55:51,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:55:51,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:55:51,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:55:51,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:55:51,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:55:51,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:55:51,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:55:51,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:55:51,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:55:51,375 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:55:51,375 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 14:55:51,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7735571ce/4d7ebdacaaed491bb66d67fd9307c3b6/FLAGb67bfaeb2 [2020-08-21 14:55:51,919 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:55:51,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 14:55:51,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7735571ce/4d7ebdacaaed491bb66d67fd9307c3b6/FLAGb67bfaeb2 [2020-08-21 14:55:52,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7735571ce/4d7ebdacaaed491bb66d67fd9307c3b6 [2020-08-21 14:55:52,311 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:55:52,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:55:52,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:55:52,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:55:52,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:55:52,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35692340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52, skipping insertion in model container [2020-08-21 14:55:52,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:55:52,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:55:52,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:55:52,724 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:55:52,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:55:52,892 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:55:52,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52 WrapperNode [2020-08-21 14:55:52,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:55:52,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:55:52,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:55:52,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:55:52,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (1/1) ... [2020-08-21 14:55:52,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:55:52,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:55:52,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:55:52,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:55:52,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (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 [2020-08-21 14:55:53,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:55:53,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:55:53,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 14:55:53,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:55:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:55:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 14:55:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:55:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 14:55:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 14:55:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:55:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:55:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:55:53,231 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:55:53,879 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 14:55:53,880 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 14:55:53,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:55:53,892 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:55:53,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:55:53 BoogieIcfgContainer [2020-08-21 14:55:53,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:55:53,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:55:53,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:55:53,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:55:53,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:55:52" (1/3) ... [2020-08-21 14:55:53,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2275aef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:55:53, skipping insertion in model container [2020-08-21 14:55:53,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:52" (2/3) ... [2020-08-21 14:55:53,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2275aef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:55:53, skipping insertion in model container [2020-08-21 14:55:53,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:55:53" (3/3) ... [2020-08-21 14:55:53,908 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-21 14:55:53,920 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:55:53,928 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:55:53,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:55:53,968 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:55:53,968 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:55:53,969 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:55:53,969 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:55:53,969 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:55:53,969 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:55:53,969 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:55:53,969 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:55:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-21 14:55:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:55:54,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:54,002 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] [2020-08-21 14:55:54,003 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:54,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-21 14:55:54,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:54,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453601424] [2020-08-21 14:55:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:54,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:54,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453601424] [2020-08-21 14:55:54,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:54,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:55:54,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181810898] [2020-08-21 14:55:54,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:55:54,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:54,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:55:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:55:54,347 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-21 14:55:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:54,986 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-21 14:55:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:55:54,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 14:55:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:55,005 INFO L225 Difference]: With dead ends: 375 [2020-08-21 14:55:55,006 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 14:55:55,011 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 [2020-08-21 14:55:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 14:55:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-21 14:55:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 14:55:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-21 14:55:55,069 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-21 14:55:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:55,069 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-21 14:55:55,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:55:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-21 14:55:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:55:55,071 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:55,072 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] [2020-08-21 14:55:55,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:55:55,072 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-21 14:55:55,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:55,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994055930] [2020-08-21 14:55:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:55,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:55,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994055930] [2020-08-21 14:55:55,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:55,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:55:55,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247183862] [2020-08-21 14:55:55,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:55:55,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:55,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:55:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:55:55,208 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-21 14:55:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:55,561 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-21 14:55:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:55:55,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-21 14:55:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:55,565 INFO L225 Difference]: With dead ends: 448 [2020-08-21 14:55:55,566 INFO L226 Difference]: Without dead ends: 260 [2020-08-21 14:55:55,571 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 [2020-08-21 14:55:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-21 14:55:55,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-21 14:55:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-21 14:55:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-21 14:55:55,621 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-21 14:55:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:55,621 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-21 14:55:55,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:55:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-21 14:55:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 14:55:55,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:55,624 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] [2020-08-21 14:55:55,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:55:55,626 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-21 14:55:55,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:55,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105327252] [2020-08-21 14:55:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:55,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:55,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105327252] [2020-08-21 14:55:55,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:55,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:55,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822873911] [2020-08-21 14:55:55,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:55,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:55,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:55,753 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-21 14:55:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:55,785 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-21 14:55:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:55,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-21 14:55:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:55,789 INFO L225 Difference]: With dead ends: 698 [2020-08-21 14:55:55,790 INFO L226 Difference]: Without dead ends: 466 [2020-08-21 14:55:55,792 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 [2020-08-21 14:55:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-21 14:55:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-21 14:55:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-21 14:55:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-21 14:55:55,825 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-21 14:55:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:55,825 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-21 14:55:55,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-21 14:55:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 14:55:55,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:55,827 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] [2020-08-21 14:55:55,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:55:55,828 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:55,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-21 14:55:55,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:55,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945441306] [2020-08-21 14:55:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:55,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:55,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945441306] [2020-08-21 14:55:55,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:55,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:55:55,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420753409] [2020-08-21 14:55:55,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:55:55,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:55,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:55:55,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:55:55,912 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-21 14:55:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:56,256 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-21 14:55:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:55:56,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 14:55:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:56,261 INFO L225 Difference]: With dead ends: 1155 [2020-08-21 14:55:56,261 INFO L226 Difference]: Without dead ends: 655 [2020-08-21 14:55:56,263 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 [2020-08-21 14:55:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-21 14:55:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-21 14:55:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 14:55:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-21 14:55:56,291 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-21 14:55:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:56,292 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-21 14:55:56,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:55:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-21 14:55:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 14:55:56,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:56,295 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] [2020-08-21 14:55:56,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:55:56,296 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:56,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-21 14:55:56,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:56,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600277230] [2020-08-21 14:55:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:56,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600277230] [2020-08-21 14:55:56,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:56,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:56,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829647226] [2020-08-21 14:55:56,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:56,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:56,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:56,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:56,349 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-21 14:55:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:56,370 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-21 14:55:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:56,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-21 14:55:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:56,374 INFO L225 Difference]: With dead ends: 1038 [2020-08-21 14:55:56,375 INFO L226 Difference]: Without dead ends: 526 [2020-08-21 14:55:56,376 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 [2020-08-21 14:55:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-21 14:55:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-21 14:55:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 14:55:56,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-21 14:55:56,400 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-21 14:55:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:56,400 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-21 14:55:56,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-21 14:55:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:55:56,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:56,403 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] [2020-08-21 14:55:56,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:55:56,404 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-21 14:55:56,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:56,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941518013] [2020-08-21 14:55:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:56,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941518013] [2020-08-21 14:55:56,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:56,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:56,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180175341] [2020-08-21 14:55:56,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:56,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:56,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:56,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:56,454 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-21 14:55:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:56,500 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-21 14:55:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:56,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 14:55:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:56,504 INFO L225 Difference]: With dead ends: 1048 [2020-08-21 14:55:56,505 INFO L226 Difference]: Without dead ends: 536 [2020-08-21 14:55:56,506 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 [2020-08-21 14:55:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-21 14:55:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-21 14:55:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-21 14:55:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-21 14:55:56,539 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-21 14:55:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:56,540 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-21 14:55:56,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-21 14:55:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 14:55:56,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:56,544 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] [2020-08-21 14:55:56,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:55:56,544 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-21 14:55:56,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:56,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632333591] [2020-08-21 14:55:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:56,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632333591] [2020-08-21 14:55:56,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:56,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:56,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288894238] [2020-08-21 14:55:56,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:56,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:56,611 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-21 14:55:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:56,853 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-21 14:55:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:56,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-21 14:55:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:56,858 INFO L225 Difference]: With dead ends: 1234 [2020-08-21 14:55:56,858 INFO L226 Difference]: Without dead ends: 670 [2020-08-21 14:55:56,861 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 [2020-08-21 14:55:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-21 14:55:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-21 14:55:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-21 14:55:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-21 14:55:56,886 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-21 14:55:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:56,887 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-21 14:55:56,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-21 14:55:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:55:56,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:56,889 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] [2020-08-21 14:55:56,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:55:56,890 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:56,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:56,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-21 14:55:56,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:56,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666042106] [2020-08-21 14:55:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:56,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666042106] [2020-08-21 14:55:56,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:56,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:56,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380495250] [2020-08-21 14:55:56,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:56,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:56,966 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-21 14:55:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:57,019 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-21 14:55:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:57,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 14:55:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:57,028 INFO L225 Difference]: With dead ends: 1720 [2020-08-21 14:55:57,029 INFO L226 Difference]: Without dead ends: 1149 [2020-08-21 14:55:57,031 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 [2020-08-21 14:55:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-21 14:55:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-21 14:55:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-21 14:55:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-21 14:55:57,087 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-21 14:55:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:57,089 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-21 14:55:57,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-21 14:55:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:55:57,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:57,091 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] [2020-08-21 14:55:57,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:55:57,092 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-21 14:55:57,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:57,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231939416] [2020-08-21 14:55:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:57,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:57,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231939416] [2020-08-21 14:55:57,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:57,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:57,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578207153] [2020-08-21 14:55:57,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:57,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:57,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:57,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:57,171 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-21 14:55:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:57,258 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-21 14:55:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:57,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 14:55:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:57,272 INFO L225 Difference]: With dead ends: 2602 [2020-08-21 14:55:57,275 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 14:55:57,279 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 [2020-08-21 14:55:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 14:55:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-21 14:55:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-21 14:55:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-21 14:55:57,409 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-21 14:55:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:57,410 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-21 14:55:57,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-21 14:55:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 14:55:57,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:57,414 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] [2020-08-21 14:55:57,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:55:57,414 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:57,415 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-21 14:55:57,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:57,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320397335] [2020-08-21 14:55:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:57,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:57,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320397335] [2020-08-21 14:55:57,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:57,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:57,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718333154] [2020-08-21 14:55:57,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:57,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:57,494 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-21 14:55:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:57,733 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-21 14:55:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:57,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 14:55:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:57,745 INFO L225 Difference]: With dead ends: 3635 [2020-08-21 14:55:57,745 INFO L226 Difference]: Without dead ends: 1924 [2020-08-21 14:55:57,750 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 [2020-08-21 14:55:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-21 14:55:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-21 14:55:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 14:55:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-21 14:55:57,828 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-21 14:55:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:57,829 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-21 14:55:57,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-21 14:55:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 14:55:57,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:57,831 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] [2020-08-21 14:55:57,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:55:57,831 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:57,831 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-21 14:55:57,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:57,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654388846] [2020-08-21 14:55:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:57,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:57,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654388846] [2020-08-21 14:55:57,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:57,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:57,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277190294] [2020-08-21 14:55:57,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:57,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:57,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:57,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:57,891 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-21 14:55:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:58,117 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-21 14:55:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:58,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 14:55:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:58,130 INFO L225 Difference]: With dead ends: 3747 [2020-08-21 14:55:58,130 INFO L226 Difference]: Without dead ends: 1933 [2020-08-21 14:55:58,136 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 [2020-08-21 14:55:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-21 14:55:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-21 14:55:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 14:55:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-21 14:55:58,261 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-21 14:55:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:58,263 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-21 14:55:58,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-21 14:55:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 14:55:58,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:58,265 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] [2020-08-21 14:55:58,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:55:58,265 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-21 14:55:58,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:58,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596185341] [2020-08-21 14:55:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:58,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:58,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596185341] [2020-08-21 14:55:58,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:58,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:58,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90019141] [2020-08-21 14:55:58,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:58,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:58,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:58,351 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-21 14:55:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:58,563 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-21 14:55:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:58,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 14:55:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:58,574 INFO L225 Difference]: With dead ends: 3744 [2020-08-21 14:55:58,574 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 14:55:58,578 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 [2020-08-21 14:55:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 14:55:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-21 14:55:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 14:55:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-21 14:55:58,653 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-21 14:55:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:58,653 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-21 14:55:58,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-21 14:55:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:55:58,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:58,655 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] [2020-08-21 14:55:58,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:55:58,655 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-21 14:55:58,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:58,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493386035] [2020-08-21 14:55:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:58,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:58,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493386035] [2020-08-21 14:55:58,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:58,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:58,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263251108] [2020-08-21 14:55:58,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:58,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:58,696 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-21 14:55:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:58,907 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-21 14:55:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:58,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-21 14:55:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:58,920 INFO L225 Difference]: With dead ends: 3741 [2020-08-21 14:55:58,920 INFO L226 Difference]: Without dead ends: 1891 [2020-08-21 14:55:58,926 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 [2020-08-21 14:55:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-21 14:55:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-21 14:55:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 14:55:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-21 14:55:59,021 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-21 14:55:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:59,021 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-21 14:55:59,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-21 14:55:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:55:59,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:59,023 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] [2020-08-21 14:55:59,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:55:59,024 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-21 14:55:59,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:59,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870912342] [2020-08-21 14:55:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:59,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:59,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870912342] [2020-08-21 14:55:59,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:59,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:59,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213916038] [2020-08-21 14:55:59,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:59,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:59,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:59,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:59,088 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-21 14:55:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:59,300 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-21 14:55:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:59,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-21 14:55:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:59,315 INFO L225 Difference]: With dead ends: 3810 [2020-08-21 14:55:59,316 INFO L226 Difference]: Without dead ends: 1960 [2020-08-21 14:55:59,323 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 [2020-08-21 14:55:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-21 14:55:59,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-21 14:55:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 14:55:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-21 14:55:59,422 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-21 14:55:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:59,422 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-21 14:55:59,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:55:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-21 14:55:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 14:55:59,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:59,430 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] [2020-08-21 14:55:59,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:55:59,431 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:59,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-21 14:55:59,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:59,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800504769] [2020-08-21 14:55:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:59,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:59,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800504769] [2020-08-21 14:55:59,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:59,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:55:59,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397806642] [2020-08-21 14:55:59,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:55:59,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:55:59,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:55:59,519 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-21 14:55:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:59,804 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-21 14:55:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:55:59,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-21 14:55:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:59,820 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 14:55:59,821 INFO L226 Difference]: Without dead ends: 2096 [2020-08-21 14:55:59,830 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 [2020-08-21 14:55:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-21 14:55:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-21 14:55:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-21 14:56:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-21 14:56:00,035 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-21 14:56:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:00,036 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-21 14:56:00,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-21 14:56:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:56:00,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:00,042 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] [2020-08-21 14:56:00,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:56:00,043 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-21 14:56:00,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:00,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684899437] [2020-08-21 14:56:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:00,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 14:56:00,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684899437] [2020-08-21 14:56:00,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:00,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:00,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877270212] [2020-08-21 14:56:00,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:00,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:00,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:00,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:00,100 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-21 14:56:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:00,385 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-21 14:56:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:00,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 14:56:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:00,398 INFO L225 Difference]: With dead ends: 4276 [2020-08-21 14:56:00,399 INFO L226 Difference]: Without dead ends: 2293 [2020-08-21 14:56:00,404 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 [2020-08-21 14:56:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-21 14:56:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-21 14:56:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-21 14:56:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-21 14:56:00,502 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-21 14:56:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:00,502 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-21 14:56:00,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-21 14:56:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:56:00,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:00,504 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] [2020-08-21 14:56:00,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:56:00,505 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:00,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-21 14:56:00,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:00,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551310942] [2020-08-21 14:56:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:00,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 14:56:00,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551310942] [2020-08-21 14:56:00,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:00,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:00,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912258591] [2020-08-21 14:56:00,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:00,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:00,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:00,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:00,583 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-21 14:56:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:00,659 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-21 14:56:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:00,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 14:56:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:00,675 INFO L225 Difference]: With dead ends: 4420 [2020-08-21 14:56:00,675 INFO L226 Difference]: Without dead ends: 2947 [2020-08-21 14:56:00,680 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 [2020-08-21 14:56:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-21 14:56:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-21 14:56:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-21 14:56:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-21 14:56:00,778 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-21 14:56:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:00,779 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-21 14:56:00,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-21 14:56:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 14:56:00,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:00,781 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] [2020-08-21 14:56:00,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:56:00,781 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-21 14:56:00,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:00,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661255210] [2020-08-21 14:56:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:56:00,821 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:56:00,821 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:56:00,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:56:00,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:56:00 BoogieIcfgContainer [2020-08-21 14:56:00,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:56:00,886 INFO L168 Benchmark]: Toolchain (without parser) took 8566.30 ms. Allocated memory was 140.5 MB in the beginning and 317.7 MB in the end (delta: 177.2 MB). Free memory was 103.3 MB in the beginning and 87.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 193.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:00,887 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:56:00,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 582.98 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 178.4 MB in the end (delta: -75.5 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:00,893 INFO L168 Benchmark]: Boogie Preprocessor took 71.19 ms. Allocated memory is still 203.4 MB. Free memory was 178.4 MB in the beginning and 175.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:00,893 INFO L168 Benchmark]: RCFGBuilder took 929.95 ms. Allocated memory is still 203.4 MB. Free memory was 175.7 MB in the beginning and 122.2 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:00,896 INFO L168 Benchmark]: TraceAbstraction took 6976.79 ms. Allocated memory was 203.4 MB in the beginning and 317.7 MB in the end (delta: 114.3 MB). Free memory was 121.6 MB in the beginning and 87.1 MB in the end (delta: 34.5 MB). Peak memory consumption was 148.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:00,902 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 582.98 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 178.4 MB in the end (delta: -75.5 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.19 ms. Allocated memory is still 203.4 MB. Free memory was 178.4 MB in the beginning and 175.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 929.95 ms. Allocated memory is still 203.4 MB. Free memory was 175.7 MB in the beginning and 122.2 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6976.79 ms. Allocated memory was 203.4 MB in the beginning and 317.7 MB in the end (delta: 114.3 MB). Free memory was 121.6 MB in the beginning and 87.1 MB in the end (delta: 34.5 MB). Peak memory consumption was 148.8 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: 6.8s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.8s, 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, 1.9s 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: 1.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...