/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:22:32,732 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 21:22:32,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:22:32,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:22:32,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:22:32,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:22:32,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:22:32,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:22:32,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:22:32,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:22:32,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:22:32,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:22:32,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:22:32,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:22:32,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:22:32,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:22:32,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:22:32,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:22:32,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:22:32,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:22:32,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:22:32,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:22:32,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:22:32,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:22:32,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:22:32,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:22:32,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:22:32,851 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:22:32,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:22:32,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:22:32,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:22:32,853 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:22:32,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:22:32,854 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:22:32,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:22:32,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:22:32,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:22:32,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:22:32,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:22:32,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:22:32,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:22:32,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:22:32,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:22:32,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:22:32,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:22:32,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:22:32,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:22:32,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:22:32,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:32,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:22:32,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:22:32,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:22:32,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:22:32,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:22:32,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:22:32,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:22:32,861 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=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:22:33,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:22:33,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:22:33,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:22:33,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:22:33,205 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:22:33,206 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 21:22:33,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa5f6254e/ab5e8bed50134f52b6e85fab2c049fcf/FLAGbea6d9079 [2020-08-21 21:22:33,792 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:22:33,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 21:22:33,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa5f6254e/ab5e8bed50134f52b6e85fab2c049fcf/FLAGbea6d9079 [2020-08-21 21:22:34,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa5f6254e/ab5e8bed50134f52b6e85fab2c049fcf [2020-08-21 21:22:34,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:22:34,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:22:34,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:34,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:22:34,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:22:34,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4517aa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34, skipping insertion in model container [2020-08-21 21:22:34,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:22:34,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:22:34,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:34,467 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:22:34,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:34,640 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:22:34,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34 WrapperNode [2020-08-21 21:22:34,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:34,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:22:34,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:22:34,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:22:34,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... [2020-08-21 21:22:34,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:22:34,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:22:34,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:22:34,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:22:34,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:34,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:22:34,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:22:34,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 21:22:34,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:22:34,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:22:34,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 21:22:34,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:22:34,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 21:22:34,803 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 21:22:34,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:22:34,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:22:34,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:22:35,053 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 21:22:35,537 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 21:22:35,538 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 21:22:35,550 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:22:35,550 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:22:35,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:35 BoogieIcfgContainer [2020-08-21 21:22:35,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:22:35,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:22:35,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:22:35,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:22:35,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:22:34" (1/3) ... [2020-08-21 21:22:35,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d6e8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:35, skipping insertion in model container [2020-08-21 21:22:35,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:34" (2/3) ... [2020-08-21 21:22:35,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d6e8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:35, skipping insertion in model container [2020-08-21 21:22:35,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:35" (3/3) ... [2020-08-21 21:22:35,565 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-21 21:22:35,576 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:22:35,585 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:22:35,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:22:35,627 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:22:35,628 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:22:35,628 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:22:35,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:22:35,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:22:35,629 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:22:35,629 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:22:35,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:22:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-21 21:22:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 21:22:35,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:35,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:35,679 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-21 21:22:35,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:35,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956481136] [2020-08-21 21:22:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:35,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956481136] [2020-08-21 21:22:35,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:35,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:22:35,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430851397] [2020-08-21 21:22:35,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:22:35,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:35,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:22:35,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:22:35,982 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-21 21:22:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:36,393 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-21 21:22:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:22:36,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 21:22:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:36,410 INFO L225 Difference]: With dead ends: 375 [2020-08-21 21:22:36,410 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 21:22:36,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:22:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 21:22:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-21 21:22:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 21:22:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-21 21:22:36,481 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-21 21:22:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:36,482 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-21 21:22:36,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:22:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-21 21:22:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 21:22:36,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:36,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:36,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:22:36,484 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:36,485 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-21 21:22:36,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:36,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140516856] [2020-08-21 21:22:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:36,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140516856] [2020-08-21 21:22:36,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:36,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:22:36,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193846526] [2020-08-21 21:22:36,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:22:36,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:22:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:22:36,582 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-21 21:22:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:36,916 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-21 21:22:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:22:36,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-21 21:22:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:36,920 INFO L225 Difference]: With dead ends: 448 [2020-08-21 21:22:36,920 INFO L226 Difference]: Without dead ends: 260 [2020-08-21 21:22:36,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:22:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-21 21:22:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-21 21:22:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-21 21:22:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-21 21:22:36,949 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-21 21:22:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:36,949 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-21 21:22:36,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:22:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-21 21:22:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 21:22:36,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:36,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:36,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:22:36,952 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:36,952 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-21 21:22:36,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:36,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039214542] [2020-08-21 21:22:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:37,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039214542] [2020-08-21 21:22:37,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752995339] [2020-08-21 21:22:37,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,027 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-21 21:22:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,059 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-21 21:22:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-21 21:22:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,064 INFO L225 Difference]: With dead ends: 698 [2020-08-21 21:22:37,064 INFO L226 Difference]: Without dead ends: 466 [2020-08-21 21:22:37,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-21 21:22:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-21 21:22:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-21 21:22:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-21 21:22:37,120 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-21 21:22:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,120 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-21 21:22:37,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-21 21:22:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 21:22:37,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:37,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:22:37,126 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-21 21:22:37,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864001268] [2020-08-21 21:22:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:37,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864001268] [2020-08-21 21:22:37,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:22:37,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315598795] [2020-08-21 21:22:37,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:22:37,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:22:37,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:22:37,304 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-21 21:22:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,637 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-21 21:22:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:22:37,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 21:22:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,646 INFO L225 Difference]: With dead ends: 1155 [2020-08-21 21:22:37,646 INFO L226 Difference]: Without dead ends: 655 [2020-08-21 21:22:37,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:22:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-21 21:22:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-21 21:22:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 21:22:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-21 21:22:37,688 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-21 21:22:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,689 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-21 21:22:37,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:22:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-21 21:22:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 21:22:37,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:37,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:22:37,695 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-21 21:22:37,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970206214] [2020-08-21 21:22:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:37,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970206214] [2020-08-21 21:22:37,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458725291] [2020-08-21 21:22:37,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,783 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-21 21:22:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,807 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-21 21:22:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-21 21:22:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,811 INFO L225 Difference]: With dead ends: 1038 [2020-08-21 21:22:37,811 INFO L226 Difference]: Without dead ends: 526 [2020-08-21 21:22:37,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-21 21:22:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-21 21:22:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 21:22:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-21 21:22:37,836 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-21 21:22:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,838 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-21 21:22:37,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-21 21:22:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 21:22:37,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:37,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:22:37,842 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-21 21:22:37,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396939563] [2020-08-21 21:22:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:37,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396939563] [2020-08-21 21:22:37,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890546315] [2020-08-21 21:22:37,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,926 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-21 21:22:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,966 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-21 21:22:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 21:22:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,970 INFO L225 Difference]: With dead ends: 1048 [2020-08-21 21:22:37,970 INFO L226 Difference]: Without dead ends: 536 [2020-08-21 21:22:37,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-21 21:22:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-21 21:22:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-21 21:22:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-21 21:22:37,993 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-21 21:22:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,993 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-21 21:22:37,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-21 21:22:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 21:22:37,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:37,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:22:37,995 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-21 21:22:37,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546420994] [2020-08-21 21:22:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:38,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546420994] [2020-08-21 21:22:38,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866634613] [2020-08-21 21:22:38,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,051 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-21 21:22:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,258 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-21 21:22:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-21 21:22:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,263 INFO L225 Difference]: With dead ends: 1234 [2020-08-21 21:22:38,263 INFO L226 Difference]: Without dead ends: 670 [2020-08-21 21:22:38,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-21 21:22:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-21 21:22:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-21 21:22:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-21 21:22:38,288 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-21 21:22:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,288 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-21 21:22:38,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-21 21:22:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 21:22:38,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,290 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:38,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:22:38,290 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-21 21:22:38,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671312461] [2020-08-21 21:22:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:38,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671312461] [2020-08-21 21:22:38,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545714634] [2020-08-21 21:22:38,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,338 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-21 21:22:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,378 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-21 21:22:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 21:22:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,385 INFO L225 Difference]: With dead ends: 1720 [2020-08-21 21:22:38,385 INFO L226 Difference]: Without dead ends: 1149 [2020-08-21 21:22:38,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-21 21:22:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-21 21:22:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-21 21:22:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-21 21:22:38,424 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-21 21:22:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,424 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-21 21:22:38,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-21 21:22:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 21:22:38,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:38,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:22:38,426 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-21 21:22:38,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434727396] [2020-08-21 21:22:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:38,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434727396] [2020-08-21 21:22:38,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587531266] [2020-08-21 21:22:38,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,475 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-21 21:22:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,533 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-21 21:22:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 21:22:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,542 INFO L225 Difference]: With dead ends: 2602 [2020-08-21 21:22:38,543 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 21:22:38,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 21:22:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-21 21:22:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-21 21:22:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-21 21:22:38,649 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-21 21:22:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,650 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-21 21:22:38,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-21 21:22:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 21:22:38,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:38,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:22:38,652 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,653 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-21 21:22:38,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245357159] [2020-08-21 21:22:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:38,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245357159] [2020-08-21 21:22:38,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752715680] [2020-08-21 21:22:38,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,701 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-21 21:22:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,892 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-21 21:22:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 21:22:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,902 INFO L225 Difference]: With dead ends: 3635 [2020-08-21 21:22:38,903 INFO L226 Difference]: Without dead ends: 1924 [2020-08-21 21:22:38,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-21 21:22:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-21 21:22:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 21:22:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-21 21:22:38,979 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-21 21:22:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,979 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-21 21:22:38,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-21 21:22:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:22:38,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:38,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:22:38,982 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,982 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-21 21:22:38,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553150417] [2020-08-21 21:22:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:39,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553150417] [2020-08-21 21:22:39,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:39,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82915932] [2020-08-21 21:22:39,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:39,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,023 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-21 21:22:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:39,224 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-21 21:22:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:39,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 21:22:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:39,272 INFO L225 Difference]: With dead ends: 3747 [2020-08-21 21:22:39,272 INFO L226 Difference]: Without dead ends: 1933 [2020-08-21 21:22:39,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-21 21:22:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-21 21:22:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 21:22:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-21 21:22:39,345 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-21 21:22:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:39,346 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-21 21:22:39,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-21 21:22:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:22:39,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:39,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:39,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:22:39,348 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:39,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-21 21:22:39,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:39,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098475074] [2020-08-21 21:22:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:39,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098475074] [2020-08-21 21:22:39,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:39,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446400838] [2020-08-21 21:22:39,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:39,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,396 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-21 21:22:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:39,595 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-21 21:22:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:39,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 21:22:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:39,605 INFO L225 Difference]: With dead ends: 3744 [2020-08-21 21:22:39,606 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 21:22:39,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 21:22:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-21 21:22:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 21:22:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-21 21:22:39,686 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-21 21:22:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:39,688 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-21 21:22:39,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-21 21:22:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 21:22:39,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:39,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:39,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:22:39,690 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:39,690 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-21 21:22:39,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:39,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797877421] [2020-08-21 21:22:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:39,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797877421] [2020-08-21 21:22:39,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:39,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913783417] [2020-08-21 21:22:39,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:39,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:39,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,751 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-21 21:22:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:39,984 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-21 21:22:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:39,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-21 21:22:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:39,994 INFO L225 Difference]: With dead ends: 3741 [2020-08-21 21:22:39,994 INFO L226 Difference]: Without dead ends: 1891 [2020-08-21 21:22:39,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-21 21:22:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-21 21:22:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 21:22:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-21 21:22:40,071 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-21 21:22:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:40,072 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-21 21:22:40,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-21 21:22:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:22:40,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:40,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:40,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:22:40,075 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-21 21:22:40,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:40,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816891196] [2020-08-21 21:22:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:40,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816891196] [2020-08-21 21:22:40,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:40,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:40,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006134060] [2020-08-21 21:22:40,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:40,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,136 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-21 21:22:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:40,322 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-21 21:22:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:40,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-21 21:22:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:40,332 INFO L225 Difference]: With dead ends: 3810 [2020-08-21 21:22:40,333 INFO L226 Difference]: Without dead ends: 1960 [2020-08-21 21:22:40,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-21 21:22:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-21 21:22:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 21:22:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-21 21:22:40,411 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-21 21:22:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:40,411 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-21 21:22:40,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-21 21:22:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 21:22:40,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:40,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:40,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:22:40,417 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:40,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-21 21:22:40,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:40,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324316141] [2020-08-21 21:22:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:40,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324316141] [2020-08-21 21:22:40,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:40,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:40,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946257211] [2020-08-21 21:22:40,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:40,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:40,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,481 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-21 21:22:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:40,697 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-21 21:22:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:40,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-21 21:22:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:40,709 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 21:22:40,710 INFO L226 Difference]: Without dead ends: 2096 [2020-08-21 21:22:40,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-21 21:22:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-21 21:22:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-21 21:22:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-21 21:22:40,832 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-21 21:22:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:40,832 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-21 21:22:40,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-21 21:22:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 21:22:40,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:40,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:40,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:22:40,836 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-21 21:22:40,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:40,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996337315] [2020-08-21 21:22:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 21:22:40,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996337315] [2020-08-21 21:22:40,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:40,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:40,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670784337] [2020-08-21 21:22:40,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:40,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:40,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,873 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-21 21:22:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:41,085 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-21 21:22:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:41,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 21:22:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:41,096 INFO L225 Difference]: With dead ends: 4276 [2020-08-21 21:22:41,096 INFO L226 Difference]: Without dead ends: 2293 [2020-08-21 21:22:41,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-21 21:22:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-21 21:22:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-21 21:22:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-21 21:22:41,178 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-21 21:22:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:41,178 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-21 21:22:41,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:41,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-21 21:22:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 21:22:41,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:41,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:41,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:22:41,181 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-21 21:22:41,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:41,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251328404] [2020-08-21 21:22:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 21:22:41,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251328404] [2020-08-21 21:22:41,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:41,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:41,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740587594] [2020-08-21 21:22:41,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:41,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:41,238 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-21 21:22:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:41,324 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-21 21:22:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:41,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 21:22:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:41,341 INFO L225 Difference]: With dead ends: 4420 [2020-08-21 21:22:41,341 INFO L226 Difference]: Without dead ends: 2947 [2020-08-21 21:22:41,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-21 21:22:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-21 21:22:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-21 21:22:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-21 21:22:41,494 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-21 21:22:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:41,495 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-21 21:22:41,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-21 21:22:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 21:22:41,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:41,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:41,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 21:22:41,497 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-21 21:22:41,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:41,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887004809] [2020-08-21 21:22:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:22:41,524 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:22:41,524 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:22:41,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 21:22:41,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:22:41 BoogieIcfgContainer [2020-08-21 21:22:41,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:22:41,580 INFO L168 Benchmark]: Toolchain (without parser) took 7457.40 ms. Allocated memory was 148.4 MB in the beginning and 367.0 MB in the end (delta: 218.6 MB). Free memory was 103.8 MB in the beginning and 313.8 MB in the end (delta: -210.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:41,581 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 21:22:41,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 523.47 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 103.8 MB in the beginning and 180.6 MB in the end (delta: -76.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:41,586 INFO L168 Benchmark]: Boogie Preprocessor took 91.06 ms. Allocated memory is still 205.5 MB. Free memory was 180.6 MB in the beginning and 177.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:41,589 INFO L168 Benchmark]: RCFGBuilder took 823.52 ms. Allocated memory is still 205.5 MB. Free memory was 177.7 MB in the beginning and 124.4 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:41,589 INFO L168 Benchmark]: TraceAbstraction took 6014.68 ms. Allocated memory was 205.5 MB in the beginning and 367.0 MB in the end (delta: 161.5 MB). Free memory was 123.5 MB in the beginning and 313.8 MB in the end (delta: -190.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:22:41,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 523.47 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 103.8 MB in the beginning and 180.6 MB in the end (delta: -76.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.06 ms. Allocated memory is still 205.5 MB. Free memory was 180.6 MB in the beginning and 177.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 823.52 ms. Allocated memory is still 205.5 MB. Free memory was 177.7 MB in the beginning and 124.4 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6014.68 ms. Allocated memory was 205.5 MB in the beginning and 367.0 MB in the end (delta: 161.5 MB). Free memory was 123.5 MB in the beginning and 313.8 MB in the end (delta: -190.3 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: 5.9s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s 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...