/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 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 14:07:34,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:07:34,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:07:34,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 14:07:34,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:07:34,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:07:34,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:07:34,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:07:34,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:07:34,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:07:34,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:07:34,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:07:34,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:07:34,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:07:34,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:07:34,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:07:34,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:07:34,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:07:34,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:07:34,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:07:34,796 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 14:07:34,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:07:34,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:07:34,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:07:34,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:07:34,838 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:07:34,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:07:34,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:07:34,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:07:34,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:07:34,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:07:34,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:07:34,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:07:34,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:07:34,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:07:34,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:07:34,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:07:34,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:07:34,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:07:34,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:07:34,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:07:34,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:07:34,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:34,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:07:34,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:07:34,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:07:34,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:07:34,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:07:34,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:07:34,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:07:34,843 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 -> log-additional-information=true; [2020-08-21 14:07:35,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:07:35,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:07:35,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:07:35,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:07:35,181 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:07:35,182 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 14:07:35,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a78371d/cb5c46b6d09a4b5e864d597e2a1a0f42/FLAGef667cda7 [2020-08-21 14:07:35,787 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:07:35,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 14:07:35,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a78371d/cb5c46b6d09a4b5e864d597e2a1a0f42/FLAGef667cda7 [2020-08-21 14:07:36,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a78371d/cb5c46b6d09a4b5e864d597e2a1a0f42 [2020-08-21 14:07:36,163 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:07:36,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:07:36,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:36,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:07:36,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:07:36,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336c4a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36, skipping insertion in model container [2020-08-21 14:07:36,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:07:36,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:07:36,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:36,679 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:07:36,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:36,781 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:07:36,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36 WrapperNode [2020-08-21 14:07:36,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:36,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:07:36,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:07:36,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:07:36,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (1/1) ... [2020-08-21 14:07:36,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:07:36,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:07:36,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:07:36,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:07:36,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (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 14:07:36,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:07:36,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:07:36,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 14:07:36,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:07:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:07:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 14:07:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:07:36,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 14:07:36,921 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 14:07:36,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:07:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:07:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:07:37,140 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:07:37,653 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 14:07:37,654 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 14:07:37,666 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:07:37,666 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:07:37,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:37 BoogieIcfgContainer [2020-08-21 14:07:37,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:07:37,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:07:37,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:07:37,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:07:37,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:07:36" (1/3) ... [2020-08-21 14:07:37,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63506068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:37, skipping insertion in model container [2020-08-21 14:07:37,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:36" (2/3) ... [2020-08-21 14:07:37,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63506068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:37, skipping insertion in model container [2020-08-21 14:07:37,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:37" (3/3) ... [2020-08-21 14:07:37,681 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-21 14:07:37,694 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:07:37,706 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:07:37,720 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:07:37,757 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:07:37,757 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:07:37,758 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:07:37,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:07:37,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:07:37,758 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:07:37,758 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:07:37,759 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:07:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-21 14:07:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:37,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:37,800 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 14:07:37,800 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-21 14:07:37,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:37,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558501159] [2020-08-21 14:07:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,127 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 14:07:38,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558501159] [2020-08-21 14:07:38,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:38,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:07:38,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971153923] [2020-08-21 14:07:38,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:07:38,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:38,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:07:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:07:38,156 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-21 14:07:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:38,632 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-21 14:07:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:07:38,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 14:07:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:38,649 INFO L225 Difference]: With dead ends: 375 [2020-08-21 14:07:38,649 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 14:07:38,655 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 14:07:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 14:07:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-21 14:07:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 14:07:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-21 14:07:38,717 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-21 14:07:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:38,718 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-21 14:07:38,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:07:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-21 14:07:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:07:38,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:38,720 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 14:07:38,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:07:38,721 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-21 14:07:38,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:38,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723432802] [2020-08-21 14:07:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,840 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 14:07:38,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723432802] [2020-08-21 14:07:38,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:38,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:07:38,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303291330] [2020-08-21 14:07:38,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:07:38,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:38,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:07:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:07:38,844 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-21 14:07:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:39,195 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-21 14:07:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:07:39,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-21 14:07:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:39,200 INFO L225 Difference]: With dead ends: 448 [2020-08-21 14:07:39,200 INFO L226 Difference]: Without dead ends: 260 [2020-08-21 14:07:39,202 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 14:07:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-21 14:07:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-21 14:07:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-21 14:07:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-21 14:07:39,229 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-21 14:07:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:39,229 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-21 14:07:39,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:07:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-21 14:07:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 14:07:39,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,231 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 14:07:39,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:07:39,232 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,232 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-21 14:07:39,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663766972] [2020-08-21 14:07:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,308 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 14:07:39,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663766972] [2020-08-21 14:07:39,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:39,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:39,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554663523] [2020-08-21 14:07:39,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:39,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:39,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:39,312 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-21 14:07:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:39,349 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-21 14:07:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:39,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-21 14:07:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:39,354 INFO L225 Difference]: With dead ends: 698 [2020-08-21 14:07:39,354 INFO L226 Difference]: Without dead ends: 466 [2020-08-21 14:07:39,357 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 14:07:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-21 14:07:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-21 14:07:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-21 14:07:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-21 14:07:39,397 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-21 14:07:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:39,398 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-21 14:07:39,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-21 14:07:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 14:07:39,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,400 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 14:07:39,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:07:39,401 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-21 14:07:39,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507419401] [2020-08-21 14:07:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,508 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 14:07:39,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507419401] [2020-08-21 14:07:39,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:39,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:07:39,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659672933] [2020-08-21 14:07:39,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:07:39,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:07:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:07:39,511 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-21 14:07:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:39,864 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-21 14:07:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:07:39,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 14:07:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:39,870 INFO L225 Difference]: With dead ends: 1155 [2020-08-21 14:07:39,870 INFO L226 Difference]: Without dead ends: 655 [2020-08-21 14:07:39,873 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 14:07:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-21 14:07:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-21 14:07:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 14:07:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-21 14:07:39,906 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-21 14:07:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:39,907 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-21 14:07:39,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:07:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-21 14:07:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 14:07:39,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,915 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 14:07:39,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:07:39,916 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-21 14:07:39,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375124156] [2020-08-21 14:07:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,011 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 14:07:40,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375124156] [2020-08-21 14:07:40,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753978786] [2020-08-21 14:07:40,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,014 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-21 14:07:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,036 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-21 14:07:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-21 14:07:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,040 INFO L225 Difference]: With dead ends: 1038 [2020-08-21 14:07:40,040 INFO L226 Difference]: Without dead ends: 526 [2020-08-21 14:07:40,042 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 14:07:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-21 14:07:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-21 14:07:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 14:07:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-21 14:07:40,067 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-21 14:07:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,070 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-21 14:07:40,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-21 14:07:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:07:40,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,074 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 14:07:40,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:07:40,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-21 14:07:40,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192985579] [2020-08-21 14:07:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,146 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 14:07:40,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192985579] [2020-08-21 14:07:40,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415115398] [2020-08-21 14:07:40,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,151 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-21 14:07:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,187 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-21 14:07:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 14:07:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,192 INFO L225 Difference]: With dead ends: 1048 [2020-08-21 14:07:40,193 INFO L226 Difference]: Without dead ends: 536 [2020-08-21 14:07:40,194 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 14:07:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-21 14:07:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-21 14:07:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-21 14:07:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-21 14:07:40,224 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-21 14:07:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,224 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-21 14:07:40,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-21 14:07:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 14:07:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,227 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 14:07:40,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:07:40,227 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-21 14:07:40,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281677037] [2020-08-21 14:07:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,287 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 14:07:40,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281677037] [2020-08-21 14:07:40,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677522900] [2020-08-21 14:07:40,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,290 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-21 14:07:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,577 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-21 14:07:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-21 14:07:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,583 INFO L225 Difference]: With dead ends: 1234 [2020-08-21 14:07:40,584 INFO L226 Difference]: Without dead ends: 670 [2020-08-21 14:07:40,586 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 14:07:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-21 14:07:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-21 14:07:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-21 14:07:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-21 14:07:40,621 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-21 14:07:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,621 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-21 14:07:40,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-21 14:07:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:07:40,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,623 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 14:07:40,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:07:40,623 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-21 14:07:40,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437617371] [2020-08-21 14:07:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,721 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 14:07:40,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437617371] [2020-08-21 14:07:40,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327947911] [2020-08-21 14:07:40,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,726 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-21 14:07:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,789 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-21 14:07:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 14:07:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,800 INFO L225 Difference]: With dead ends: 1720 [2020-08-21 14:07:40,800 INFO L226 Difference]: Without dead ends: 1149 [2020-08-21 14:07:40,803 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 14:07:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-21 14:07:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-21 14:07:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-21 14:07:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-21 14:07:40,849 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-21 14:07:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,849 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-21 14:07:40,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-21 14:07:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:07:40,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,850 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 14:07:40,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:07:40,851 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-21 14:07:40,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076533747] [2020-08-21 14:07:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,906 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 14:07:40,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076533747] [2020-08-21 14:07:40,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136088965] [2020-08-21 14:07:40,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,911 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-21 14:07:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,981 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-21 14:07:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 14:07:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,992 INFO L225 Difference]: With dead ends: 2602 [2020-08-21 14:07:40,992 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 14:07:40,996 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 14:07:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 14:07:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-21 14:07:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-21 14:07:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-21 14:07:41,094 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-21 14:07:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,094 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-21 14:07:41,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-21 14:07:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 14:07:41,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,097 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 14:07:41,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:07:41,097 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,097 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-21 14:07:41,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304906434] [2020-08-21 14:07:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,148 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 14:07:41,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304906434] [2020-08-21 14:07:41,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649016063] [2020-08-21 14:07:41,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,152 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-21 14:07:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,372 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-21 14:07:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 14:07:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,387 INFO L225 Difference]: With dead ends: 3635 [2020-08-21 14:07:41,387 INFO L226 Difference]: Without dead ends: 1924 [2020-08-21 14:07:41,396 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 14:07:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-21 14:07:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-21 14:07:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 14:07:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-21 14:07:41,496 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-21 14:07:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,496 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-21 14:07:41,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-21 14:07:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 14:07:41,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,499 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 14:07:41,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:07:41,500 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-21 14:07:41,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314422734] [2020-08-21 14:07:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,575 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 14:07:41,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314422734] [2020-08-21 14:07:41,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848613915] [2020-08-21 14:07:41,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,579 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-21 14:07:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,822 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-21 14:07:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 14:07:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,834 INFO L225 Difference]: With dead ends: 3747 [2020-08-21 14:07:41,834 INFO L226 Difference]: Without dead ends: 1933 [2020-08-21 14:07:41,838 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 14:07:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-21 14:07:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-21 14:07:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 14:07:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-21 14:07:41,939 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-21 14:07:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,940 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-21 14:07:41,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-21 14:07:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 14:07:41,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,942 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 14:07:41,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:07:41,943 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-21 14:07:41,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803990819] [2020-08-21 14:07:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,038 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 14:07:42,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803990819] [2020-08-21 14:07:42,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299297662] [2020-08-21 14:07:42,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,040 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-21 14:07:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,277 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-21 14:07:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 14:07:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,287 INFO L225 Difference]: With dead ends: 3744 [2020-08-21 14:07:42,288 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 14:07:42,295 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 14:07:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 14:07:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-21 14:07:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 14:07:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-21 14:07:42,365 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-21 14:07:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,366 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-21 14:07:42,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-21 14:07:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:07:42,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,367 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 14:07:42,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:07:42,368 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-21 14:07:42,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031628822] [2020-08-21 14:07:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,409 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 14:07:42,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031628822] [2020-08-21 14:07:42,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964206508] [2020-08-21 14:07:42,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,412 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-21 14:07:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,621 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-21 14:07:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-21 14:07:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,631 INFO L225 Difference]: With dead ends: 3741 [2020-08-21 14:07:42,632 INFO L226 Difference]: Without dead ends: 1891 [2020-08-21 14:07:42,636 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 14:07:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-21 14:07:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-21 14:07:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 14:07:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-21 14:07:42,705 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-21 14:07:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,705 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-21 14:07:42,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-21 14:07:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:07:42,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,707 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 14:07:42,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:07:42,707 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-21 14:07:42,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088396520] [2020-08-21 14:07:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,777 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 14:07:42,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088396520] [2020-08-21 14:07:42,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334137468] [2020-08-21 14:07:42,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,780 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-21 14:07:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,985 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-21 14:07:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-21 14:07:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,995 INFO L225 Difference]: With dead ends: 3810 [2020-08-21 14:07:42,996 INFO L226 Difference]: Without dead ends: 1960 [2020-08-21 14:07:43,000 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 14:07:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-21 14:07:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-21 14:07:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 14:07:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-21 14:07:43,065 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-21 14:07:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:43,066 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-21 14:07:43,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-21 14:07:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 14:07:43,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:43,068 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 14:07:43,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:07:43,068 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-21 14:07:43,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:43,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516750639] [2020-08-21 14:07:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,120 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 14:07:43,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516750639] [2020-08-21 14:07:43,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:43,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:43,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632948165] [2020-08-21 14:07:43,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:43,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:43,123 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-21 14:07:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:43,322 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-21 14:07:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:43,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-21 14:07:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:43,335 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 14:07:43,335 INFO L226 Difference]: Without dead ends: 2096 [2020-08-21 14:07:43,343 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 14:07:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-21 14:07:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-21 14:07:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-21 14:07:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-21 14:07:43,452 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-21 14:07:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:43,453 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-21 14:07:43,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-21 14:07:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:07:43,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:43,459 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 14:07:43,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:07:43,459 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:43,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-21 14:07:43,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:43,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798214797] [2020-08-21 14:07:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,517 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 14:07:43,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798214797] [2020-08-21 14:07:43,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:43,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:43,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689097590] [2020-08-21 14:07:43,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:43,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:43,522 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-21 14:07:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:43,904 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-21 14:07:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:43,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 14:07:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:43,917 INFO L225 Difference]: With dead ends: 4276 [2020-08-21 14:07:43,917 INFO L226 Difference]: Without dead ends: 2293 [2020-08-21 14:07:43,921 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 14:07:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-21 14:07:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-21 14:07:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-21 14:07:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-21 14:07:44,005 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-21 14:07:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,005 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-21 14:07:44,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-21 14:07:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:07:44,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,007 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 14:07:44,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:07:44,007 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-21 14:07:44,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533248133] [2020-08-21 14:07:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,082 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 14:07:44,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533248133] [2020-08-21 14:07:44,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991379506] [2020-08-21 14:07:44,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,086 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-21 14:07:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,164 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-21 14:07:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 14:07:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,179 INFO L225 Difference]: With dead ends: 4420 [2020-08-21 14:07:44,180 INFO L226 Difference]: Without dead ends: 2947 [2020-08-21 14:07:44,184 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 14:07:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-21 14:07:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-21 14:07:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-21 14:07:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-21 14:07:44,292 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-21 14:07:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,293 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-21 14:07:44,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-21 14:07:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 14:07:44,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,296 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 14:07:44,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:07:44,297 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-21 14:07:44,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514159072] [2020-08-21 14:07:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:07:44,339 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:07:44,340 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:07:44,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:07:44,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:07:44 BoogieIcfgContainer [2020-08-21 14:07:44,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:07:44,396 INFO L168 Benchmark]: Toolchain (without parser) took 8224.94 ms. Allocated memory was 147.8 MB in the beginning and 327.7 MB in the end (delta: 179.8 MB). Free memory was 102.7 MB in the beginning and 136.8 MB in the end (delta: -34.2 MB). Peak memory consumption was 145.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:44,397 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 147.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-21 14:07:44,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.65 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 102.5 MB in the beginning and 177.9 MB in the end (delta: -75.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:44,402 INFO L168 Benchmark]: Boogie Preprocessor took 71.36 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 175.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:44,404 INFO L168 Benchmark]: RCFGBuilder took 818.35 ms. Allocated memory is still 203.4 MB. Free memory was 175.0 MB in the beginning and 122.3 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:44,405 INFO L168 Benchmark]: TraceAbstraction took 6713.54 ms. Allocated memory was 203.4 MB in the beginning and 327.7 MB in the end (delta: 124.3 MB). Free memory was 121.7 MB in the beginning and 136.8 MB in the end (delta: -15.1 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:44,411 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 147.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 616.65 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 102.5 MB in the beginning and 177.9 MB in the end (delta: -75.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.36 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 175.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 818.35 ms. Allocated memory is still 203.4 MB. Free memory was 175.0 MB in the beginning and 122.3 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6713.54 ms. Allocated memory was 203.4 MB in the beginning and 327.7 MB in the end (delta: 124.3 MB). Free memory was 121.7 MB in the beginning and 136.8 MB in the end (delta: -15.1 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.5s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...