/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:20:43,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:20:43,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:20:43,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:20:43,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:20:43,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:20:43,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:20:43,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:20:43,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:20:43,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:20:43,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:20:43,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:20:43,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:20:43,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:20:43,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:20:43,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:20:43,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:20:43,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:20:43,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:20:43,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:20:43,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:20:43,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:20:43,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:20:43,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:20:43,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:20:43,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:20:43,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:20:43,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:20:43,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:20:43,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:20:43,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:20:43,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:20:43,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:20:43,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:20:43,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:20:43,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:20:43,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:20:43,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:20:43,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:20:43,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:20:43,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:20:43,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:20:43,986 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:20:43,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:20:43,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:20:43,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:20:43,989 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:20:43,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:20:43,989 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:20:43,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:20:43,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:20:43,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:20:43,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:20:43,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:20:43,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:20:43,991 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:20:43,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:20:43,992 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:20:43,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:20:43,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:20:43,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:20:43,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:20:43,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:20:43,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:43,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:20:43,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:20:43,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:20:43,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:20:43,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:20:43,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:20:43,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:20:43,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:20:44,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:20:44,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:20:44,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:20:44,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:20:44,361 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:20:44,362 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 17:20:44,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/223de4afc/7a7a252cb6b6461da98780df8596351c/FLAGdcb9a0a74 [2020-08-21 17:20:44,968 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:20:44,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 17:20:44,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/223de4afc/7a7a252cb6b6461da98780df8596351c/FLAGdcb9a0a74 [2020-08-21 17:20:45,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/223de4afc/7a7a252cb6b6461da98780df8596351c [2020-08-21 17:20:45,293 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:20:45,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:20:45,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:45,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:20:45,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:20:45,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4efd89a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45, skipping insertion in model container [2020-08-21 17:20:45,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:20:45,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:20:45,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:45,650 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:20:45,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:45,834 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:20:45,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45 WrapperNode [2020-08-21 17:20:45,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:45,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:20:45,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:20:45,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:20:45,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... [2020-08-21 17:20:45,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:20:45,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:20:45,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:20:45,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:20:45,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:20:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:20:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 17:20:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:20:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:20:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 17:20:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:20:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 17:20:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 17:20:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:20:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:20:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:20:46,202 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 17:20:46,754 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 17:20:46,755 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 17:20:46,767 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:20:46,767 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:20:46,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:46 BoogieIcfgContainer [2020-08-21 17:20:46,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:20:46,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:20:46,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:20:46,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:20:46,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:20:45" (1/3) ... [2020-08-21 17:20:46,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615c8475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:46, skipping insertion in model container [2020-08-21 17:20:46,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:45" (2/3) ... [2020-08-21 17:20:46,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615c8475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:46, skipping insertion in model container [2020-08-21 17:20:46,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:46" (3/3) ... [2020-08-21 17:20:46,783 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-21 17:20:46,795 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:20:46,804 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:20:46,819 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:20:46,847 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:20:46,847 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:20:46,847 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:20:46,847 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:20:46,848 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:20:46,848 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:20:46,848 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:20:46,848 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:20:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-21 17:20:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:20:46,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:46,887 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] [2020-08-21 17:20:46,888 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-21 17:20:46,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:46,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951116340] [2020-08-21 17:20:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:47,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951116340] [2020-08-21 17:20:47,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:47,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:20:47,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780721817] [2020-08-21 17:20:47,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:20:47,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:47,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:20:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:20:47,250 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-21 17:20:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:47,712 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-21 17:20:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:20:47,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 17:20:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:47,729 INFO L225 Difference]: With dead ends: 375 [2020-08-21 17:20:47,729 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 17:20:47,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:20:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 17:20:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-21 17:20:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 17:20:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-21 17:20:47,793 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-21 17:20:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:47,794 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-21 17:20:47,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:20:47,794 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-21 17:20:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 17:20:47,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:47,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:47,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:20:47,796 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-21 17:20:47,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:47,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497466178] [2020-08-21 17:20:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:47,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497466178] [2020-08-21 17:20:47,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:47,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:20:47,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968586563] [2020-08-21 17:20:47,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:20:47,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:20:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:20:47,889 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-21 17:20:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,222 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-21 17:20:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:20:48,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-21 17:20:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,226 INFO L225 Difference]: With dead ends: 448 [2020-08-21 17:20:48,226 INFO L226 Difference]: Without dead ends: 260 [2020-08-21 17:20:48,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:20:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-21 17:20:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-21 17:20:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-21 17:20:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-21 17:20:48,253 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-21 17:20:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,253 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-21 17:20:48,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:20:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-21 17:20:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 17:20:48,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,255 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] [2020-08-21 17:20:48,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:20:48,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,256 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-21 17:20:48,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502947098] [2020-08-21 17:20:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:48,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502947098] [2020-08-21 17:20:48,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851905042] [2020-08-21 17:20:48,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,388 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-21 17:20:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,434 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-21 17:20:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-21 17:20:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,439 INFO L225 Difference]: With dead ends: 698 [2020-08-21 17:20:48,439 INFO L226 Difference]: Without dead ends: 466 [2020-08-21 17:20:48,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-21 17:20:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-21 17:20:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-21 17:20:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-21 17:20:48,505 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-21 17:20:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,506 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-21 17:20:48,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-21 17:20:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 17:20:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,516 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] [2020-08-21 17:20:48,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:20:48,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-21 17:20:48,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566045090] [2020-08-21 17:20:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:48,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566045090] [2020-08-21 17:20:48,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:20:48,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729938434] [2020-08-21 17:20:48,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:20:48,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:20:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:20:48,669 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-21 17:20:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,979 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-21 17:20:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:20:48,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 17:20:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,985 INFO L225 Difference]: With dead ends: 1155 [2020-08-21 17:20:48,985 INFO L226 Difference]: Without dead ends: 655 [2020-08-21 17:20:48,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:20:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-21 17:20:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-21 17:20:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 17:20:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-21 17:20:49,014 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-21 17:20:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,015 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-21 17:20:49,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:20:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-21 17:20:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 17:20:49,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,019 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] [2020-08-21 17:20:49,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:20:49,020 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-21 17:20:49,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144969353] [2020-08-21 17:20:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:49,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144969353] [2020-08-21 17:20:49,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224284412] [2020-08-21 17:20:49,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,078 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-21 17:20:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,097 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-21 17:20:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-21 17:20:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,101 INFO L225 Difference]: With dead ends: 1038 [2020-08-21 17:20:49,102 INFO L226 Difference]: Without dead ends: 526 [2020-08-21 17:20:49,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-21 17:20:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-21 17:20:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 17:20:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-21 17:20:49,127 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-21 17:20:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,129 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-21 17:20:49,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-21 17:20:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:20:49,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,132 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] [2020-08-21 17:20:49,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:20:49,132 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-21 17:20:49,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005945702] [2020-08-21 17:20:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:49,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005945702] [2020-08-21 17:20:49,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285600021] [2020-08-21 17:20:49,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,219 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-21 17:20:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,263 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-21 17:20:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 17:20:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,268 INFO L225 Difference]: With dead ends: 1048 [2020-08-21 17:20:49,268 INFO L226 Difference]: Without dead ends: 536 [2020-08-21 17:20:49,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-21 17:20:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-21 17:20:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-21 17:20:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-21 17:20:49,295 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-21 17:20:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,295 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-21 17:20:49,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-21 17:20:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 17:20:49,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,298 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] [2020-08-21 17:20:49,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:20:49,299 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-21 17:20:49,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949298038] [2020-08-21 17:20:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:49,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949298038] [2020-08-21 17:20:49,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354111141] [2020-08-21 17:20:49,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,360 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-21 17:20:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,577 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-21 17:20:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-21 17:20:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,582 INFO L225 Difference]: With dead ends: 1234 [2020-08-21 17:20:49,582 INFO L226 Difference]: Without dead ends: 670 [2020-08-21 17:20:49,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-21 17:20:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-21 17:20:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-21 17:20:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-21 17:20:49,608 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-21 17:20:49,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,608 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-21 17:20:49,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-21 17:20:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:20:49,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,611 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] [2020-08-21 17:20:49,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:20:49,612 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-21 17:20:49,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632641921] [2020-08-21 17:20:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:49,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632641921] [2020-08-21 17:20:49,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699938612] [2020-08-21 17:20:49,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,675 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-21 17:20:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,726 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-21 17:20:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 17:20:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,735 INFO L225 Difference]: With dead ends: 1720 [2020-08-21 17:20:49,736 INFO L226 Difference]: Without dead ends: 1149 [2020-08-21 17:20:49,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-21 17:20:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-21 17:20:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-21 17:20:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-21 17:20:49,781 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-21 17:20:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,781 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-21 17:20:49,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-21 17:20:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:20:49,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,782 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] [2020-08-21 17:20:49,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:20:49,783 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-21 17:20:49,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912953139] [2020-08-21 17:20:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:49,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912953139] [2020-08-21 17:20:49,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688817615] [2020-08-21 17:20:49,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,837 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-21 17:20:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,898 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-21 17:20:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 17:20:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,911 INFO L225 Difference]: With dead ends: 2602 [2020-08-21 17:20:49,912 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 17:20:49,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 17:20:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-21 17:20:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-21 17:20:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-21 17:20:50,017 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-21 17:20:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:50,017 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-21 17:20:50,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-21 17:20:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:20:50,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:50,018 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] [2020-08-21 17:20:50,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:20:50,019 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-21 17:20:50,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:50,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594949847] [2020-08-21 17:20:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:50,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594949847] [2020-08-21 17:20:50,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:50,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:50,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328208600] [2020-08-21 17:20:50,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:50,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:50,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:50,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,073 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-21 17:20:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:50,272 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-21 17:20:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:50,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 17:20:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:50,287 INFO L225 Difference]: With dead ends: 3635 [2020-08-21 17:20:50,288 INFO L226 Difference]: Without dead ends: 1924 [2020-08-21 17:20:50,296 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 [2020-08-21 17:20:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-21 17:20:50,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-21 17:20:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 17:20:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-21 17:20:50,394 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-21 17:20:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:50,395 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-21 17:20:50,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-21 17:20:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 17:20:50,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:50,397 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] [2020-08-21 17:20:50,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:20:50,397 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-21 17:20:50,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:50,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624108632] [2020-08-21 17:20:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:50,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624108632] [2020-08-21 17:20:50,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:50,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:50,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833073740] [2020-08-21 17:20:50,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:50,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:50,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:50,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,474 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-21 17:20:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:50,683 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-21 17:20:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:50,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 17:20:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:50,694 INFO L225 Difference]: With dead ends: 3747 [2020-08-21 17:20:50,694 INFO L226 Difference]: Without dead ends: 1933 [2020-08-21 17:20:50,698 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 [2020-08-21 17:20:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-21 17:20:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-21 17:20:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 17:20:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-21 17:20:50,787 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-21 17:20:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:50,789 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-21 17:20:50,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-21 17:20:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 17:20:50,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:50,791 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] [2020-08-21 17:20:50,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:20:50,791 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-21 17:20:50,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:50,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537809517] [2020-08-21 17:20:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:50,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537809517] [2020-08-21 17:20:50,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:50,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:50,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337355765] [2020-08-21 17:20:50,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:50,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:50,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,892 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-21 17:20:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:51,107 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-21 17:20:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:51,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 17:20:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:51,118 INFO L225 Difference]: With dead ends: 3744 [2020-08-21 17:20:51,119 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 17:20:51,124 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 [2020-08-21 17:20:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 17:20:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-21 17:20:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 17:20:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-21 17:20:51,195 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-21 17:20:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:51,196 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-21 17:20:51,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-21 17:20:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 17:20:51,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:51,197 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] [2020-08-21 17:20:51,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:20:51,198 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-21 17:20:51,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:51,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098125473] [2020-08-21 17:20:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:51,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098125473] [2020-08-21 17:20:51,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:51,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:51,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260114807] [2020-08-21 17:20:51,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:51,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:51,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:51,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:51,257 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-21 17:20:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:51,432 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-21 17:20:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:51,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-21 17:20:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:51,442 INFO L225 Difference]: With dead ends: 3741 [2020-08-21 17:20:51,442 INFO L226 Difference]: Without dead ends: 1891 [2020-08-21 17:20:51,446 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 [2020-08-21 17:20:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-21 17:20:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-21 17:20:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 17:20:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-21 17:20:51,515 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-21 17:20:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:51,516 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-21 17:20:51,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-21 17:20:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:20:51,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:51,518 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] [2020-08-21 17:20:51,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:20:51,519 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-21 17:20:51,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:51,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158091950] [2020-08-21 17:20:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:51,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158091950] [2020-08-21 17:20:51,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:51,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:51,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766498806] [2020-08-21 17:20:51,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:51,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:51,654 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-21 17:20:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:51,909 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-21 17:20:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:51,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-21 17:20:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:51,923 INFO L225 Difference]: With dead ends: 3810 [2020-08-21 17:20:51,923 INFO L226 Difference]: Without dead ends: 1960 [2020-08-21 17:20:51,930 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 [2020-08-21 17:20:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-21 17:20:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-21 17:20:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 17:20:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-21 17:20:52,033 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-21 17:20:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:52,034 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-21 17:20:52,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-21 17:20:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 17:20:52,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:52,037 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] [2020-08-21 17:20:52,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:20:52,037 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-21 17:20:52,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:52,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153510611] [2020-08-21 17:20:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:52,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153510611] [2020-08-21 17:20:52,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:52,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:52,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137029307] [2020-08-21 17:20:52,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:52,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:52,109 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-21 17:20:52,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:52,377 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-21 17:20:52,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:52,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-21 17:20:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:52,390 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 17:20:52,390 INFO L226 Difference]: Without dead ends: 2096 [2020-08-21 17:20:52,398 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 [2020-08-21 17:20:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-21 17:20:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-21 17:20:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-21 17:20:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-21 17:20:52,522 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-21 17:20:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:52,522 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-21 17:20:52,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-21 17:20:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:20:52,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:52,524 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] [2020-08-21 17:20:52,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 17:20:52,525 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-21 17:20:52,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:52,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434954281] [2020-08-21 17:20:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 17:20:52,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434954281] [2020-08-21 17:20:52,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:52,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:52,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661141834] [2020-08-21 17:20:52,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:52,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:52,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:52,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:52,590 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-21 17:20:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:52,936 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-21 17:20:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:52,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 17:20:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:52,951 INFO L225 Difference]: With dead ends: 4276 [2020-08-21 17:20:52,952 INFO L226 Difference]: Without dead ends: 2293 [2020-08-21 17:20:52,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-21 17:20:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-21 17:20:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-21 17:20:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-21 17:20:53,062 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-21 17:20:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,063 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-21 17:20:53,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-21 17:20:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:20:53,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,065 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] [2020-08-21 17:20:53,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 17:20:53,065 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-21 17:20:53,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321906974] [2020-08-21 17:20:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 17:20:53,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321906974] [2020-08-21 17:20:53,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431542372] [2020-08-21 17:20:53,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,140 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-21 17:20:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,218 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-21 17:20:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 17:20:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,233 INFO L225 Difference]: With dead ends: 4420 [2020-08-21 17:20:53,233 INFO L226 Difference]: Without dead ends: 2947 [2020-08-21 17:20:53,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-21 17:20:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-21 17:20:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-21 17:20:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-21 17:20:53,334 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-21 17:20:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,334 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-21 17:20:53,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-21 17:20:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 17:20:53,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,336 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] [2020-08-21 17:20:53,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 17:20:53,336 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-21 17:20:53,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325542073] [2020-08-21 17:20:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:20:53,371 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:20:53,371 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:20:53,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 17:20:53,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:20:53 BoogieIcfgContainer [2020-08-21 17:20:53,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:20:53,425 INFO L168 Benchmark]: Toolchain (without parser) took 8124.28 ms. Allocated memory was 140.0 MB in the beginning and 326.1 MB in the end (delta: 186.1 MB). Free memory was 103.0 MB in the beginning and 132.6 MB in the end (delta: -29.6 MB). Peak memory consumption was 156.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:53,426 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:20:53,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 536.84 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.8 MB in the beginning and 177.3 MB in the end (delta: -74.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:53,432 INFO L168 Benchmark]: Boogie Preprocessor took 58.58 ms. Allocated memory is still 202.4 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:53,434 INFO L168 Benchmark]: RCFGBuilder took 879.11 ms. Allocated memory is still 202.4 MB. Free memory was 174.6 MB in the beginning and 121.5 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:53,435 INFO L168 Benchmark]: TraceAbstraction took 6642.27 ms. Allocated memory was 202.4 MB in the beginning and 326.1 MB in the end (delta: 123.7 MB). Free memory was 120.8 MB in the beginning and 132.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:53,441 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 536.84 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.8 MB in the beginning and 177.3 MB in the end (delta: -74.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.58 ms. Allocated memory is still 202.4 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 879.11 ms. Allocated memory is still 202.4 MB. Free memory was 174.6 MB in the beginning and 121.5 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6642.27 ms. Allocated memory was 202.4 MB in the beginning and 326.1 MB in the end (delta: 123.7 MB). Free memory was 120.8 MB in the beginning and 132.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 112.0 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: 6.5s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.5s, 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, 1.7s 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: 1.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.9s 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...