/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=SMALLEST --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_1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:43:59,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:43:59,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:43:59,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:43:59,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:43:59,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:43:59,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:43:59,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:43:59,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:43:59,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:43:59,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:43:59,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:43:59,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:43:59,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:43:59,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:43:59,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:43:59,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:43:59,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:43:59,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:43:59,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:43:59,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:43:59,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:43:59,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:43:59,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:43:59,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:43:59,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:43:59,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:43:59,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:43:59,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:43:59,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:43:59,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:43:59,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:43:59,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:43:59,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:43:59,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:43:59,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:43:59,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:43:59,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:43:59,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:43:59,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:43:59,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:43:59,107 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 15:43:59,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:43:59,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:43:59,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:43:59,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:43:59,132 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:43:59,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:43:59,133 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:43:59,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:43:59,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:43:59,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:43:59,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:43:59,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:43:59,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:43:59,134 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:43:59,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:43:59,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:43:59,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:43:59,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:43:59,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:43:59,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:43:59,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:43:59,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:43:59,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:43:59,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:43:59,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:43:59,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:43:59,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:43:59,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:43:59,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:43:59,137 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:43:59,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:43:59,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:43:59,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:43:59,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:43:59,514 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:43:59,514 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1.cil-1.c [2020-08-21 15:43:59,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f66d1c637/596996bac11c4721a0847924a767490e/FLAGfdadc6d2b [2020-08-21 15:44:00,059 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:44:00,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_1.cil-1.c [2020-08-21 15:44:00,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f66d1c637/596996bac11c4721a0847924a767490e/FLAGfdadc6d2b [2020-08-21 15:44:00,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f66d1c637/596996bac11c4721a0847924a767490e [2020-08-21 15:44:00,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:44:00,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:44:00,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:00,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:44:00,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:44:00,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612194b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00, skipping insertion in model container [2020-08-21 15:44:00,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:44:00,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:44:00,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:00,713 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:44:00,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:00,876 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:44:00,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00 WrapperNode [2020-08-21 15:44:00,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:00,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:44:00,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:44:00,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:44:00,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (1/1) ... [2020-08-21 15:44:00,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:44:00,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:44:00,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:44:00,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:44:00,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (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 15:44:01,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:44:01,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:44:01,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 15:44:01,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:44:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:44:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:44:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:44:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 15:44:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 15:44:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:44:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:44:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:44:01,245 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 15:44:01,834 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 15:44:01,834 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 15:44:01,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:44:01,846 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:44:01,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:01 BoogieIcfgContainer [2020-08-21 15:44:01,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:44:01,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:44:01,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:44:01,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:44:01,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:44:00" (1/3) ... [2020-08-21 15:44:01,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4716e500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:01, skipping insertion in model container [2020-08-21 15:44:01,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:00" (2/3) ... [2020-08-21 15:44:01,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4716e500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:01, skipping insertion in model container [2020-08-21 15:44:01,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:01" (3/3) ... [2020-08-21 15:44:01,862 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-1.c [2020-08-21 15:44:01,873 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:44:01,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:44:01,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:44:01,927 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:44:01,927 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:44:01,927 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:44:01,927 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:44:01,928 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:44:01,928 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:44:01,928 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:44:01,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:44:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states. [2020-08-21 15:44:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 15:44:01,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:01,961 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, 1] [2020-08-21 15:44:01,962 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash 281430660, now seen corresponding path program 1 times [2020-08-21 15:44:01,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:01,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809229140] [2020-08-21 15:44:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,335 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 15:44:02,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809229140] [2020-08-21 15:44:02,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:02,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:44:02,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320428058] [2020-08-21 15:44:02,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:44:02,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:02,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:44:02,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:44:02,367 INFO L87 Difference]: Start difference. First operand 151 states. Second operand 5 states. [2020-08-21 15:44:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:02,742 INFO L93 Difference]: Finished difference Result 315 states and 528 transitions. [2020-08-21 15:44:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:44:02,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-08-21 15:44:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:02,759 INFO L225 Difference]: With dead ends: 315 [2020-08-21 15:44:02,760 INFO L226 Difference]: Without dead ends: 156 [2020-08-21 15:44:02,769 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 15:44:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-21 15:44:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-08-21 15:44:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-21 15:44:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 227 transitions. [2020-08-21 15:44:02,836 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 227 transitions. Word has length 50 [2020-08-21 15:44:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:02,837 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 227 transitions. [2020-08-21 15:44:02,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:44:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 227 transitions. [2020-08-21 15:44:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 15:44:02,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:02,842 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, 1] [2020-08-21 15:44:02,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:44:02,842 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash 474837897, now seen corresponding path program 1 times [2020-08-21 15:44:02,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:02,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696732954] [2020-08-21 15:44:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:03,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696732954] [2020-08-21 15:44:03,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:03,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:03,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614719989] [2020-08-21 15:44:03,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:03,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:03,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:03,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:03,019 INFO L87 Difference]: Start difference. First operand 153 states and 227 transitions. Second operand 3 states. [2020-08-21 15:44:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:03,225 INFO L93 Difference]: Finished difference Result 318 states and 481 transitions. [2020-08-21 15:44:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:03,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-08-21 15:44:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:03,228 INFO L225 Difference]: With dead ends: 318 [2020-08-21 15:44:03,229 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 15:44:03,230 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 15:44:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 15:44:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-08-21 15:44:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-21 15:44:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 253 transitions. [2020-08-21 15:44:03,248 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 253 transitions. Word has length 66 [2020-08-21 15:44:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:03,249 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 253 transitions. [2020-08-21 15:44:03,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 253 transitions. [2020-08-21 15:44:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 15:44:03,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:03,253 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, 1] [2020-08-21 15:44:03,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:44:03,254 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:03,255 INFO L82 PathProgramCache]: Analyzing trace with hash 5421205, now seen corresponding path program 1 times [2020-08-21 15:44:03,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:03,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872993478] [2020-08-21 15:44:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 15:44:03,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872993478] [2020-08-21 15:44:03,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:03,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:03,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016361507] [2020-08-21 15:44:03,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:03,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:03,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:03,376 INFO L87 Difference]: Start difference. First operand 174 states and 253 transitions. Second operand 3 states. [2020-08-21 15:44:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:03,641 INFO L93 Difference]: Finished difference Result 381 states and 572 transitions. [2020-08-21 15:44:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:03,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-08-21 15:44:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:03,644 INFO L225 Difference]: With dead ends: 381 [2020-08-21 15:44:03,645 INFO L226 Difference]: Without dead ends: 220 [2020-08-21 15:44:03,646 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 15:44:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-21 15:44:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-08-21 15:44:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-21 15:44:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 300 transitions. [2020-08-21 15:44:03,662 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 300 transitions. Word has length 87 [2020-08-21 15:44:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:03,663 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 300 transitions. [2020-08-21 15:44:03,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 300 transitions. [2020-08-21 15:44:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 15:44:03,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:03,667 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, 1] [2020-08-21 15:44:03,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:44:03,668 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:03,668 INFO L82 PathProgramCache]: Analyzing trace with hash -891972073, now seen corresponding path program 1 times [2020-08-21 15:44:03,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:03,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873086270] [2020-08-21 15:44:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 15:44:03,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873086270] [2020-08-21 15:44:03,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:03,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:03,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046980889] [2020-08-21 15:44:03,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:03,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:03,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:03,806 INFO L87 Difference]: Start difference. First operand 216 states and 300 transitions. Second operand 3 states. [2020-08-21 15:44:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:03,945 INFO L93 Difference]: Finished difference Result 446 states and 630 transitions. [2020-08-21 15:44:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:03,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-08-21 15:44:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:03,948 INFO L225 Difference]: With dead ends: 446 [2020-08-21 15:44:03,948 INFO L226 Difference]: Without dead ends: 243 [2020-08-21 15:44:03,949 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 15:44:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-08-21 15:44:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2020-08-21 15:44:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-08-21 15:44:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 328 transitions. [2020-08-21 15:44:03,963 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 328 transitions. Word has length 87 [2020-08-21 15:44:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:03,963 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 328 transitions. [2020-08-21 15:44:03,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 328 transitions. [2020-08-21 15:44:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 15:44:03,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:03,965 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, 1] [2020-08-21 15:44:03,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:44:03,966 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1525903835, now seen corresponding path program 1 times [2020-08-21 15:44:03,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:03,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122989667] [2020-08-21 15:44:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-21 15:44:04,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122989667] [2020-08-21 15:44:04,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:04,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:04,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864987563] [2020-08-21 15:44:04,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:04,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:04,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:04,056 INFO L87 Difference]: Start difference. First operand 239 states and 328 transitions. Second operand 3 states. [2020-08-21 15:44:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:04,227 INFO L93 Difference]: Finished difference Result 503 states and 706 transitions. [2020-08-21 15:44:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:04,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-08-21 15:44:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:04,229 INFO L225 Difference]: With dead ends: 503 [2020-08-21 15:44:04,230 INFO L226 Difference]: Without dead ends: 277 [2020-08-21 15:44:04,231 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 15:44:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-21 15:44:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 264. [2020-08-21 15:44:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 15:44:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 358 transitions. [2020-08-21 15:44:04,242 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 358 transitions. Word has length 108 [2020-08-21 15:44:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:04,243 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 358 transitions. [2020-08-21 15:44:04,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 358 transitions. [2020-08-21 15:44:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 15:44:04,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:04,245 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, 1] [2020-08-21 15:44:04,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:44:04,246 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash 298054395, now seen corresponding path program 1 times [2020-08-21 15:44:04,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:04,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208211507] [2020-08-21 15:44:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:44:04,282 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:44:04,282 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:44:04,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:44:04,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:44:04 BoogieIcfgContainer [2020-08-21 15:44:04,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:44:04,331 INFO L168 Benchmark]: Toolchain (without parser) took 3962.36 ms. Allocated memory was 142.6 MB in the beginning and 242.7 MB in the end (delta: 100.1 MB). Free memory was 105.5 MB in the beginning and 186.9 MB in the end (delta: -81.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:04,332 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 15:44:04,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.25 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 105.3 MB in the beginning and 179.4 MB in the end (delta: -74.0 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:04,334 INFO L168 Benchmark]: Boogie Preprocessor took 70.79 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 176.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:04,335 INFO L168 Benchmark]: RCFGBuilder took 903.82 ms. Allocated memory is still 203.9 MB. Free memory was 176.8 MB in the beginning and 125.8 MB in the end (delta: 51.0 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:04,336 INFO L168 Benchmark]: TraceAbstraction took 2474.63 ms. Allocated memory was 203.9 MB in the beginning and 242.7 MB in the end (delta: 38.8 MB). Free memory was 125.8 MB in the beginning and 186.9 MB in the end (delta: -61.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:44:04,340 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 504.25 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 105.3 MB in the beginning and 179.4 MB in the end (delta: -74.0 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.79 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 176.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 903.82 ms. Allocated memory is still 203.9 MB. Free memory was 176.8 MB in the beginning and 125.8 MB in the end (delta: 51.0 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2474.63 ms. Allocated memory was 203.9 MB in the beginning and 242.7 MB in the end (delta: 38.8 MB). Free memory was 125.8 MB in the beginning and 186.9 MB in the end (delta: -61.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 611]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L616] int s ; [L617] int tmp ; [L621] s = 8464 [L622] 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 = __VERIFIER_nondet_int() ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp = __VERIFIER_nondet_long() ; [L45] int cb ; [L46] long num1 ; [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 ; [L55] int tmp___4 ; [L56] int tmp___5 ; [L57] int tmp___6 ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 ; [L61] int tmp___10 ; [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] 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 [L268] s__shutdown = 0 [L269] ret = __VERIFIER_nondet_int() [L270] COND TRUE blastFlag == 0 [L271] blastFlag = 1 [L273] COND FALSE !(ret <= 0) [L276] got_new_session = 1 [L277] s__state = 8496 [L278] s__init_num = 0 [L583] COND FALSE !(! s__s3__tmp__reuse_message) [L600] 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 [L282] ret = __VERIFIER_nondet_int() [L283] COND TRUE blastFlag == 1 [L284] blastFlag = 2 [L286] COND FALSE !(ret <= 0) [L289] COND TRUE \read(s__hit) [L290] s__state = 8656 [L294] s__init_num = 0 [L583] COND FALSE !(! s__s3__tmp__reuse_message) [L600] 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 FALSE !(s__state == 8528) [L148] COND FALSE !(s__state == 8529) [L151] COND FALSE !(s__state == 8544) [L154] COND FALSE !(s__state == 8545) [L157] COND FALSE !(s__state == 8560) [L160] COND FALSE !(s__state == 8561) [L163] COND FALSE !(s__state == 8448) [L166] COND FALSE !(s__state == 8576) [L169] COND FALSE !(s__state == 8577) [L172] COND FALSE !(s__state == 8592) [L175] COND FALSE !(s__state == 8593) [L178] COND FALSE !(s__state == 8608) [L181] COND FALSE !(s__state == 8609) [L184] COND FALSE !(s__state == 8640) [L187] COND FALSE !(s__state == 8641) [L190] COND TRUE s__state == 8656 [L488] s__session__cipher = s__s3__tmp__new_cipher [L489] tmp___9 = __VERIFIER_nondet_int() [L490] COND FALSE !(! tmp___9) [L494] ret = __VERIFIER_nondet_int() [L495] COND TRUE blastFlag == 2 [L496] blastFlag = 3 [L498] COND FALSE !(ret <= 0) [L501] s__state = 8672 [L502] s__init_num = 0 [L503] tmp___10 = __VERIFIER_nondet_int() [L504] COND FALSE !(! tmp___10) [L583] COND FALSE !(! s__s3__tmp__reuse_message) [L600] 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 FALSE !(s__state == 8528) [L148] COND FALSE !(s__state == 8529) [L151] COND FALSE !(s__state == 8544) [L154] COND FALSE !(s__state == 8545) [L157] COND FALSE !(s__state == 8560) [L160] COND FALSE !(s__state == 8561) [L163] COND FALSE !(s__state == 8448) [L166] COND FALSE !(s__state == 8576) [L169] COND FALSE !(s__state == 8577) [L172] COND FALSE !(s__state == 8592) [L175] COND FALSE !(s__state == 8593) [L178] COND FALSE !(s__state == 8608) [L181] COND FALSE !(s__state == 8609) [L184] COND FALSE !(s__state == 8640) [L187] COND FALSE !(s__state == 8641) [L190] COND FALSE !(s__state == 8656) [L193] COND FALSE !(s__state == 8657) [L196] COND TRUE s__state == 8672 [L511] ret = __VERIFIER_nondet_int() [L512] COND FALSE !(blastFlag == 4) [L515] COND TRUE blastFlag == 3 [L611] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 151 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1070 SDtfs, 361 SDslu, 825 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=264occurred 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, 28 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 525 NumberOfCodeBlocks, 525 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 393 ConstructedInterpolants, 0 QuantifiedInterpolants, 53685 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...