/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --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_13.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:08:58,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:08:58,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:08:58,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:08:58,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:08:58,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:08:58,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:08:58,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:08:58,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:08:58,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:08:58,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:08:58,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:08:58,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:08:58,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:08:58,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:08:58,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:08:58,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:08:58,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:08:58,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:08:58,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:08:58,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:08:58,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:08:58,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:08:58,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:08:58,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:08:58,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:08:58,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:08:58,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:08:58,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:08:58,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:08:58,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:08:58,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:08:58,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:08:58,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:08:58,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:08:58,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:08:58,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:08:58,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:08:58,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:08:58,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:08:58,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:08:58,180 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 18:08:58,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:08:58,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:08:58,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:08:58,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:08:58,228 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:08:58,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:08:58,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:08:58,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:08:58,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:08:58,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:08:58,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:08:58,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:08:58,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:08:58,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:08:58,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:08:58,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:08:58,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:08:58,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:08:58,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:08:58,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:08:58,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:08:58,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:08:58,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:08:58,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:08:58,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:08:58,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:08:58,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:08:58,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:08:58,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:08:58,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:08:58,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:08:58,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:08:58,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:08:58,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:08:58,546 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:08:58,547 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-08-21 18:08:58,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b6bb9966/0f1f02f549c34ef29e03c150416a5a1f/FLAG6cd27ec76 [2020-08-21 18:08:59,199 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:08:59,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-08-21 18:08:59,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b6bb9966/0f1f02f549c34ef29e03c150416a5a1f/FLAG6cd27ec76 [2020-08-21 18:08:59,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b6bb9966/0f1f02f549c34ef29e03c150416a5a1f [2020-08-21 18:08:59,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:08:59,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:08:59,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:08:59,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:08:59,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:08:59,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:08:59" (1/1) ... [2020-08-21 18:08:59,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339faaff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:59, skipping insertion in model container [2020-08-21 18:08:59,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:08:59" (1/1) ... [2020-08-21 18:08:59,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:08:59,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:08:59,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:08:59,842 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:08:59,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:00,005 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:09:00,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00 WrapperNode [2020-08-21 18:09:00,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:00,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:09:00,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:09:00,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:09:00,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (1/1) ... [2020-08-21 18:09:00,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (1/1) ... [2020-08-21 18:09:00,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (1/1) ... [2020-08-21 18:09:00,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (1/1) ... [2020-08-21 18:09:00,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (1/1) ... [2020-08-21 18:09:00,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (1/1) ... [2020-08-21 18:09:00,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (1/1) ... [2020-08-21 18:09:00,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:09:00,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:09:00,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:09:00,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:09:00,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (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 18:09:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:09:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:09:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 18:09:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:09:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:09:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 18:09:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:09:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 18:09:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 18:09:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:09:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:09:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:09:00,434 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 18:09:00,991 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 18:09:00,992 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 18:09:01,004 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:09:01,004 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:09:01,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:01 BoogieIcfgContainer [2020-08-21 18:09:01,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:09:01,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:09:01,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:09:01,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:09:01,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:08:59" (1/3) ... [2020-08-21 18:09:01,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283c8d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:01, skipping insertion in model container [2020-08-21 18:09:01,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:00" (2/3) ... [2020-08-21 18:09:01,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283c8d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:01, skipping insertion in model container [2020-08-21 18:09:01,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:01" (3/3) ... [2020-08-21 18:09:01,020 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2020-08-21 18:09:01,032 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:09:01,041 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:09:01,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:09:01,082 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:09:01,083 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:09:01,083 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:09:01,083 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:09:01,083 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:09:01,083 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:09:01,083 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:09:01,083 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:09:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states. [2020-08-21 18:09:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:09:01,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:01,115 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 18:09:01,116 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash 317102767, now seen corresponding path program 1 times [2020-08-21 18:09:01,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:01,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244518775] [2020-08-21 18:09:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:01,493 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 18:09:01,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244518775] [2020-08-21 18:09:01,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:01,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:09:01,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187704608] [2020-08-21 18:09:01,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:09:01,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:09:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:09:01,527 INFO L87 Difference]: Start difference. First operand 161 states. Second operand 5 states. [2020-08-21 18:09:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:01,967 INFO L93 Difference]: Finished difference Result 376 states and 647 transitions. [2020-08-21 18:09:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:09:01,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-21 18:09:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:01,984 INFO L225 Difference]: With dead ends: 376 [2020-08-21 18:09:01,985 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 18:09:01,989 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 18:09:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 18:09:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2020-08-21 18:09:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-08-21 18:09:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 279 transitions. [2020-08-21 18:09:02,052 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 279 transitions. Word has length 31 [2020-08-21 18:09:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:02,053 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 279 transitions. [2020-08-21 18:09:02,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:09:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 279 transitions. [2020-08-21 18:09:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 18:09:02,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:02,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:02,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:09:02,056 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash 115186168, now seen corresponding path program 1 times [2020-08-21 18:09:02,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:02,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865912232] [2020-08-21 18:09:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:02,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:02,168 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 18:09:02,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865912232] [2020-08-21 18:09:02,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:02,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:09:02,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985606862] [2020-08-21 18:09:02,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:09:02,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:09:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:09:02,172 INFO L87 Difference]: Start difference. First operand 189 states and 279 transitions. Second operand 6 states. [2020-08-21 18:09:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:02,512 INFO L93 Difference]: Finished difference Result 444 states and 670 transitions. [2020-08-21 18:09:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:09:02,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-08-21 18:09:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:02,516 INFO L225 Difference]: With dead ends: 444 [2020-08-21 18:09:02,517 INFO L226 Difference]: Without dead ends: 256 [2020-08-21 18:09:02,519 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 18:09:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-21 18:09:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 217. [2020-08-21 18:09:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-08-21 18:09:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 318 transitions. [2020-08-21 18:09:02,541 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 318 transitions. Word has length 35 [2020-08-21 18:09:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:02,541 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 318 transitions. [2020-08-21 18:09:02,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:09:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 318 transitions. [2020-08-21 18:09:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 18:09:02,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:02,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:02,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:09:02,545 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1717181183, now seen corresponding path program 1 times [2020-08-21 18:09:02,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:02,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439863970] [2020-08-21 18:09:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:02,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:02,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439863970] [2020-08-21 18:09:02,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:02,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:02,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784759637] [2020-08-21 18:09:02,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:02,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:02,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:02,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:02,629 INFO L87 Difference]: Start difference. First operand 217 states and 318 transitions. Second operand 3 states. [2020-08-21 18:09:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:02,877 INFO L93 Difference]: Finished difference Result 505 states and 753 transitions. [2020-08-21 18:09:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:02,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-08-21 18:09:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:02,881 INFO L225 Difference]: With dead ends: 505 [2020-08-21 18:09:02,881 INFO L226 Difference]: Without dead ends: 289 [2020-08-21 18:09:02,883 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 18:09:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-08-21 18:09:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 259. [2020-08-21 18:09:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-08-21 18:09:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 380 transitions. [2020-08-21 18:09:02,900 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 380 transitions. Word has length 49 [2020-08-21 18:09:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:02,900 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 380 transitions. [2020-08-21 18:09:02,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 380 transitions. [2020-08-21 18:09:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:09:02,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:02,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:02,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:09:02,904 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash -544977436, now seen corresponding path program 1 times [2020-08-21 18:09:02,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:02,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640408335] [2020-08-21 18:09:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:02,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:02,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640408335] [2020-08-21 18:09:02,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:02,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 18:09:02,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418390155] [2020-08-21 18:09:02,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:09:02,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:09:02,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:09:02,980 INFO L87 Difference]: Start difference. First operand 259 states and 380 transitions. Second operand 4 states. [2020-08-21 18:09:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:03,231 INFO L93 Difference]: Finished difference Result 665 states and 981 transitions. [2020-08-21 18:09:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:09:03,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-08-21 18:09:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:03,236 INFO L225 Difference]: With dead ends: 665 [2020-08-21 18:09:03,236 INFO L226 Difference]: Without dead ends: 407 [2020-08-21 18:09:03,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:09:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-08-21 18:09:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 285. [2020-08-21 18:09:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-08-21 18:09:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 417 transitions. [2020-08-21 18:09:03,255 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 417 transitions. Word has length 57 [2020-08-21 18:09:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:03,255 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 417 transitions. [2020-08-21 18:09:03,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:09:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 417 transitions. [2020-08-21 18:09:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 18:09:03,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:03,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:03,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:09:03,260 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 410586329, now seen corresponding path program 1 times [2020-08-21 18:09:03,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:03,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032627194] [2020-08-21 18:09:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:03,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-21 18:09:03,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032627194] [2020-08-21 18:09:03,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:03,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:09:03,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037151072] [2020-08-21 18:09:03,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:09:03,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:03,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:09:03,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:09:03,375 INFO L87 Difference]: Start difference. First operand 285 states and 417 transitions. Second operand 5 states. [2020-08-21 18:09:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:03,561 INFO L93 Difference]: Finished difference Result 588 states and 861 transitions. [2020-08-21 18:09:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:09:03,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-08-21 18:09:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:03,564 INFO L225 Difference]: With dead ends: 588 [2020-08-21 18:09:03,564 INFO L226 Difference]: Without dead ends: 316 [2020-08-21 18:09:03,565 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 18:09:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-08-21 18:09:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2020-08-21 18:09:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-08-21 18:09:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 450 transitions. [2020-08-21 18:09:03,579 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 450 transitions. Word has length 67 [2020-08-21 18:09:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:03,580 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 450 transitions. [2020-08-21 18:09:03,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:09:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 450 transitions. [2020-08-21 18:09:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 18:09:03,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:03,585 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:03,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:09:03,585 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:03,586 INFO L82 PathProgramCache]: Analyzing trace with hash -206772919, now seen corresponding path program 1 times [2020-08-21 18:09:03,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:03,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649442278] [2020-08-21 18:09:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:03,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 18:09:03,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649442278] [2020-08-21 18:09:03,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:03,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:03,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543752865] [2020-08-21 18:09:03,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:03,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:03,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:03,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:03,655 INFO L87 Difference]: Start difference. First operand 310 states and 450 transitions. Second operand 3 states. [2020-08-21 18:09:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:03,954 INFO L93 Difference]: Finished difference Result 689 states and 1019 transitions. [2020-08-21 18:09:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:03,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-08-21 18:09:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:03,957 INFO L225 Difference]: With dead ends: 689 [2020-08-21 18:09:03,958 INFO L226 Difference]: Without dead ends: 367 [2020-08-21 18:09:03,959 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 18:09:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-08-21 18:09:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362. [2020-08-21 18:09:03,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-08-21 18:09:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 515 transitions. [2020-08-21 18:09:03,973 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 515 transitions. Word has length 77 [2020-08-21 18:09:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:03,973 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 515 transitions. [2020-08-21 18:09:03,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 515 transitions. [2020-08-21 18:09:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 18:09:03,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:03,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:03,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:09:03,976 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 67986695, now seen corresponding path program 1 times [2020-08-21 18:09:03,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:03,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409293195] [2020-08-21 18:09:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 18:09:04,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409293195] [2020-08-21 18:09:04,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:04,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:04,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200517585] [2020-08-21 18:09:04,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:04,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:04,028 INFO L87 Difference]: Start difference. First operand 362 states and 515 transitions. Second operand 3 states. [2020-08-21 18:09:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:04,198 INFO L93 Difference]: Finished difference Result 767 states and 1106 transitions. [2020-08-21 18:09:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:04,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-08-21 18:09:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:04,201 INFO L225 Difference]: With dead ends: 767 [2020-08-21 18:09:04,201 INFO L226 Difference]: Without dead ends: 401 [2020-08-21 18:09:04,203 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 18:09:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-08-21 18:09:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 396. [2020-08-21 18:09:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-08-21 18:09:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 559 transitions. [2020-08-21 18:09:04,217 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 559 transitions. Word has length 77 [2020-08-21 18:09:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:04,218 INFO L479 AbstractCegarLoop]: Abstraction has 396 states and 559 transitions. [2020-08-21 18:09:04,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 559 transitions. [2020-08-21 18:09:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 18:09:04,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:04,220 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:04,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:09:04,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1023176064, now seen corresponding path program 1 times [2020-08-21 18:09:04,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:04,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83556231] [2020-08-21 18:09:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-08-21 18:09:04,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83556231] [2020-08-21 18:09:04,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:04,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:04,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332266479] [2020-08-21 18:09:04,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:04,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:04,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:04,293 INFO L87 Difference]: Start difference. First operand 396 states and 559 transitions. Second operand 3 states. [2020-08-21 18:09:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:04,323 INFO L93 Difference]: Finished difference Result 785 states and 1109 transitions. [2020-08-21 18:09:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:04,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-08-21 18:09:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:04,326 INFO L225 Difference]: With dead ends: 785 [2020-08-21 18:09:04,326 INFO L226 Difference]: Without dead ends: 402 [2020-08-21 18:09:04,327 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 18:09:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-21 18:09:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 401. [2020-08-21 18:09:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-08-21 18:09:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 565 transitions. [2020-08-21 18:09:04,342 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 565 transitions. Word has length 79 [2020-08-21 18:09:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:04,342 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 565 transitions. [2020-08-21 18:09:04,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 565 transitions. [2020-08-21 18:09:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 18:09:04,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:04,344 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:04,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:09:04,345 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1094958026, now seen corresponding path program 1 times [2020-08-21 18:09:04,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:04,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686414781] [2020-08-21 18:09:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 18:09:04,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686414781] [2020-08-21 18:09:04,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:04,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 18:09:04,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146864504] [2020-08-21 18:09:04,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:09:04,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:09:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:09:04,404 INFO L87 Difference]: Start difference. First operand 401 states and 565 transitions. Second operand 4 states. [2020-08-21 18:09:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:04,672 INFO L93 Difference]: Finished difference Result 988 states and 1401 transitions. [2020-08-21 18:09:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:09:04,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-08-21 18:09:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:04,676 INFO L225 Difference]: With dead ends: 988 [2020-08-21 18:09:04,676 INFO L226 Difference]: Without dead ends: 555 [2020-08-21 18:09:04,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:09:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-08-21 18:09:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 451. [2020-08-21 18:09:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-08-21 18:09:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 638 transitions. [2020-08-21 18:09:04,702 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 638 transitions. Word has length 81 [2020-08-21 18:09:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:04,703 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 638 transitions. [2020-08-21 18:09:04,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:09:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 638 transitions. [2020-08-21 18:09:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 18:09:04,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:04,705 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-21 18:09:04,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:09:04,706 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1152174724, now seen corresponding path program 1 times [2020-08-21 18:09:04,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:04,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693755427] [2020-08-21 18:09:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 18:09:04,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693755427] [2020-08-21 18:09:04,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:04,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:04,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777632352] [2020-08-21 18:09:04,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:04,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:04,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:04,773 INFO L87 Difference]: Start difference. First operand 451 states and 638 transitions. Second operand 3 states. [2020-08-21 18:09:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:04,943 INFO L93 Difference]: Finished difference Result 936 states and 1328 transitions. [2020-08-21 18:09:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:04,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-08-21 18:09:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:04,949 INFO L225 Difference]: With dead ends: 936 [2020-08-21 18:09:04,949 INFO L226 Difference]: Without dead ends: 483 [2020-08-21 18:09:04,951 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 18:09:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-08-21 18:09:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 475. [2020-08-21 18:09:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-08-21 18:09:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 667 transitions. [2020-08-21 18:09:04,973 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 667 transitions. Word has length 84 [2020-08-21 18:09:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:04,974 INFO L479 AbstractCegarLoop]: Abstraction has 475 states and 667 transitions. [2020-08-21 18:09:04,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 667 transitions. [2020-08-21 18:09:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 18:09:04,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:04,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:04,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:09:04,976 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:04,977 INFO L82 PathProgramCache]: Analyzing trace with hash 404037349, now seen corresponding path program 1 times [2020-08-21 18:09:04,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:04,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643927583] [2020-08-21 18:09:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:05,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-08-21 18:09:05,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643927583] [2020-08-21 18:09:05,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:05,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:05,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22338203] [2020-08-21 18:09:05,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:05,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:05,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:05,088 INFO L87 Difference]: Start difference. First operand 475 states and 667 transitions. Second operand 3 states. [2020-08-21 18:09:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:05,238 INFO L93 Difference]: Finished difference Result 965 states and 1373 transitions. [2020-08-21 18:09:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:05,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-08-21 18:09:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:05,242 INFO L225 Difference]: With dead ends: 965 [2020-08-21 18:09:05,243 INFO L226 Difference]: Without dead ends: 484 [2020-08-21 18:09:05,244 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 18:09:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-08-21 18:09:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 469. [2020-08-21 18:09:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-08-21 18:09:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 651 transitions. [2020-08-21 18:09:05,261 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 651 transitions. Word has length 99 [2020-08-21 18:09:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:05,261 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 651 transitions. [2020-08-21 18:09:05,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 651 transitions. [2020-08-21 18:09:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-21 18:09:05,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:05,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:05,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:09:05,265 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:05,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1557981007, now seen corresponding path program 1 times [2020-08-21 18:09:05,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:05,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975829836] [2020-08-21 18:09:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:05,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-21 18:09:05,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975829836] [2020-08-21 18:09:05,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:05,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:05,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021473526] [2020-08-21 18:09:05,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:05,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:05,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:05,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:05,350 INFO L87 Difference]: Start difference. First operand 469 states and 651 transitions. Second operand 3 states. [2020-08-21 18:09:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:05,429 INFO L93 Difference]: Finished difference Result 1381 states and 1919 transitions. [2020-08-21 18:09:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:05,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-08-21 18:09:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:05,437 INFO L225 Difference]: With dead ends: 1381 [2020-08-21 18:09:05,438 INFO L226 Difference]: Without dead ends: 925 [2020-08-21 18:09:05,440 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 18:09:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-08-21 18:09:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 923. [2020-08-21 18:09:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2020-08-21 18:09:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1278 transitions. [2020-08-21 18:09:05,484 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1278 transitions. Word has length 107 [2020-08-21 18:09:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:05,488 INFO L479 AbstractCegarLoop]: Abstraction has 923 states and 1278 transitions. [2020-08-21 18:09:05,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1278 transitions. [2020-08-21 18:09:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-21 18:09:05,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:05,495 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:05,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:09:05,495 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2144787021, now seen corresponding path program 1 times [2020-08-21 18:09:05,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:05,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276432470] [2020-08-21 18:09:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:09:05,546 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:09:05,546 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:09:05,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:09:05,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:05 BoogieIcfgContainer [2020-08-21 18:09:05,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:09:05,621 INFO L168 Benchmark]: Toolchain (without parser) took 6100.76 ms. Allocated memory was 140.0 MB in the beginning and 287.8 MB in the end (delta: 147.8 MB). Free memory was 102.8 MB in the beginning and 139.1 MB in the end (delta: -36.3 MB). Peak memory consumption was 111.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:05,628 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-08-21 18:09:05,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.10 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.4 MB in the beginning and 177.4 MB in the end (delta: -75.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:05,630 INFO L168 Benchmark]: Boogie Preprocessor took 83.51 ms. Allocated memory is still 202.4 MB. Free memory was 177.4 MB in the beginning and 174.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:05,631 INFO L168 Benchmark]: RCFGBuilder took 917.67 ms. Allocated memory is still 202.4 MB. Free memory was 174.5 MB in the beginning and 120.8 MB in the end (delta: 53.8 MB). Peak memory consumption was 53.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:05,637 INFO L168 Benchmark]: TraceAbstraction took 4601.12 ms. Allocated memory was 202.4 MB in the beginning and 287.8 MB in the end (delta: 85.5 MB). Free memory was 119.8 MB in the beginning and 139.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:05,643 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 493.10 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.4 MB in the beginning and 177.4 MB in the end (delta: -75.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.51 ms. Allocated memory is still 202.4 MB. Free memory was 177.4 MB in the beginning and 174.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 917.67 ms. Allocated memory is still 202.4 MB. Free memory was 174.5 MB in the beginning and 120.8 MB in the end (delta: 53.8 MB). Peak memory consumption was 53.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4601.12 ms. Allocated memory was 202.4 MB in the beginning and 287.8 MB in the end (delta: 85.5 MB). Free memory was 119.8 MB in the beginning and 139.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 642]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L647] int s ; [L648] int tmp ; [L652] s = 8464 [L653] 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 ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength ; [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 = __VERIFIER_nondet_int() ; [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__state = initial_state [L73] blastFlag = 0 [L74] tmp = __VERIFIER_nondet_int() [L75] Time = tmp [L76] cb = 0 [L77] ret = -1 [L78] skip = 0 [L79] got_new_session = 0 [L80] COND TRUE s__info_callback != 0 [L81] cb = s__info_callback [L87] s__in_handshake ++ [L88] COND FALSE !(tmp___1 + 12288) [L93] COND FALSE !(s__cert == 0) [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND TRUE s__state == 8464 [L270] s__shutdown = 0 [L271] ret = __VERIFIER_nondet_int() [L272] COND TRUE blastFlag == 0 [L273] blastFlag = 1 [L275] COND FALSE !(ret <= 0) [L278] got_new_session = 1 [L279] s__state = 8496 [L280] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND TRUE s__state == 8496 [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 1 [L286] blastFlag = 2 [L288] COND FALSE !(ret <= 0) [L291] COND FALSE !(\read(s__hit)) [L294] s__state = 8512 [L296] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND TRUE s__state == 8512 [L301] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L302] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L303] COND TRUE __cil_tmp56 + 256UL [L304] skip = 1 [L315] s__state = 8528 [L316] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND FALSE !(s__state == 8512) [L142] COND FALSE !(s__state == 8513) [L145] COND TRUE s__state == 8528 [L320] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L321] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L323] __cil_tmp57 = (unsigned long )s__options [L324] COND TRUE __cil_tmp57 + 2097152UL [L325] s__s3__tmp__use_rsa_tmp = 1 [L330] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L357] ret = __VERIFIER_nondet_int() [L358] COND FALSE !(blastFlag == 6) [L361] COND FALSE !(ret <= 0) [L378] s__state = 8544 [L379] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND TRUE ! s__s3__tmp__reuse_message [L601] COND TRUE ! skip [L602] COND TRUE state == 8528 [L603] COND TRUE s__state == 8544 [L604] COND TRUE tmp___7 != 1024 [L605] COND TRUE tmp___7 != 512 [L606] COND TRUE __cil_tmp58 != 4294967294 [L607] COND TRUE l != 4294967266 [L642] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 161 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.4s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2670 SDtfs, 1939 SDslu, 2959 SDs, 0 SdLazy, 1406 SolverSat, 341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=923occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 341 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 950 NumberOfCodeBlocks, 950 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 831 ConstructedInterpolants, 0 QuantifiedInterpolants, 106011 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 10 PerfectInterpolantSequences, 421/425 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...