/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 false -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-eb0fd7c [2020-09-21 10:20:30,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:30,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:30,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:30,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:30,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:30,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:30,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:30,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:30,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:30,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:30,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:30,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:30,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:30,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:30,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:30,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:30,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:30,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:30,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:30,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:30,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:30,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:30,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:30,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:30,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:30,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:30,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:30,845 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 [2020-09-21 10:20:30,871 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:30,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:30,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:30,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:30,873 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:30,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:30,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:30,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:30,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:30,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:30,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:30,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:30,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:30,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:30,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:30,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:30,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:30,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:30,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:30,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:30,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:30,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:30,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:30,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:30,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:30,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:30,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:30,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:30,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:30,881 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 -> false [2020-09-21 10:20:31,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:31,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:31,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:31,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:31,365 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:31,367 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-2.c [2020-09-21 10:20:31,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9337a5aa9/1ee6943162774c51baf776cb8494e2aa/FLAGd0e76a9f8 [2020-09-21 10:20:32,064 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:32,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-2.c [2020-09-21 10:20:32,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9337a5aa9/1ee6943162774c51baf776cb8494e2aa/FLAGd0e76a9f8 [2020-09-21 10:20:32,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9337a5aa9/1ee6943162774c51baf776cb8494e2aa [2020-09-21 10:20:32,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:32,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:32,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:32,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:32,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:32,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:32,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6017e0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32, skipping insertion in model container [2020-09-21 10:20:32,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:32,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:32,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:32,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:32,775 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:32,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:32,941 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:32,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32 WrapperNode [2020-09-21 10:20:32,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:32,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:32,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:32,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:32,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:32,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:32,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:32,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:32,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:32,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:33,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (1/1) ... [2020-09-21 10:20:33,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:33,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:33,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:33,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:33,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (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 [2020-09-21 10:20:33,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:33,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:33,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-21 10:20:33,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:33,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:33,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:20:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-21 10:20:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-21 10:20:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:33,296 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:33,866 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-21 10:20:33,866 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-21 10:20:33,888 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:33,889 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:33,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:33 BoogieIcfgContainer [2020-09-21 10:20:33,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:33,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:33,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:33,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:33,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:32" (1/3) ... [2020-09-21 10:20:33,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bc5c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:33, skipping insertion in model container [2020-09-21 10:20:33,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:32" (2/3) ... [2020-09-21 10:20:33,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bc5c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:33, skipping insertion in model container [2020-09-21 10:20:33,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:33" (3/3) ... [2020-09-21 10:20:33,917 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_2.cil-2.c [2020-09-21 10:20:33,930 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:33,947 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:33,972 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:34,015 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:34,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:34,016 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:34,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:34,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:34,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:34,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:34,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-09-21 10:20:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 10:20:34,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:34,075 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] [2020-09-21 10:20:34,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1127072202, now seen corresponding path program 1 times [2020-09-21 10:20:34,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:34,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501424330] [2020-09-21 10:20:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:34,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501424330] [2020-09-21 10:20:34,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:34,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:34,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648525293] [2020-09-21 10:20:34,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:34,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:34,534 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 5 states. [2020-09-21 10:20:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:34,948 INFO L93 Difference]: Finished difference Result 311 states and 524 transitions. [2020-09-21 10:20:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:34,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-09-21 10:20:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:34,968 INFO L225 Difference]: With dead ends: 311 [2020-09-21 10:20:34,968 INFO L226 Difference]: Without dead ends: 154 [2020-09-21 10:20:34,974 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 [2020-09-21 10:20:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-21 10:20:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-09-21 10:20:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-21 10:20:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 224 transitions. [2020-09-21 10:20:35,043 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 224 transitions. Word has length 49 [2020-09-21 10:20:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,044 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 224 transitions. [2020-09-21 10:20:35,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 224 transitions. [2020-09-21 10:20:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:20:35,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,048 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] [2020-09-21 10:20:35,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:35,049 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,049 INFO L82 PathProgramCache]: Analyzing trace with hash -146505943, now seen corresponding path program 1 times [2020-09-21 10:20:35,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937252910] [2020-09-21 10:20:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:35,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937252910] [2020-09-21 10:20:35,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:35,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447030924] [2020-09-21 10:20:35,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:35,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:35,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:35,243 INFO L87 Difference]: Start difference. First operand 151 states and 224 transitions. Second operand 3 states. [2020-09-21 10:20:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,432 INFO L93 Difference]: Finished difference Result 315 states and 477 transitions. [2020-09-21 10:20:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:35,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-09-21 10:20:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,436 INFO L225 Difference]: With dead ends: 315 [2020-09-21 10:20:35,436 INFO L226 Difference]: Without dead ends: 177 [2020-09-21 10:20:35,438 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 [2020-09-21 10:20:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-21 10:20:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2020-09-21 10:20:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-21 10:20:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 250 transitions. [2020-09-21 10:20:35,454 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 250 transitions. Word has length 65 [2020-09-21 10:20:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,455 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 250 transitions. [2020-09-21 10:20:35,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 250 transitions. [2020-09-21 10:20:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 10:20:35,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,459 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] [2020-09-21 10:20:35,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:35,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1972825086, now seen corresponding path program 1 times [2020-09-21 10:20:35,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921251116] [2020-09-21 10:20:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-21 10:20:35,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921251116] [2020-09-21 10:20:35,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:35,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380671834] [2020-09-21 10:20:35,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:35,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:35,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:35,573 INFO L87 Difference]: Start difference. First operand 172 states and 250 transitions. Second operand 3 states. [2020-09-21 10:20:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,830 INFO L93 Difference]: Finished difference Result 377 states and 566 transitions. [2020-09-21 10:20:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:35,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-09-21 10:20:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,834 INFO L225 Difference]: With dead ends: 377 [2020-09-21 10:20:35,834 INFO L226 Difference]: Without dead ends: 218 [2020-09-21 10:20:35,836 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 [2020-09-21 10:20:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-21 10:20:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2020-09-21 10:20:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-21 10:20:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 297 transitions. [2020-09-21 10:20:35,853 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 297 transitions. Word has length 86 [2020-09-21 10:20:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,854 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 297 transitions. [2020-09-21 10:20:35,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 297 transitions. [2020-09-21 10:20:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 10:20:35,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,858 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] [2020-09-21 10:20:35,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:35,859 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2073995716, now seen corresponding path program 1 times [2020-09-21 10:20:35,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660885064] [2020-09-21 10:20:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-21 10:20:36,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660885064] [2020-09-21 10:20:36,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916003542] [2020-09-21 10:20:36,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,024 INFO L87 Difference]: Start difference. First operand 214 states and 297 transitions. Second operand 3 states. [2020-09-21 10:20:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,203 INFO L93 Difference]: Finished difference Result 442 states and 624 transitions. [2020-09-21 10:20:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-09-21 10:20:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,207 INFO L225 Difference]: With dead ends: 442 [2020-09-21 10:20:36,207 INFO L226 Difference]: Without dead ends: 241 [2020-09-21 10:20:36,209 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 [2020-09-21 10:20:36,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-21 10:20:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-09-21 10:20:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-09-21 10:20:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 325 transitions. [2020-09-21 10:20:36,245 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 325 transitions. Word has length 86 [2020-09-21 10:20:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,245 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 325 transitions. [2020-09-21 10:20:36,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 325 transitions. [2020-09-21 10:20:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-21 10:20:36,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,250 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] [2020-09-21 10:20:36,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:36,250 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1328327241, now seen corresponding path program 1 times [2020-09-21 10:20:36,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874721023] [2020-09-21 10:20:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-09-21 10:20:36,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874721023] [2020-09-21 10:20:36,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649881721] [2020-09-21 10:20:36,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,389 INFO L87 Difference]: Start difference. First operand 237 states and 325 transitions. Second operand 3 states. [2020-09-21 10:20:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,558 INFO L93 Difference]: Finished difference Result 499 states and 700 transitions. [2020-09-21 10:20:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-09-21 10:20:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,561 INFO L225 Difference]: With dead ends: 499 [2020-09-21 10:20:36,562 INFO L226 Difference]: Without dead ends: 275 [2020-09-21 10:20:36,565 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 [2020-09-21 10:20:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-21 10:20:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 262. [2020-09-21 10:20:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-09-21 10:20:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 355 transitions. [2020-09-21 10:20:36,589 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 355 transitions. Word has length 107 [2020-09-21 10:20:36,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,591 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 355 transitions. [2020-09-21 10:20:36,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 355 transitions. [2020-09-21 10:20:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-21 10:20:36,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,596 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] [2020-09-21 10:20:36,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:36,597 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1681254182, now seen corresponding path program 1 times [2020-09-21 10:20:36,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128826345] [2020-09-21 10:20:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:20:36,672 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:20:36,673 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:20:36,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:36,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:36 BoogieIcfgContainer [2020-09-21 10:20:36,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:36,736 INFO L168 Benchmark]: Toolchain (without parser) took 4369.15 ms. Allocated memory was 140.5 MB in the beginning and 245.4 MB in the end (delta: 104.9 MB). Free memory was 103.2 MB in the beginning and 202.6 MB in the end (delta: -99.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:36,737 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:20:36,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.64 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.6 MB in the beginning and 179.5 MB in the end (delta: -77.0 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:36,745 INFO L168 Benchmark]: Boogie Preprocessor took 61.78 ms. Allocated memory is still 204.5 MB. Free memory was 179.5 MB in the beginning and 176.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:36,746 INFO L168 Benchmark]: RCFGBuilder took 897.06 ms. Allocated memory is still 204.5 MB. Free memory was 176.6 MB in the beginning and 126.0 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:36,747 INFO L168 Benchmark]: TraceAbstraction took 2827.77 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 126.0 MB in the beginning and 202.6 MB in the end (delta: -76.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:36,760 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 573.64 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.6 MB in the beginning and 179.5 MB in the end (delta: -77.0 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.78 ms. Allocated memory is still 204.5 MB. Free memory was 179.5 MB in the beginning and 176.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 897.06 ms. Allocated memory is still 204.5 MB. Free memory was 176.6 MB in the beginning and 126.0 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2827.77 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 126.0 MB in the beginning and 202.6 MB in the end (delta: -76.6 MB). There was no memory consumed. 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: 2.6s, 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, 0.1s 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, 0.5s 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...