/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=SHALLOWEST --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 19:45:40,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:45:40,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:45:40,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:45:40,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:45:40,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:45:40,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:45:40,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:45:40,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:45:40,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:45:40,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:45:40,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:45:40,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:45:40,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:45:40,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:45:40,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:45:40,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:45:40,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:45:40,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:45:40,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:45:40,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:45:40,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:45:40,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:45:40,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:45:40,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:45:40,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:45:40,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:45:40,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:45:40,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:45:40,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:45:40,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:45:40,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:45:40,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:45:40,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:45:40,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:45:40,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:45:40,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:45:40,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:45:40,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:45:40,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:45:40,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:45:40,861 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 19:45:40,905 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:45:40,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:45:40,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:45:40,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:45:40,908 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:45:40,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:45:40,908 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:45:40,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:45:40,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:45:40,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:45:40,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:45:40,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:45:40,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:45:40,911 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:45:40,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:45:40,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:45:40,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:45:40,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:45:40,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:45:40,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:45:40,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:45:40,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:45:40,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:45:40,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:45:40,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:45:40,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:45:40,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:45:40,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:45:40,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:45:40,914 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=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:45:41,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:45:41,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:45:41,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:45:41,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:45:41,220 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:45:41,221 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 19:45:41,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35db935e/25a212a8cf2147a9a92ec95dca65dc55/FLAGb67ab076d [2020-08-21 19:45:41,811 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:45:41,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 19:45:41,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35db935e/25a212a8cf2147a9a92ec95dca65dc55/FLAGb67ab076d [2020-08-21 19:45:42,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35db935e/25a212a8cf2147a9a92ec95dca65dc55 [2020-08-21 19:45:42,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:45:42,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:45:42,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:42,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:45:42,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:45:42,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@786a7c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42, skipping insertion in model container [2020-08-21 19:45:42,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:45:42,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:45:42,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:42,562 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:45:42,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:42,726 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:45:42,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42 WrapperNode [2020-08-21 19:45:42,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:42,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:45:42,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:45:42,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:45:42,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:45:42,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:45:42,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:45:42,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:45:42,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (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 19:45:42,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:45:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:45:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 19:45:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:45:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:45:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 19:45:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:45:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 19:45:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 19:45:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:45:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:45:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:45:43,092 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 19:45:43,691 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 19:45:43,691 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 19:45:43,702 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:45:43,703 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 19:45:43,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:43 BoogieIcfgContainer [2020-08-21 19:45:43,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:45:43,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:45:43,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:45:43,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:45:43,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:45:42" (1/3) ... [2020-08-21 19:45:43,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d0d44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:43, skipping insertion in model container [2020-08-21 19:45:43,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (2/3) ... [2020-08-21 19:45:43,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d0d44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:43, skipping insertion in model container [2020-08-21 19:45:43,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:43" (3/3) ... [2020-08-21 19:45:43,717 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-21 19:45:43,728 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:45:43,736 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:45:43,750 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:45:43,777 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:45:43,777 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:45:43,778 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:45:43,778 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:45:43,778 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:45:43,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:45:43,779 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:45:43,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:45:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-21 19:45:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 19:45:43,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:43,812 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 19:45:43,813 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-21 19:45:43,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:43,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588484355] [2020-08-21 19:45:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,096 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 19:45:44,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588484355] [2020-08-21 19:45:44,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:44,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:44,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700579511] [2020-08-21 19:45:44,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:44,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:44,124 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-21 19:45:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:44,528 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-21 19:45:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:44,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 19:45:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:44,545 INFO L225 Difference]: With dead ends: 375 [2020-08-21 19:45:44,546 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 19:45:44,551 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 19:45:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 19:45:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-21 19:45:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 19:45:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-21 19:45:44,613 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-21 19:45:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:44,614 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-21 19:45:44,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-21 19:45:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 19:45:44,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:44,616 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 19:45:44,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:45:44,617 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-21 19:45:44,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:44,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259844821] [2020-08-21 19:45:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,740 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 19:45:44,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259844821] [2020-08-21 19:45:44,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:44,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:44,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532534585] [2020-08-21 19:45:44,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:44,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:44,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:44,746 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-21 19:45:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:45,106 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-21 19:45:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:45,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-21 19:45:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:45,114 INFO L225 Difference]: With dead ends: 448 [2020-08-21 19:45:45,114 INFO L226 Difference]: Without dead ends: 260 [2020-08-21 19:45:45,118 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 19:45:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-21 19:45:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-21 19:45:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-21 19:45:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-21 19:45:45,158 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-21 19:45:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:45,158 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-21 19:45:45,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-21 19:45:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 19:45:45,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:45,160 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 19:45:45,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:45:45,161 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-21 19:45:45,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:45,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259741976] [2020-08-21 19:45:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,223 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 19:45:45,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259741976] [2020-08-21 19:45:45,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:45,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:45,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977355042] [2020-08-21 19:45:45,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:45,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:45,226 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-21 19:45:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:45,255 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-21 19:45:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:45,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-21 19:45:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:45,260 INFO L225 Difference]: With dead ends: 698 [2020-08-21 19:45:45,260 INFO L226 Difference]: Without dead ends: 466 [2020-08-21 19:45:45,264 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 19:45:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-21 19:45:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-21 19:45:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-21 19:45:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-21 19:45:45,329 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-21 19:45:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:45,330 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-21 19:45:45,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-21 19:45:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 19:45:45,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:45,335 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 19:45:45,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:45:45,335 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-21 19:45:45,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:45,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935888867] [2020-08-21 19:45:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,487 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 19:45:45,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935888867] [2020-08-21 19:45:45,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:45,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:45:45,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155700720] [2020-08-21 19:45:45,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:45:45,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:45,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:45:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:45:45,492 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-21 19:45:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:45,818 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-21 19:45:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:45:45,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 19:45:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:45,825 INFO L225 Difference]: With dead ends: 1155 [2020-08-21 19:45:45,825 INFO L226 Difference]: Without dead ends: 655 [2020-08-21 19:45:45,828 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 19:45:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-21 19:45:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-21 19:45:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 19:45:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-21 19:45:45,865 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-21 19:45:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:45,866 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-21 19:45:45,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:45:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-21 19:45:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 19:45:45,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:45,880 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 19:45:45,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:45:45,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-21 19:45:45,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:45,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721011177] [2020-08-21 19:45:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,952 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 19:45:45,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721011177] [2020-08-21 19:45:45,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:45,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:45,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135343996] [2020-08-21 19:45:45,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:45,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:45,955 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-21 19:45:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:45,972 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-21 19:45:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:45,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-21 19:45:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:45,976 INFO L225 Difference]: With dead ends: 1038 [2020-08-21 19:45:45,976 INFO L226 Difference]: Without dead ends: 526 [2020-08-21 19:45:45,977 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 19:45:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-21 19:45:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-21 19:45:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 19:45:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-21 19:45:45,996 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-21 19:45:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:45,997 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-21 19:45:45,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-21 19:45:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 19:45:45,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:45,999 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 19:45:45,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:45:45,999 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:45,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-21 19:45:46,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997048958] [2020-08-21 19:45:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,043 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 19:45:46,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997048958] [2020-08-21 19:45:46,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:46,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:46,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160098454] [2020-08-21 19:45:46,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:46,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:46,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:46,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:46,046 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-21 19:45:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:46,081 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-21 19:45:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:46,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 19:45:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:46,085 INFO L225 Difference]: With dead ends: 1048 [2020-08-21 19:45:46,086 INFO L226 Difference]: Without dead ends: 536 [2020-08-21 19:45:46,087 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 19:45:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-21 19:45:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-21 19:45:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-21 19:45:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-21 19:45:46,107 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-21 19:45:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:46,108 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-21 19:45:46,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-21 19:45:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 19:45:46,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:46,109 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 19:45:46,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:45:46,110 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-21 19:45:46,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520446620] [2020-08-21 19:45:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,149 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 19:45:46,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520446620] [2020-08-21 19:45:46,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:46,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:46,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399945590] [2020-08-21 19:45:46,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:46,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:46,151 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-21 19:45:46,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:46,397 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-21 19:45:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:46,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-21 19:45:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:46,402 INFO L225 Difference]: With dead ends: 1234 [2020-08-21 19:45:46,402 INFO L226 Difference]: Without dead ends: 670 [2020-08-21 19:45:46,403 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 19:45:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-21 19:45:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-21 19:45:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-21 19:45:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-21 19:45:46,425 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-21 19:45:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:46,426 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-21 19:45:46,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-21 19:45:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 19:45:46,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:46,427 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 19:45:46,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:45:46,428 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-21 19:45:46,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25653025] [2020-08-21 19:45:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,473 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 19:45:46,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25653025] [2020-08-21 19:45:46,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:46,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:46,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335970921] [2020-08-21 19:45:46,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:46,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:46,477 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-21 19:45:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:46,525 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-21 19:45:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:46,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 19:45:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:46,534 INFO L225 Difference]: With dead ends: 1720 [2020-08-21 19:45:46,534 INFO L226 Difference]: Without dead ends: 1149 [2020-08-21 19:45:46,536 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 19:45:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-21 19:45:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-21 19:45:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-21 19:45:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-21 19:45:46,586 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-21 19:45:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:46,587 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-21 19:45:46,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-21 19:45:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 19:45:46,588 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:46,589 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 19:45:46,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:45:46,589 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-21 19:45:46,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647702499] [2020-08-21 19:45:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,668 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 19:45:46,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647702499] [2020-08-21 19:45:46,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:46,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:46,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223266144] [2020-08-21 19:45:46,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:46,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:46,673 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-21 19:45:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:46,760 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-21 19:45:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:46,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 19:45:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:46,773 INFO L225 Difference]: With dead ends: 2602 [2020-08-21 19:45:46,773 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 19:45:46,777 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 19:45:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 19:45:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-21 19:45:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-21 19:45:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-21 19:45:46,903 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-21 19:45:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:46,903 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-21 19:45:46,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-21 19:45:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 19:45:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:46,907 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 19:45:46,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:45:46,908 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-21 19:45:46,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442365838] [2020-08-21 19:45:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,967 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 19:45:46,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442365838] [2020-08-21 19:45:46,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:46,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:46,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695547664] [2020-08-21 19:45:46,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:46,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:46,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:46,972 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-21 19:45:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:47,166 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-21 19:45:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:47,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 19:45:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:47,177 INFO L225 Difference]: With dead ends: 3635 [2020-08-21 19:45:47,177 INFO L226 Difference]: Without dead ends: 1924 [2020-08-21 19:45:47,181 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 19:45:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-21 19:45:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-21 19:45:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 19:45:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-21 19:45:47,276 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-21 19:45:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:47,277 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-21 19:45:47,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-21 19:45:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 19:45:47,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:47,280 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 19:45:47,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:45:47,280 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:47,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:47,281 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-21 19:45:47,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:47,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305132580] [2020-08-21 19:45:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,355 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 19:45:47,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305132580] [2020-08-21 19:45:47,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:47,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:47,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741094135] [2020-08-21 19:45:47,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:47,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:47,359 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-21 19:45:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:47,630 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-21 19:45:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:47,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 19:45:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:47,645 INFO L225 Difference]: With dead ends: 3747 [2020-08-21 19:45:47,645 INFO L226 Difference]: Without dead ends: 1933 [2020-08-21 19:45:47,650 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 19:45:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-21 19:45:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-21 19:45:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 19:45:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-21 19:45:47,783 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-21 19:45:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:47,784 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-21 19:45:47,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-21 19:45:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 19:45:47,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:47,786 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 19:45:47,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:45:47,787 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-21 19:45:47,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:47,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712035497] [2020-08-21 19:45:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,846 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 19:45:47,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712035497] [2020-08-21 19:45:47,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:47,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:47,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027470189] [2020-08-21 19:45:47,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:47,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:47,847 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-21 19:45:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:48,033 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-21 19:45:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:48,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 19:45:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:48,044 INFO L225 Difference]: With dead ends: 3744 [2020-08-21 19:45:48,044 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 19:45:48,048 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 19:45:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 19:45:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-21 19:45:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 19:45:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-21 19:45:48,113 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-21 19:45:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:48,113 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-21 19:45:48,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-21 19:45:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 19:45:48,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:48,115 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 19:45:48,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:45:48,115 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-21 19:45:48,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:48,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570554632] [2020-08-21 19:45:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,164 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 19:45:48,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570554632] [2020-08-21 19:45:48,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:48,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:48,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303594697] [2020-08-21 19:45:48,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:48,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:48,166 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-21 19:45:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:48,334 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-21 19:45:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:48,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-21 19:45:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:48,344 INFO L225 Difference]: With dead ends: 3741 [2020-08-21 19:45:48,344 INFO L226 Difference]: Without dead ends: 1891 [2020-08-21 19:45:48,348 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 19:45:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-21 19:45:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-21 19:45:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 19:45:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-21 19:45:48,440 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-21 19:45:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:48,440 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-21 19:45:48,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-21 19:45:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 19:45:48,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:48,442 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 19:45:48,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:45:48,443 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-21 19:45:48,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:48,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565832952] [2020-08-21 19:45:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,501 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 19:45:48,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565832952] [2020-08-21 19:45:48,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:48,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:48,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679093729] [2020-08-21 19:45:48,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:48,504 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-21 19:45:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:48,713 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-21 19:45:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:48,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-21 19:45:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:48,725 INFO L225 Difference]: With dead ends: 3810 [2020-08-21 19:45:48,726 INFO L226 Difference]: Without dead ends: 1960 [2020-08-21 19:45:48,732 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 19:45:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-21 19:45:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-21 19:45:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 19:45:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-21 19:45:48,815 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-21 19:45:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:48,816 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-21 19:45:48,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-21 19:45:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 19:45:48,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:48,818 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 19:45:48,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:45:48,819 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:48,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:48,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-21 19:45:48,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:48,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897493646] [2020-08-21 19:45:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,907 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 19:45:48,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897493646] [2020-08-21 19:45:48,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:48,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:48,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498139168] [2020-08-21 19:45:48,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:48,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:48,910 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-21 19:45:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:49,116 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-21 19:45:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:49,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-21 19:45:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:49,127 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 19:45:49,128 INFO L226 Difference]: Without dead ends: 2096 [2020-08-21 19:45:49,133 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 19:45:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-21 19:45:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-21 19:45:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-21 19:45:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-21 19:45:49,204 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-21 19:45:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:49,205 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-21 19:45:49,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-21 19:45:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 19:45:49,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:49,206 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 19:45:49,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 19:45:49,207 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-21 19:45:49,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:49,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421504275] [2020-08-21 19:45:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,251 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 19:45:49,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421504275] [2020-08-21 19:45:49,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:49,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:49,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558678040] [2020-08-21 19:45:49,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:49,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:49,255 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-21 19:45:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:49,474 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-21 19:45:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:49,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 19:45:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:49,487 INFO L225 Difference]: With dead ends: 4276 [2020-08-21 19:45:49,488 INFO L226 Difference]: Without dead ends: 2293 [2020-08-21 19:45:49,493 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 19:45:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-21 19:45:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-21 19:45:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-21 19:45:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-21 19:45:49,565 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-21 19:45:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:49,566 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-21 19:45:49,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-21 19:45:49,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 19:45:49,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:49,568 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 19:45:49,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 19:45:49,568 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-21 19:45:49,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:49,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958450013] [2020-08-21 19:45:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,623 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 19:45:49,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958450013] [2020-08-21 19:45:49,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:49,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:49,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357834308] [2020-08-21 19:45:49,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:49,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:49,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:49,626 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-21 19:45:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:49,686 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-21 19:45:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:49,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 19:45:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:49,700 INFO L225 Difference]: With dead ends: 4420 [2020-08-21 19:45:49,700 INFO L226 Difference]: Without dead ends: 2947 [2020-08-21 19:45:49,704 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 19:45:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-21 19:45:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-21 19:45:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-21 19:45:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-21 19:45:49,795 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-21 19:45:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:49,796 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-21 19:45:49,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-21 19:45:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 19:45:49,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:49,798 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 19:45:49,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 19:45:49,798 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:49,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-21 19:45:49,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:49,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706331578] [2020-08-21 19:45:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:45:49,839 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:45:49,839 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:45:49,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 19:45:49,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:45:49 BoogieIcfgContainer [2020-08-21 19:45:49,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:45:49,898 INFO L168 Benchmark]: Toolchain (without parser) took 7677.46 ms. Allocated memory was 140.5 MB in the beginning and 332.9 MB in the end (delta: 192.4 MB). Free memory was 101.7 MB in the beginning and 139.8 MB in the end (delta: -38.2 MB). Peak memory consumption was 154.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:49,904 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 19:45:49,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 506.25 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 178.5 MB in the end (delta: -77.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:49,905 INFO L168 Benchmark]: Boogie Preprocessor took 66.40 ms. Allocated memory is still 203.4 MB. Free memory was 178.5 MB in the beginning and 175.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:49,906 INFO L168 Benchmark]: RCFGBuilder took 913.94 ms. Allocated memory is still 203.4 MB. Free memory was 175.7 MB in the beginning and 122.6 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:49,906 INFO L168 Benchmark]: TraceAbstraction took 6186.18 ms. Allocated memory was 203.4 MB in the beginning and 332.9 MB in the end (delta: 129.5 MB). Free memory was 121.9 MB in the beginning and 139.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 111.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:49,911 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 506.25 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 178.5 MB in the end (delta: -77.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.40 ms. Allocated memory is still 203.4 MB. Free memory was 178.5 MB in the beginning and 175.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 913.94 ms. Allocated memory is still 203.4 MB. Free memory was 175.7 MB in the beginning and 122.6 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6186.18 ms. Allocated memory was 203.4 MB in the beginning and 332.9 MB in the end (delta: 129.5 MB). Free memory was 121.9 MB in the beginning and 139.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 111.6 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: 6.0s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.3s, 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, 1.6s 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, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...