/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:55:17,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:55:17,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:55:17,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:55:17,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:55:17,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:55:17,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:55:17,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:55:17,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:55:17,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:55:17,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:55:17,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:55:17,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:55:17,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:55:17,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:55:17,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:55:17,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:55:17,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:55:17,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:55:17,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:55:17,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:55:17,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:55:17,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:55:17,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:55:17,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:55:17,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:55:17,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:55:17,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:55:17,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:55:17,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:55:17,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:55:17,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:55:17,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:55:17,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:55:17,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:55:17,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:55:17,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:55:17,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:55:17,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:55:17,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:55:17,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:55:17,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:55:17,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:55:17,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:55:17,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:55:17,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:55:17,874 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:55:17,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:55:17,875 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:55:17,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:55:17,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:55:17,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:55:17,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:55:17,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:55:17,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:55:17,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:55:17,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:55:17,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:55:17,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:55:17,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:55:17,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:55:17,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:55:17,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:55:17,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:17,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:55:17,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:55:17,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:55:17,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:55:17,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:55:17,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:55:17,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:55:17,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:55:18,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:55:18,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:55:18,188 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:55:18,189 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:55:18,190 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:55:18,190 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-2.c [2020-08-18 21:55:18,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a22f7dc1f/c0a9f7b6f6f94c49996ed9e9b7ba4446/FLAG344ef97a4 [2020-08-18 21:55:18,814 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:55:18,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-2.c [2020-08-18 21:55:18,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a22f7dc1f/c0a9f7b6f6f94c49996ed9e9b7ba4446/FLAG344ef97a4 [2020-08-18 21:55:19,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a22f7dc1f/c0a9f7b6f6f94c49996ed9e9b7ba4446 [2020-08-18 21:55:19,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:55:19,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:55:19,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:19,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:55:19,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:55:19,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19, skipping insertion in model container [2020-08-18 21:55:19,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:55:19,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:55:19,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:19,542 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:55:19,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:19,778 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:55:19,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19 WrapperNode [2020-08-18 21:55:19,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:19,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:55:19,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:55:19,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:55:19,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:55:19,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:55:19,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:55:19,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:55:19,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:19,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:55:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:55:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 21:55:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:55:19,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:55:19,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 21:55:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:55:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 21:55:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 21:55:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:55:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:55:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:55:20,133 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 21:55:20,706 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 21:55:20,706 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 21:55:20,719 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:55:20,720 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:55:20,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:20 BoogieIcfgContainer [2020-08-18 21:55:20,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:55:20,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:55:20,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:55:20,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:55:20,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:55:19" (1/3) ... [2020-08-18 21:55:20,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636a75bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:20, skipping insertion in model container [2020-08-18 21:55:20,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (2/3) ... [2020-08-18 21:55:20,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636a75bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:20, skipping insertion in model container [2020-08-18 21:55:20,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:20" (3/3) ... [2020-08-18 21:55:20,736 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_2.cil-2.c [2020-08-18 21:55:20,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:55:20,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:55:20,774 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:55:20,807 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:55:20,807 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:55:20,808 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:55:20,808 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:55:20,808 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:55:20,808 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:55:20,809 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:55:20,809 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:55:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-08-18 21:55:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 21:55:20,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:20,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:20,865 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1127072202, now seen corresponding path program 1 times [2020-08-18 21:55:20,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:20,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356917142] [2020-08-18 21:55:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356917142] [2020-08-18 21:55:21,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:55:21,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568149800] [2020-08-18 21:55:21,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:55:21,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:55:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:55:21,324 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 5 states. [2020-08-18 21:55:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,694 INFO L93 Difference]: Finished difference Result 311 states and 524 transitions. [2020-08-18 21:55:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:55:21,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-08-18 21:55:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,711 INFO L225 Difference]: With dead ends: 311 [2020-08-18 21:55:21,711 INFO L226 Difference]: Without dead ends: 154 [2020-08-18 21:55:21,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:55:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-18 21:55:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-08-18 21:55:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-08-18 21:55:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 224 transitions. [2020-08-18 21:55:21,776 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 224 transitions. Word has length 49 [2020-08-18 21:55:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,777 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 224 transitions. [2020-08-18 21:55:21,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:55:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 224 transitions. [2020-08-18 21:55:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 21:55:21,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:21,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:55:21,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,782 INFO L82 PathProgramCache]: Analyzing trace with hash -146505943, now seen corresponding path program 1 times [2020-08-18 21:55:21,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353531402] [2020-08-18 21:55:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353531402] [2020-08-18 21:55:21,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328532104] [2020-08-18 21:55:21,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,886 INFO L87 Difference]: Start difference. First operand 151 states and 224 transitions. Second operand 3 states. [2020-08-18 21:55:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,079 INFO L93 Difference]: Finished difference Result 315 states and 477 transitions. [2020-08-18 21:55:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-08-18 21:55:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,082 INFO L225 Difference]: With dead ends: 315 [2020-08-18 21:55:22,082 INFO L226 Difference]: Without dead ends: 177 [2020-08-18 21:55:22,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-18 21:55:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2020-08-18 21:55:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-08-18 21:55:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 250 transitions. [2020-08-18 21:55:22,102 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 250 transitions. Word has length 65 [2020-08-18 21:55:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,102 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 250 transitions. [2020-08-18 21:55:22,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 250 transitions. [2020-08-18 21:55:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 21:55:22,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,105 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:22,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:55:22,106 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1972825086, now seen corresponding path program 1 times [2020-08-18 21:55:22,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359714461] [2020-08-18 21:55:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 21:55:22,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359714461] [2020-08-18 21:55:22,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854269959] [2020-08-18 21:55:22,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,220 INFO L87 Difference]: Start difference. First operand 172 states and 250 transitions. Second operand 3 states. [2020-08-18 21:55:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,491 INFO L93 Difference]: Finished difference Result 377 states and 566 transitions. [2020-08-18 21:55:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-08-18 21:55:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,494 INFO L225 Difference]: With dead ends: 377 [2020-08-18 21:55:22,495 INFO L226 Difference]: Without dead ends: 218 [2020-08-18 21:55:22,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-18 21:55:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2020-08-18 21:55:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-18 21:55:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 297 transitions. [2020-08-18 21:55:22,512 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 297 transitions. Word has length 86 [2020-08-18 21:55:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,513 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 297 transitions. [2020-08-18 21:55:22,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 297 transitions. [2020-08-18 21:55:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 21:55:22,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,516 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:22,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:55:22,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2073995716, now seen corresponding path program 1 times [2020-08-18 21:55:22,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994172348] [2020-08-18 21:55:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 21:55:22,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994172348] [2020-08-18 21:55:22,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530936866] [2020-08-18 21:55:22,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,622 INFO L87 Difference]: Start difference. First operand 214 states and 297 transitions. Second operand 3 states. [2020-08-18 21:55:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,813 INFO L93 Difference]: Finished difference Result 442 states and 624 transitions. [2020-08-18 21:55:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-08-18 21:55:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,818 INFO L225 Difference]: With dead ends: 442 [2020-08-18 21:55:22,819 INFO L226 Difference]: Without dead ends: 241 [2020-08-18 21:55:22,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-18 21:55:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-08-18 21:55:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-18 21:55:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 325 transitions. [2020-08-18 21:55:22,851 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 325 transitions. Word has length 86 [2020-08-18 21:55:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,853 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 325 transitions. [2020-08-18 21:55:22,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 325 transitions. [2020-08-18 21:55:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 21:55:22,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,856 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-08-18 21:55:22,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:55:22,856 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1328327241, now seen corresponding path program 1 times [2020-08-18 21:55:22,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701709164] [2020-08-18 21:55:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-18 21:55:22,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701709164] [2020-08-18 21:55:22,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906826639] [2020-08-18 21:55:22,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,998 INFO L87 Difference]: Start difference. First operand 237 states and 325 transitions. Second operand 3 states. [2020-08-18 21:55:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:23,177 INFO L93 Difference]: Finished difference Result 499 states and 700 transitions. [2020-08-18 21:55:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:23,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-08-18 21:55:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:23,180 INFO L225 Difference]: With dead ends: 499 [2020-08-18 21:55:23,181 INFO L226 Difference]: Without dead ends: 275 [2020-08-18 21:55:23,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-08-18 21:55:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 262. [2020-08-18 21:55:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-18 21:55:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 355 transitions. [2020-08-18 21:55:23,201 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 355 transitions. Word has length 107 [2020-08-18 21:55:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:23,204 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 355 transitions. [2020-08-18 21:55:23,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 355 transitions. [2020-08-18 21:55:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 21:55:23,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:23,208 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-08-18 21:55:23,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:55:23,208 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1681254182, now seen corresponding path program 1 times [2020-08-18 21:55:23,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:23,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945955161] [2020-08-18 21:55:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:55:23,278 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:55:23,279 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:55:23,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:55:23,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:55:23 BoogieIcfgContainer [2020-08-18 21:55:23,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:55:23,334 INFO L168 Benchmark]: Toolchain (without parser) took 4146.84 ms. Allocated memory was 146.8 MB in the beginning and 246.4 MB in the end (delta: 99.6 MB). Free memory was 102.7 MB in the beginning and 208.5 MB in the end (delta: -105.7 MB). Peak memory consumption was 109.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:23,335 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:55:23,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 591.79 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 102.5 MB in the beginning and 178.0 MB in the end (delta: -75.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:23,336 INFO L168 Benchmark]: Boogie Preprocessor took 56.70 ms. Allocated memory is still 203.4 MB. Free memory was 178.0 MB in the beginning and 175.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:23,337 INFO L168 Benchmark]: RCFGBuilder took 890.47 ms. Allocated memory is still 203.4 MB. Free memory was 175.3 MB in the beginning and 124.7 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:23,338 INFO L168 Benchmark]: TraceAbstraction took 2602.67 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 124.1 MB in the beginning and 208.5 MB in the end (delta: -84.4 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:23,342 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 591.79 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 102.5 MB in the beginning and 178.0 MB in the end (delta: -75.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.70 ms. Allocated memory is still 203.4 MB. Free memory was 178.0 MB in the beginning and 175.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 890.47 ms. Allocated memory is still 203.4 MB. Free memory was 175.3 MB in the beginning and 124.7 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2602.67 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 124.1 MB in the beginning and 208.5 MB in the end (delta: -84.4 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 607]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L612] int s ; [L613] int tmp ; [L617] s = 8464 [L618] 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 = __VERIFIER_nondet_int() ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND FALSE !(tmp___1 + 12288) [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L579] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L293] COND FALSE !(ret <= 0) [L296] COND TRUE \read(s__hit) [L297] s__state = 8656 [L301] s__init_num = 0 [L579] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND FALSE !(s__state == 8496) [L137] COND FALSE !(s__state == 8497) [L140] COND FALSE !(s__state == 8512) [L143] COND FALSE !(s__state == 8513) [L146] COND FALSE !(s__state == 8528) [L149] COND FALSE !(s__state == 8529) [L152] COND FALSE !(s__state == 8544) [L155] COND FALSE !(s__state == 8545) [L158] COND FALSE !(s__state == 8560) [L161] COND FALSE !(s__state == 8561) [L164] COND FALSE !(s__state == 8448) [L167] COND FALSE !(s__state == 8576) [L170] COND FALSE !(s__state == 8577) [L173] COND FALSE !(s__state == 8592) [L176] COND FALSE !(s__state == 8593) [L179] COND FALSE !(s__state == 8608) [L182] COND FALSE !(s__state == 8609) [L185] COND FALSE !(s__state == 8640) [L188] COND FALSE !(s__state == 8641) [L191] COND TRUE s__state == 8656 [L490] s__session__cipher = s__s3__tmp__new_cipher [L491] COND FALSE !(! tmp___9) [L495] ret = __VERIFIER_nondet_int() [L496] COND TRUE blastFlag == 2 [L497] blastFlag = 3 [L499] COND FALSE !(ret <= 0) [L502] s__state = 8672 [L503] s__init_num = 0 [L504] COND FALSE !(! tmp___10) [L579] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND FALSE !(s__state == 8496) [L137] COND FALSE !(s__state == 8497) [L140] COND FALSE !(s__state == 8512) [L143] COND FALSE !(s__state == 8513) [L146] COND FALSE !(s__state == 8528) [L149] COND FALSE !(s__state == 8529) [L152] COND FALSE !(s__state == 8544) [L155] COND FALSE !(s__state == 8545) [L158] COND FALSE !(s__state == 8560) [L161] COND FALSE !(s__state == 8561) [L164] COND FALSE !(s__state == 8448) [L167] COND FALSE !(s__state == 8576) [L170] COND FALSE !(s__state == 8577) [L173] COND FALSE !(s__state == 8592) [L176] COND FALSE !(s__state == 8593) [L179] COND FALSE !(s__state == 8608) [L182] COND FALSE !(s__state == 8609) [L185] COND FALSE !(s__state == 8640) [L188] COND FALSE !(s__state == 8641) [L191] COND FALSE !(s__state == 8656) [L194] COND FALSE !(s__state == 8657) [L197] COND TRUE s__state == 8672 [L511] ret = __VERIFIER_nondet_int() [L512] COND TRUE blastFlag == 3 [L607] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 149 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1056 SDtfs, 361 SDslu, 809 SDs, 0 SdLazy, 580 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 29 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 519 NumberOfCodeBlocks, 519 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 52620 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 170/170 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...