/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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 [2020-08-22 02:14:11,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:14:11,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:14:11,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:14:11,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:14:11,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:14:11,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:14:11,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:14:11,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:14:11,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:14:11,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:14:11,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:14:11,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:14:11,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:14:11,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:14:11,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:14:11,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:14:11,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:14:11,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:14:11,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:14:11,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:14:11,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:14:11,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:14:11,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:14:11,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:14:11,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:14:11,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:14:11,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:14:11,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:14:11,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 02:14:11,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 02:14:11,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 02:14:11,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 02:14:11,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 02:14:11,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 02:14:11,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 02:14:11,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 02:14:11,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 02:14:11,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:14:11,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:14:11,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:14:11,771 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 [2020-08-22 02:14:11,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:14:11,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:14:11,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:14:11,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:14:11,813 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:14:11,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:14:11,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:14:11,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:14:11,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:14:11,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:14:11,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:14:11,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:14:11,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:14:11,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:14:11,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:14:11,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:14:11,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:14:11,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:14:11,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:14:11,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:14:11,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:14:11,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:14:11,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:14:11,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:14:11,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:14:11,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:14:11,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:14:11,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:14:11,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:14:11,819 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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:14:12,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:14:12,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:14:12,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:14:12,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:14:12,182 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:14:12,183 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-22 02:14:12,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d88e843fd/8e56c13e8d854880bf1c22e87457865b/FLAG4676cbd57 [2020-08-22 02:14:12,758 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:14:12,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-22 02:14:12,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d88e843fd/8e56c13e8d854880bf1c22e87457865b/FLAG4676cbd57 [2020-08-22 02:14:13,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d88e843fd/8e56c13e8d854880bf1c22e87457865b [2020-08-22 02:14:13,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:14:13,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:14:13,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:13,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:14:13,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:14:13,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91f500f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13, skipping insertion in model container [2020-08-22 02:14:13,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:14:13,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:14:13,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:13,465 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:14:13,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:13,645 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:14:13,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13 WrapperNode [2020-08-22 02:14:13,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:13,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:14:13,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:14:13,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:14:13,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:13,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:14:13,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:14:13,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:14:13,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:14:13,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (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 [2020-08-22 02:14:13,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:14:13,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:14:13,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-22 02:14:13,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:14:13,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:14:13,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 02:14:13,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:14:13,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-22 02:14:13,776 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-22 02:14:13,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:14:13,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:14:13,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:14:13,991 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 02:14:14,559 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-22 02:14:14,560 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-22 02:14:14,571 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:14:14,572 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 02:14:14,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:14 BoogieIcfgContainer [2020-08-22 02:14:14,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:14:14,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:14:14,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:14:14,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:14:14,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:14:13" (1/3) ... [2020-08-22 02:14:14,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a945b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:14, skipping insertion in model container [2020-08-22 02:14:14,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:13" (2/3) ... [2020-08-22 02:14:14,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a945b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:14, skipping insertion in model container [2020-08-22 02:14:14,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:14" (3/3) ... [2020-08-22 02:14:14,588 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-22 02:14:14,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:14:14,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:14:14,625 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:14:14,653 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:14:14,654 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:14:14,654 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:14:14,654 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:14:14,654 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:14:14,655 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:14:14,655 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:14:14,655 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:14:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-22 02:14:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:14:14,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:14,688 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] [2020-08-22 02:14:14,688 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-22 02:14:14,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:14,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768923502] [2020-08-22 02:14:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:14,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768923502] [2020-08-22 02:14:15,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:14:15,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924135150] [2020-08-22 02:14:15,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:14:15,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:14:15,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:14:15,029 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-22 02:14:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:15,478 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-22 02:14:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:14:15,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-22 02:14:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:15,497 INFO L225 Difference]: With dead ends: 375 [2020-08-22 02:14:15,497 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 02:14:15,503 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 [2020-08-22 02:14:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 02:14:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-22 02:14:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 02:14:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-22 02:14:15,574 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-22 02:14:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:15,575 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-22 02:14:15,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:14:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-22 02:14:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 02:14:15,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:15,577 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] [2020-08-22 02:14:15,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:14:15,578 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-22 02:14:15,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:15,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536532458] [2020-08-22 02:14:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536532458] [2020-08-22 02:14:15,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:14:15,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493564105] [2020-08-22 02:14:15,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:14:15,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:14:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:14:15,679 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-22 02:14:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,003 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-22 02:14:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:14:16,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-22 02:14:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,008 INFO L225 Difference]: With dead ends: 448 [2020-08-22 02:14:16,012 INFO L226 Difference]: Without dead ends: 260 [2020-08-22 02:14:16,016 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 [2020-08-22 02:14:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-22 02:14:16,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-22 02:14:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-22 02:14:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-22 02:14:16,062 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-22 02:14:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,062 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-22 02:14:16,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:14:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-22 02:14:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 02:14:16,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,065 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] [2020-08-22 02:14:16,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:14:16,065 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-22 02:14:16,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993523624] [2020-08-22 02:14:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993523624] [2020-08-22 02:14:16,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344423187] [2020-08-22 02:14:16,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,148 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-22 02:14:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,183 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-22 02:14:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-22 02:14:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,187 INFO L225 Difference]: With dead ends: 698 [2020-08-22 02:14:16,187 INFO L226 Difference]: Without dead ends: 466 [2020-08-22 02:14:16,189 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 [2020-08-22 02:14:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-22 02:14:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-22 02:14:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-22 02:14:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-22 02:14:16,223 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-22 02:14:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,224 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-22 02:14:16,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-22 02:14:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 02:14:16,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,226 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] [2020-08-22 02:14:16,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:14:16,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-22 02:14:16,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927871413] [2020-08-22 02:14:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927871413] [2020-08-22 02:14:16,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:14:16,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017709526] [2020-08-22 02:14:16,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:14:16,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:14:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:14:16,339 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-22 02:14:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,680 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-22 02:14:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:14:16,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 02:14:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,687 INFO L225 Difference]: With dead ends: 1155 [2020-08-22 02:14:16,687 INFO L226 Difference]: Without dead ends: 655 [2020-08-22 02:14:16,689 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 [2020-08-22 02:14:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-22 02:14:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-22 02:14:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-22 02:14:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-22 02:14:16,720 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-22 02:14:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,721 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-22 02:14:16,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:14:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-22 02:14:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 02:14:16,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,733 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] [2020-08-22 02:14:16,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:14:16,736 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-22 02:14:16,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028455097] [2020-08-22 02:14:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028455097] [2020-08-22 02:14:16,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838252940] [2020-08-22 02:14:16,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,824 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-22 02:14:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,844 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-22 02:14:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-22 02:14:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,848 INFO L225 Difference]: With dead ends: 1038 [2020-08-22 02:14:16,848 INFO L226 Difference]: Without dead ends: 526 [2020-08-22 02:14:16,850 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 [2020-08-22 02:14:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-22 02:14:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-22 02:14:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-22 02:14:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-22 02:14:16,872 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-22 02:14:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,872 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-22 02:14:16,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-22 02:14:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 02:14:16,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,874 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] [2020-08-22 02:14:16,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:14:16,875 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-22 02:14:16,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298337989] [2020-08-22 02:14:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298337989] [2020-08-22 02:14:16,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340723500] [2020-08-22 02:14:16,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,925 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-22 02:14:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,964 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-22 02:14:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-22 02:14:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,968 INFO L225 Difference]: With dead ends: 1048 [2020-08-22 02:14:16,968 INFO L226 Difference]: Without dead ends: 536 [2020-08-22 02:14:16,970 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 [2020-08-22 02:14:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-22 02:14:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-22 02:14:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-22 02:14:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-22 02:14:16,993 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-22 02:14:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,994 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-22 02:14:16,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-22 02:14:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 02:14:16,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,996 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] [2020-08-22 02:14:16,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:14:16,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-22 02:14:16,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315599034] [2020-08-22 02:14:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315599034] [2020-08-22 02:14:17,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129868884] [2020-08-22 02:14:17,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,043 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-22 02:14:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:17,298 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-22 02:14:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:17,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-22 02:14:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:17,303 INFO L225 Difference]: With dead ends: 1234 [2020-08-22 02:14:17,304 INFO L226 Difference]: Without dead ends: 670 [2020-08-22 02:14:17,306 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 [2020-08-22 02:14:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-22 02:14:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-22 02:14:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-22 02:14:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-22 02:14:17,339 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-22 02:14:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,340 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-22 02:14:17,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-22 02:14:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 02:14:17,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,341 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] [2020-08-22 02:14:17,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:14:17,342 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-22 02:14:17,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063496218] [2020-08-22 02:14:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063496218] [2020-08-22 02:14:17,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841042178] [2020-08-22 02:14:17,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,435 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-22 02:14:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:17,494 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-22 02:14:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:17,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-22 02:14:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:17,503 INFO L225 Difference]: With dead ends: 1720 [2020-08-22 02:14:17,504 INFO L226 Difference]: Without dead ends: 1149 [2020-08-22 02:14:17,506 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 [2020-08-22 02:14:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-22 02:14:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-22 02:14:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-22 02:14:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-22 02:14:17,558 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-22 02:14:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,560 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-22 02:14:17,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-22 02:14:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 02:14:17,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,562 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] [2020-08-22 02:14:17,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:14:17,562 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-22 02:14:17,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819620274] [2020-08-22 02:14:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819620274] [2020-08-22 02:14:17,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102640118] [2020-08-22 02:14:17,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,628 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-22 02:14:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:17,700 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-22 02:14:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:17,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-22 02:14:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:17,713 INFO L225 Difference]: With dead ends: 2602 [2020-08-22 02:14:17,714 INFO L226 Difference]: Without dead ends: 1734 [2020-08-22 02:14:17,717 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 [2020-08-22 02:14:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-22 02:14:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-22 02:14:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-22 02:14:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-22 02:14:17,801 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-22 02:14:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,802 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-22 02:14:17,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-22 02:14:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 02:14:17,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,806 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] [2020-08-22 02:14:17,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:14:17,807 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-22 02:14:17,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258621890] [2020-08-22 02:14:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258621890] [2020-08-22 02:14:17,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157672022] [2020-08-22 02:14:17,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,865 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-22 02:14:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:18,099 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-22 02:14:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:18,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-22 02:14:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:18,110 INFO L225 Difference]: With dead ends: 3635 [2020-08-22 02:14:18,111 INFO L226 Difference]: Without dead ends: 1924 [2020-08-22 02:14:18,114 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 [2020-08-22 02:14:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-22 02:14:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-22 02:14:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-22 02:14:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-22 02:14:18,191 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-22 02:14:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:18,191 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-22 02:14:18,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-22 02:14:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 02:14:18,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:18,193 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] [2020-08-22 02:14:18,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:14:18,194 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:18,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-22 02:14:18,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:18,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853056940] [2020-08-22 02:14:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:18,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853056940] [2020-08-22 02:14:18,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:18,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:18,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732762618] [2020-08-22 02:14:18,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:18,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:18,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:18,250 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-22 02:14:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:18,448 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-22 02:14:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:18,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-22 02:14:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:18,459 INFO L225 Difference]: With dead ends: 3747 [2020-08-22 02:14:18,460 INFO L226 Difference]: Without dead ends: 1933 [2020-08-22 02:14:18,463 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 [2020-08-22 02:14:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-22 02:14:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-22 02:14:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-22 02:14:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-22 02:14:18,552 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-22 02:14:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:18,554 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-22 02:14:18,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-22 02:14:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 02:14:18,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:18,556 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] [2020-08-22 02:14:18,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:14:18,556 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:18,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-22 02:14:18,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:18,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857488575] [2020-08-22 02:14:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:18,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857488575] [2020-08-22 02:14:18,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:18,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:18,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726350089] [2020-08-22 02:14:18,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:18,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:18,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:18,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:18,634 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-22 02:14:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:18,862 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-22 02:14:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:18,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-22 02:14:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:18,876 INFO L225 Difference]: With dead ends: 3744 [2020-08-22 02:14:18,876 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 02:14:18,886 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 [2020-08-22 02:14:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 02:14:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-22 02:14:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-22 02:14:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-22 02:14:19,057 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-22 02:14:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,058 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-22 02:14:19,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-22 02:14:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 02:14:19,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,059 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] [2020-08-22 02:14:19,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:14:19,060 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-22 02:14:19,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753977117] [2020-08-22 02:14:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:19,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753977117] [2020-08-22 02:14:19,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221405824] [2020-08-22 02:14:19,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,122 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-22 02:14:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,373 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-22 02:14:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-22 02:14:19,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,382 INFO L225 Difference]: With dead ends: 3741 [2020-08-22 02:14:19,383 INFO L226 Difference]: Without dead ends: 1891 [2020-08-22 02:14:19,387 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 [2020-08-22 02:14:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-22 02:14:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-22 02:14:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-22 02:14:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-22 02:14:19,450 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-22 02:14:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,450 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-22 02:14:19,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-22 02:14:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 02:14:19,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,452 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] [2020-08-22 02:14:19,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:14:19,453 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,453 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-22 02:14:19,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645280365] [2020-08-22 02:14:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:19,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645280365] [2020-08-22 02:14:19,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657920163] [2020-08-22 02:14:19,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,507 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-22 02:14:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,725 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-22 02:14:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-22 02:14:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,737 INFO L225 Difference]: With dead ends: 3810 [2020-08-22 02:14:19,738 INFO L226 Difference]: Without dead ends: 1960 [2020-08-22 02:14:19,743 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 [2020-08-22 02:14:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-22 02:14:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-22 02:14:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-22 02:14:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-22 02:14:19,835 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-22 02:14:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,835 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-22 02:14:19,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-22 02:14:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 02:14:19,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,837 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] [2020-08-22 02:14:19,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:14:19,838 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-22 02:14:19,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759059739] [2020-08-22 02:14:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:19,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759059739] [2020-08-22 02:14:19,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193681707] [2020-08-22 02:14:19,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,919 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-22 02:14:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,122 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-22 02:14:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-22 02:14:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,132 INFO L225 Difference]: With dead ends: 3946 [2020-08-22 02:14:20,132 INFO L226 Difference]: Without dead ends: 2096 [2020-08-22 02:14:20,138 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 [2020-08-22 02:14:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-22 02:14:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-22 02:14:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-22 02:14:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-22 02:14:20,207 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-22 02:14:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,208 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-22 02:14:20,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-22 02:14:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 02:14:20,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,211 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] [2020-08-22 02:14:20,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:14:20,211 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-22 02:14:20,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211026907] [2020-08-22 02:14:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 02:14:20,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211026907] [2020-08-22 02:14:20,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248674361] [2020-08-22 02:14:20,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,248 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-22 02:14:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,519 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-22 02:14:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-22 02:14:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,530 INFO L225 Difference]: With dead ends: 4276 [2020-08-22 02:14:20,531 INFO L226 Difference]: Without dead ends: 2293 [2020-08-22 02:14:20,535 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 [2020-08-22 02:14:20,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-22 02:14:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-22 02:14:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-22 02:14:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-22 02:14:20,614 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-22 02:14:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,615 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-22 02:14:20,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-22 02:14:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 02:14:20,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,617 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] [2020-08-22 02:14:20,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:14:20,617 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-22 02:14:20,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331441430] [2020-08-22 02:14:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 02:14:20,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331441430] [2020-08-22 02:14:20,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420827746] [2020-08-22 02:14:20,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,673 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-22 02:14:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,747 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-22 02:14:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-22 02:14:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,761 INFO L225 Difference]: With dead ends: 4420 [2020-08-22 02:14:20,762 INFO L226 Difference]: Without dead ends: 2947 [2020-08-22 02:14:20,766 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 [2020-08-22 02:14:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-22 02:14:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-22 02:14:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-22 02:14:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-22 02:14:20,886 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-22 02:14:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,887 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-22 02:14:20,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-22 02:14:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 02:14:20,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,888 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] [2020-08-22 02:14:20,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 02:14:20,889 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-22 02:14:20,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838915243] [2020-08-22 02:14:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 02:14:20,908 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 02:14:20,909 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 02:14:20,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 02:14:20,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:14:20 BoogieIcfgContainer [2020-08-22 02:14:20,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:14:20,943 INFO L168 Benchmark]: Toolchain (without parser) took 7832.00 ms. Allocated memory was 137.4 MB in the beginning and 357.0 MB in the end (delta: 219.7 MB). Free memory was 99.7 MB in the beginning and 292.2 MB in the end (delta: -192.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:20,943 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-22 02:14:20,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 535.62 ms. Allocated memory was 137.4 MB in the beginning and 198.2 MB in the end (delta: 60.8 MB). Free memory was 99.5 MB in the beginning and 172.8 MB in the end (delta: -73.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:20,945 INFO L168 Benchmark]: Boogie Preprocessor took 60.02 ms. Allocated memory is still 198.2 MB. Free memory was 172.8 MB in the beginning and 170.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:20,945 INFO L168 Benchmark]: RCFGBuilder took 870.68 ms. Allocated memory is still 198.2 MB. Free memory was 169.9 MB in the beginning and 116.9 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:20,946 INFO L168 Benchmark]: TraceAbstraction took 6360.86 ms. Allocated memory was 198.2 MB in the beginning and 357.0 MB in the end (delta: 158.9 MB). Free memory was 116.2 MB in the beginning and 292.2 MB in the end (delta: -176.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 02:14:20,948 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 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 535.62 ms. Allocated memory was 137.4 MB in the beginning and 198.2 MB in the end (delta: 60.8 MB). Free memory was 99.5 MB in the beginning and 172.8 MB in the end (delta: -73.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.02 ms. Allocated memory is still 198.2 MB. Free memory was 172.8 MB in the beginning and 170.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 870.68 ms. Allocated memory is still 198.2 MB. Free memory was 169.9 MB in the beginning and 116.9 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6360.86 ms. Allocated memory was 198.2 MB in the beginning and 357.0 MB in the end (delta: 158.9 MB). Free memory was 116.2 MB in the beginning and 292.2 MB in the end (delta: -176.0 MB). There was no memory consumed. 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: 6.2s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s 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...