/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:00:29,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:00:29,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:00:29,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:00:29,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:00:29,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:00:29,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:00:29,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:00:29,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:00:29,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:00:29,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:00:29,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:00:29,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:00:29,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:00:29,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:00:29,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:00:29,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:00:29,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:00:29,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:00:29,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:00:29,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:00:29,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:00:29,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:00:29,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:00:29,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:00:29,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:00:29,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:00:29,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:00:29,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:00:29,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:00:29,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:00:29,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:00:29,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:00:29,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:00:29,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:00:29,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:00:29,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:00:29,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:00:29,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:00:29,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:00:29,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:00:29,132 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 [2020-08-19 06:00:29,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:00:29,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:00:29,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:00:29,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:00:29,157 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:00:29,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:00:29,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:00:29,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:00:29,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:00:29,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:00:29,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:00:29,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:00:29,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:00:29,159 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:00:29,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:00:29,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:00:29,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:00:29,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:00:29,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:00:29,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:00:29,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:00:29,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:00:29,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:00:29,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:00:29,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:00:29,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:00:29,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:00:29,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:00:29,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:00:29,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 06:00:29,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:00:29,499 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:00:29,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:00:29,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:00:29,507 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:00:29,508 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-19 06:00:29,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83581a0b9/62ed33b3029448dbb51a114dca3fd798/FLAG7daef7240 [2020-08-19 06:00:30,052 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:00:30,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-19 06:00:30,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83581a0b9/62ed33b3029448dbb51a114dca3fd798/FLAG7daef7240 [2020-08-19 06:00:30,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83581a0b9/62ed33b3029448dbb51a114dca3fd798 [2020-08-19 06:00:30,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:00:30,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:00:30,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:00:30,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:00:30,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:00:30,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:30,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1c9f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30, skipping insertion in model container [2020-08-19 06:00:30,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:30,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:00:30,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:00:30,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:00:30,773 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:00:30,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:00:30,962 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:00:30,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30 WrapperNode [2020-08-19 06:00:30,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:00:30,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:00:30,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:00:30,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:00:30,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:30,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:30,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:30,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:31,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:31,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:31,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (1/1) ... [2020-08-19 06:00:31,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:00:31,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:00:31,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:00:31,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:00:31,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (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 [2020-08-19 06:00:31,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:00:31,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:00:31,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-19 06:00:31,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:00:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:00:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 06:00:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:00:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-19 06:00:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-19 06:00:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:00:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:00:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:00:31,344 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-19 06:00:31,902 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-19 06:00:31,903 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-19 06:00:31,915 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:00:31,915 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:00:31,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:31 BoogieIcfgContainer [2020-08-19 06:00:31,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:00:31,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:00:31,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:00:31,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:00:31,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:00:30" (1/3) ... [2020-08-19 06:00:31,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c912444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:31, skipping insertion in model container [2020-08-19 06:00:31,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:30" (2/3) ... [2020-08-19 06:00:31,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c912444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:31, skipping insertion in model container [2020-08-19 06:00:31,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:31" (3/3) ... [2020-08-19 06:00:31,931 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-19 06:00:31,943 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:00:31,952 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:00:31,966 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:00:31,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:00:31,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:00:31,994 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:00:31,995 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:00:31,995 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:00:31,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:00:31,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:00:31,995 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:00:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-19 06:00:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:00:32,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:32,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:32,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:32,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-19 06:00:32,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:32,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063091362] [2020-08-19 06:00:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:32,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:32,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063091362] [2020-08-19 06:00:32,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:32,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:00:32,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207723670] [2020-08-19 06:00:32,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:00:32,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:32,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:00:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:00:32,359 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-19 06:00:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:32,823 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-19 06:00:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:00:32,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-19 06:00:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:32,841 INFO L225 Difference]: With dead ends: 375 [2020-08-19 06:00:32,841 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 06:00:32,847 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 [2020-08-19 06:00:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 06:00:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-19 06:00:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-19 06:00:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-19 06:00:32,911 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-19 06:00:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:32,911 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-19 06:00:32,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:00:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-19 06:00:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:00:32,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:32,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:32,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:00:32,914 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-19 06:00:32,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:32,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78599649] [2020-08-19 06:00:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:33,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:33,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78599649] [2020-08-19 06:00:33,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:33,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:00:33,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733113020] [2020-08-19 06:00:33,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:00:33,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:00:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:00:33,013 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-19 06:00:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:33,343 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-19 06:00:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:00:33,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-19 06:00:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:33,349 INFO L225 Difference]: With dead ends: 448 [2020-08-19 06:00:33,350 INFO L226 Difference]: Without dead ends: 260 [2020-08-19 06:00:33,354 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 [2020-08-19 06:00:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-19 06:00:33,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-19 06:00:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-19 06:00:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-19 06:00:33,406 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-19 06:00:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:33,406 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-19 06:00:33,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:00:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-19 06:00:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 06:00:33,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:33,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:33,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:00:33,412 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-19 06:00:33,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:33,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950624603] [2020-08-19 06:00:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:33,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:33,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950624603] [2020-08-19 06:00:33,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:33,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:33,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323648131] [2020-08-19 06:00:33,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:33,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:33,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:33,534 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-19 06:00:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:33,572 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-19 06:00:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:33,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-19 06:00:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:33,576 INFO L225 Difference]: With dead ends: 698 [2020-08-19 06:00:33,577 INFO L226 Difference]: Without dead ends: 466 [2020-08-19 06:00:33,579 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 [2020-08-19 06:00:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-19 06:00:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-19 06:00:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-19 06:00:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-19 06:00:33,610 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-19 06:00:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:33,610 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-19 06:00:33,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-19 06:00:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 06:00:33,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:33,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:33,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:00:33,613 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:33,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-19 06:00:33,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:33,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734743011] [2020-08-19 06:00:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:33,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:33,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734743011] [2020-08-19 06:00:33,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:33,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:00:33,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081320012] [2020-08-19 06:00:33,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:00:33,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:00:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:00:33,770 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-19 06:00:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:34,131 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-19 06:00:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:00:34,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-19 06:00:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:34,138 INFO L225 Difference]: With dead ends: 1155 [2020-08-19 06:00:34,139 INFO L226 Difference]: Without dead ends: 655 [2020-08-19 06:00:34,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:00:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-19 06:00:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-19 06:00:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-19 06:00:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-19 06:00:34,176 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-19 06:00:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:34,176 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-19 06:00:34,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:00:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-19 06:00:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 06:00:34,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:34,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:34,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:00:34,186 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:34,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-19 06:00:34,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:34,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758533403] [2020-08-19 06:00:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:34,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758533403] [2020-08-19 06:00:34,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:34,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:34,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566306140] [2020-08-19 06:00:34,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:34,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:34,279 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-19 06:00:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:34,302 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-19 06:00:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:34,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-19 06:00:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:34,306 INFO L225 Difference]: With dead ends: 1038 [2020-08-19 06:00:34,306 INFO L226 Difference]: Without dead ends: 526 [2020-08-19 06:00:34,308 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 [2020-08-19 06:00:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-19 06:00:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-19 06:00:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-19 06:00:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-19 06:00:34,331 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-19 06:00:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:34,333 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-19 06:00:34,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-19 06:00:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 06:00:34,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:34,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:34,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:00:34,337 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:34,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:34,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-19 06:00:34,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:34,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6631774] [2020-08-19 06:00:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:34,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6631774] [2020-08-19 06:00:34,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:34,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:34,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507350921] [2020-08-19 06:00:34,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:34,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:34,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:34,435 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-19 06:00:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:34,482 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-19 06:00:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:34,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-19 06:00:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:34,486 INFO L225 Difference]: With dead ends: 1048 [2020-08-19 06:00:34,487 INFO L226 Difference]: Without dead ends: 536 [2020-08-19 06:00:34,489 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 [2020-08-19 06:00:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-19 06:00:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-19 06:00:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-19 06:00:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-19 06:00:34,521 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-19 06:00:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:34,521 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-19 06:00:34,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-19 06:00:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 06:00:34,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:34,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:34,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:00:34,524 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-19 06:00:34,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:34,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584095267] [2020-08-19 06:00:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:34,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584095267] [2020-08-19 06:00:34,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:34,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:34,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189412768] [2020-08-19 06:00:34,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:34,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:34,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:34,596 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-19 06:00:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:34,857 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-19 06:00:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:34,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-19 06:00:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:34,861 INFO L225 Difference]: With dead ends: 1234 [2020-08-19 06:00:34,862 INFO L226 Difference]: Without dead ends: 670 [2020-08-19 06:00:34,864 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 [2020-08-19 06:00:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-19 06:00:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-19 06:00:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-19 06:00:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-19 06:00:34,897 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-19 06:00:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:34,898 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-19 06:00:34,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-19 06:00:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 06:00:34,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:34,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:34,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:00:34,901 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-19 06:00:34,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:34,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500260603] [2020-08-19 06:00:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:34,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500260603] [2020-08-19 06:00:34,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:34,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:34,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725826643] [2020-08-19 06:00:34,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:34,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:34,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:34,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:34,984 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-19 06:00:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:35,044 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-19 06:00:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:35,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-19 06:00:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:35,055 INFO L225 Difference]: With dead ends: 1720 [2020-08-19 06:00:35,055 INFO L226 Difference]: Without dead ends: 1149 [2020-08-19 06:00:35,057 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 [2020-08-19 06:00:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-19 06:00:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-19 06:00:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-19 06:00:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-19 06:00:35,106 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-19 06:00:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:35,106 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-19 06:00:35,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-19 06:00:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 06:00:35,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:35,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:35,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:00:35,108 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-19 06:00:35,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:35,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019597971] [2020-08-19 06:00:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:35,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:35,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019597971] [2020-08-19 06:00:35,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:35,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:35,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565326571] [2020-08-19 06:00:35,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:35,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:35,164 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-19 06:00:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:35,233 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-19 06:00:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:35,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-19 06:00:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:35,245 INFO L225 Difference]: With dead ends: 2602 [2020-08-19 06:00:35,246 INFO L226 Difference]: Without dead ends: 1734 [2020-08-19 06:00:35,248 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 [2020-08-19 06:00:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-19 06:00:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-19 06:00:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-19 06:00:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-19 06:00:35,352 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-19 06:00:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:35,352 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-19 06:00:35,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-19 06:00:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 06:00:35,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:35,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:35,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:00:35,354 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:35,355 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-19 06:00:35,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:35,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023787634] [2020-08-19 06:00:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:35,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:35,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023787634] [2020-08-19 06:00:35,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:35,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:35,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040318926] [2020-08-19 06:00:35,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:35,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:35,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:35,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:35,404 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-19 06:00:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:35,597 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-19 06:00:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:35,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-19 06:00:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:35,607 INFO L225 Difference]: With dead ends: 3635 [2020-08-19 06:00:35,608 INFO L226 Difference]: Without dead ends: 1924 [2020-08-19 06:00:35,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-19 06:00:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-19 06:00:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 06:00:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-19 06:00:35,685 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-19 06:00:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:35,685 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-19 06:00:35,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-19 06:00:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 06:00:35,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:35,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:35,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:00:35,688 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-19 06:00:35,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:35,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317016518] [2020-08-19 06:00:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:35,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:35,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317016518] [2020-08-19 06:00:35,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:35,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:35,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216925224] [2020-08-19 06:00:35,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:35,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:35,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:35,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:35,746 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-19 06:00:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:35,980 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-19 06:00:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:35,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-19 06:00:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:35,992 INFO L225 Difference]: With dead ends: 3747 [2020-08-19 06:00:35,992 INFO L226 Difference]: Without dead ends: 1933 [2020-08-19 06:00:35,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-19 06:00:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-19 06:00:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 06:00:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-19 06:00:36,129 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-19 06:00:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:36,129 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-19 06:00:36,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-19 06:00:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 06:00:36,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:36,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:36,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:00:36,132 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:36,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-19 06:00:36,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:36,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308942769] [2020-08-19 06:00:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:36,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:36,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308942769] [2020-08-19 06:00:36,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:36,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:36,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673380891] [2020-08-19 06:00:36,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:36,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:36,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:36,185 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-19 06:00:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:36,411 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-19 06:00:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:36,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-19 06:00:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:36,420 INFO L225 Difference]: With dead ends: 3744 [2020-08-19 06:00:36,420 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 06:00:36,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 06:00:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-19 06:00:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 06:00:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-19 06:00:36,493 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-19 06:00:36,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:36,493 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-19 06:00:36,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-19 06:00:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 06:00:36,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:36,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:36,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:00:36,495 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:36,496 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-19 06:00:36,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:36,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554404057] [2020-08-19 06:00:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:36,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:36,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554404057] [2020-08-19 06:00:36,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:36,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:36,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719506216] [2020-08-19 06:00:36,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:36,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:36,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:36,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:36,536 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-19 06:00:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:36,736 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-19 06:00:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:36,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-19 06:00:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:36,745 INFO L225 Difference]: With dead ends: 3741 [2020-08-19 06:00:36,745 INFO L226 Difference]: Without dead ends: 1891 [2020-08-19 06:00:36,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-19 06:00:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-19 06:00:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-19 06:00:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-19 06:00:36,860 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-19 06:00:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:36,861 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-19 06:00:36,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-19 06:00:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:00:36,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:36,862 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:36,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:00:36,863 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-19 06:00:36,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:36,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060713331] [2020-08-19 06:00:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:36,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:36,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060713331] [2020-08-19 06:00:36,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:36,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:36,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238673377] [2020-08-19 06:00:36,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:36,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:36,903 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-19 06:00:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:37,145 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-19 06:00:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:37,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-19 06:00:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:37,158 INFO L225 Difference]: With dead ends: 3810 [2020-08-19 06:00:37,158 INFO L226 Difference]: Without dead ends: 1960 [2020-08-19 06:00:37,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-19 06:00:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-19 06:00:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-19 06:00:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-19 06:00:37,259 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-19 06:00:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:37,260 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-19 06:00:37,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-19 06:00:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 06:00:37,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:37,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:37,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:00:37,262 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-19 06:00:37,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:37,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119536676] [2020-08-19 06:00:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:37,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:37,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119536676] [2020-08-19 06:00:37,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:37,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:37,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407435084] [2020-08-19 06:00:37,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:37,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:37,335 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-19 06:00:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:37,618 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-19 06:00:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:37,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-19 06:00:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:37,629 INFO L225 Difference]: With dead ends: 3946 [2020-08-19 06:00:37,630 INFO L226 Difference]: Without dead ends: 2096 [2020-08-19 06:00:37,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-19 06:00:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-19 06:00:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-19 06:00:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-19 06:00:37,765 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-19 06:00:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:37,766 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-19 06:00:37,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-19 06:00:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 06:00:37,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:37,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:37,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:00:37,769 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-19 06:00:37,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:37,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502363372] [2020-08-19 06:00:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:37,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-19 06:00:37,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502363372] [2020-08-19 06:00:37,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:37,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:37,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218541638] [2020-08-19 06:00:37,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:37,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:37,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:37,832 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-19 06:00:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:38,214 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-19 06:00:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:38,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-19 06:00:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:38,229 INFO L225 Difference]: With dead ends: 4276 [2020-08-19 06:00:38,230 INFO L226 Difference]: Without dead ends: 2293 [2020-08-19 06:00:38,236 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 [2020-08-19 06:00:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-19 06:00:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-19 06:00:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-19 06:00:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-19 06:00:38,355 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-19 06:00:38,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:38,356 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-19 06:00:38,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-19 06:00:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 06:00:38,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:38,359 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:38,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:00:38,359 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-19 06:00:38,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:38,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758639182] [2020-08-19 06:00:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:38,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 06:00:38,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758639182] [2020-08-19 06:00:38,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:38,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:38,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51294763] [2020-08-19 06:00:38,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:38,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:38,457 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-19 06:00:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:38,569 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-19 06:00:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:38,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-19 06:00:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:38,588 INFO L225 Difference]: With dead ends: 4420 [2020-08-19 06:00:38,588 INFO L226 Difference]: Without dead ends: 2947 [2020-08-19 06:00:38,594 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 [2020-08-19 06:00:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-19 06:00:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-19 06:00:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-19 06:00:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-19 06:00:38,720 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-19 06:00:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:38,721 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-19 06:00:38,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-19 06:00:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 06:00:38,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:38,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:38,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:00:38,723 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:38,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-19 06:00:38,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:38,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615203319] [2020-08-19 06:00:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:00:38,765 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:00:38,765 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:00:38,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:00:38,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:00:38 BoogieIcfgContainer [2020-08-19 06:00:38,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:00:38,819 INFO L168 Benchmark]: Toolchain (without parser) took 8399.37 ms. Allocated memory was 140.5 MB in the beginning and 325.6 MB in the end (delta: 185.1 MB). Free memory was 103.4 MB in the beginning and 118.3 MB in the end (delta: -14.8 MB). Peak memory consumption was 170.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:38,820 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:00:38,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 548.93 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.2 MB in the beginning and 178.4 MB in the end (delta: -75.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:38,826 INFO L168 Benchmark]: Boogie Preprocessor took 64.05 ms. Allocated memory is still 203.4 MB. Free memory was 178.4 MB in the beginning and 175.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:38,827 INFO L168 Benchmark]: RCFGBuilder took 893.73 ms. Allocated memory is still 203.4 MB. Free memory was 175.5 MB in the beginning and 122.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:38,828 INFO L168 Benchmark]: TraceAbstraction took 6887.60 ms. Allocated memory was 203.4 MB in the beginning and 325.6 MB in the end (delta: 122.2 MB). Free memory was 122.5 MB in the beginning and 118.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 126.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:38,832 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 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 548.93 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.2 MB in the beginning and 178.4 MB in the end (delta: -75.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.05 ms. Allocated memory is still 203.4 MB. Free memory was 178.4 MB in the beginning and 175.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 893.73 ms. Allocated memory is still 203.4 MB. Free memory was 175.5 MB in the beginning and 122.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6887.60 ms. Allocated memory was 203.4 MB in the beginning and 325.6 MB in the end (delta: 122.2 MB). Free memory was 122.5 MB in the beginning and 118.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 126.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...