/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:26,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:26,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:26,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:26,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:26,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:26,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:26,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:26,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:26,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:26,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:26,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:26,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:26,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:26,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:26,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:26,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:26,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:26,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:26,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:26,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:26,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:26,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:26,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:26,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:26,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:20:26,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:20:26,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:20:26,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:20:26,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:20:26,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:20:26,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:20:26,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:20:26,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:26,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:26,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:26,539 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 [2020-09-21 10:20:26,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:26,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:26,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:26,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:26,585 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:26,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:26,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:26,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:26,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:26,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:26,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:26,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:26,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:26,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:26,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:26,590 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:26,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:26,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:26,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:26,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:26,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:26,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:26,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:26,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:26,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:26,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:26,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:26,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:26,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:26,592 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 -> false [2020-09-21 10:20:27,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:27,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:27,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:27,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:27,142 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:27,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-21 10:20:27,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50967468b/b3e535b6b48147b3a11d77a1940277ec/FLAG6ec715748 [2020-09-21 10:20:27,870 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:27,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-21 10:20:27,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50967468b/b3e535b6b48147b3a11d77a1940277ec/FLAG6ec715748 [2020-09-21 10:20:28,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50967468b/b3e535b6b48147b3a11d77a1940277ec [2020-09-21 10:20:28,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:28,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:28,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:28,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:28,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:28,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693e2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28, skipping insertion in model container [2020-09-21 10:20:28,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:28,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:28,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:28,631 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:28,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:28,865 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:28,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28 WrapperNode [2020-09-21 10:20:28,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:28,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:28,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:28,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:28,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (1/1) ... [2020-09-21 10:20:28,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:28,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:28,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:28,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:28,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (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 [2020-09-21 10:20:29,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:29,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:29,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-21 10:20:29,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:20:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-21 10:20:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-09-21 10:20:29,035 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-21 10:20:29,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:29,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:29,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:29,260 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:30,007 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-21 10:20:30,008 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-21 10:20:30,026 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:30,027 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:30,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:30 BoogieIcfgContainer [2020-09-21 10:20:30,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:30,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:30,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:30,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:30,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:28" (1/3) ... [2020-09-21 10:20:30,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786986bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:30, skipping insertion in model container [2020-09-21 10:20:30,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:28" (2/3) ... [2020-09-21 10:20:30,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786986bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:30, skipping insertion in model container [2020-09-21 10:20:30,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:30" (3/3) ... [2020-09-21 10:20:30,046 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-09-21 10:20:30,057 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:30,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:30,088 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:30,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:30,123 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:30,123 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:30,123 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:30,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:30,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:30,124 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:30,124 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-09-21 10:20:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 10:20:30,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:30,165 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] [2020-09-21 10:20:30,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:30,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-09-21 10:20:30,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:30,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830751706] [2020-09-21 10:20:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:30,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830751706] [2020-09-21 10:20:30,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:30,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:30,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789994493] [2020-09-21 10:20:30,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:30,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:30,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:30,551 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-09-21 10:20:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:30,986 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-09-21 10:20:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:30,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-21 10:20:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:31,007 INFO L225 Difference]: With dead ends: 362 [2020-09-21 10:20:31,008 INFO L226 Difference]: Without dead ends: 179 [2020-09-21 10:20:31,014 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 [2020-09-21 10:20:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-21 10:20:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-09-21 10:20:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-21 10:20:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-09-21 10:20:31,089 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-09-21 10:20:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:31,089 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-09-21 10:20:31,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-09-21 10:20:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:20:31,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:31,092 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, 1] [2020-09-21 10:20:31,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:31,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:31,093 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-09-21 10:20:31,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:31,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708303050] [2020-09-21 10:20:31,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:31,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708303050] [2020-09-21 10:20:31,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:31,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:31,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637956792] [2020-09-21 10:20:31,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:31,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:31,255 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-09-21 10:20:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:31,492 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-09-21 10:20:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:31,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-21 10:20:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:31,499 INFO L225 Difference]: With dead ends: 363 [2020-09-21 10:20:31,502 INFO L226 Difference]: Without dead ends: 199 [2020-09-21 10:20:31,505 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 [2020-09-21 10:20:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-21 10:20:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-09-21 10:20:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-09-21 10:20:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-09-21 10:20:31,537 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-09-21 10:20:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:31,537 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-09-21 10:20:31,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-09-21 10:20:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:20:31,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:31,540 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, 1] [2020-09-21 10:20:31,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:31,540 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-09-21 10:20:31,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:31,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448481982] [2020-09-21 10:20:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:31,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448481982] [2020-09-21 10:20:31,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:31,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:31,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375418784] [2020-09-21 10:20:31,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:31,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:31,659 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-09-21 10:20:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:31,949 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-09-21 10:20:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:31,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-21 10:20:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:31,953 INFO L225 Difference]: With dead ends: 393 [2020-09-21 10:20:31,953 INFO L226 Difference]: Without dead ends: 207 [2020-09-21 10:20:31,960 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 [2020-09-21 10:20:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-21 10:20:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-09-21 10:20:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-21 10:20:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-09-21 10:20:31,992 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-09-21 10:20:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:31,993 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-09-21 10:20:31,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-09-21 10:20:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:20:31,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:31,997 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, 1] [2020-09-21 10:20:32,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:32,000 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-09-21 10:20:32,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:32,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800628779] [2020-09-21 10:20:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:32,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800628779] [2020-09-21 10:20:32,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:32,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:32,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757382773] [2020-09-21 10:20:32,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:32,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:32,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:32,170 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-09-21 10:20:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:32,405 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-09-21 10:20:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:32,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-21 10:20:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:32,408 INFO L225 Difference]: With dead ends: 398 [2020-09-21 10:20:32,408 INFO L226 Difference]: Without dead ends: 206 [2020-09-21 10:20:32,410 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 [2020-09-21 10:20:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-21 10:20:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-09-21 10:20:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-21 10:20:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-09-21 10:20:32,428 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-09-21 10:20:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:32,428 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-09-21 10:20:32,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-09-21 10:20:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 10:20:32,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:32,432 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, 1, 1] [2020-09-21 10:20:32,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:32,432 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-09-21 10:20:32,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:32,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957863948] [2020-09-21 10:20:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:32,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957863948] [2020-09-21 10:20:32,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:32,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:32,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457463124] [2020-09-21 10:20:32,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:32,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:32,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:32,517 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-09-21 10:20:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:32,724 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-09-21 10:20:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:32,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-09-21 10:20:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:32,726 INFO L225 Difference]: With dead ends: 409 [2020-09-21 10:20:32,727 INFO L226 Difference]: Without dead ends: 216 [2020-09-21 10:20:32,728 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 [2020-09-21 10:20:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-21 10:20:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-09-21 10:20:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-21 10:20:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-09-21 10:20:32,739 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-09-21 10:20:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:32,739 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-09-21 10:20:32,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-09-21 10:20:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 10:20:32,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:32,741 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, 1, 1, 1] [2020-09-21 10:20:32,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:32,741 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-09-21 10:20:32,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:32,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212472598] [2020-09-21 10:20:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:32,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212472598] [2020-09-21 10:20:32,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:32,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:32,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136317527] [2020-09-21 10:20:32,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:32,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:32,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:32,809 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-09-21 10:20:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:33,014 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-09-21 10:20:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:33,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-09-21 10:20:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:33,017 INFO L225 Difference]: With dead ends: 409 [2020-09-21 10:20:33,017 INFO L226 Difference]: Without dead ends: 216 [2020-09-21 10:20:33,018 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 [2020-09-21 10:20:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-21 10:20:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-09-21 10:20:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-21 10:20:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-09-21 10:20:33,029 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-09-21 10:20:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,029 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-09-21 10:20:33,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-09-21 10:20:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:20:33,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,031 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, 1, 1, 1, 1] [2020-09-21 10:20:33,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:33,031 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,032 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-09-21 10:20:33,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675238170] [2020-09-21 10:20:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675238170] [2020-09-21 10:20:33,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:33,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923572090] [2020-09-21 10:20:33,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:33,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:33,107 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-09-21 10:20:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:33,339 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-09-21 10:20:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:33,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-09-21 10:20:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:33,341 INFO L225 Difference]: With dead ends: 409 [2020-09-21 10:20:33,341 INFO L226 Difference]: Without dead ends: 216 [2020-09-21 10:20:33,342 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 [2020-09-21 10:20:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-21 10:20:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-09-21 10:20:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-21 10:20:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-09-21 10:20:33,354 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-09-21 10:20:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,355 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-09-21 10:20:33,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-09-21 10:20:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:20:33,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,356 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, 1, 1, 1, 1] [2020-09-21 10:20:33,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:33,357 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-09-21 10:20:33,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500876762] [2020-09-21 10:20:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500876762] [2020-09-21 10:20:33,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:20:33,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333214657] [2020-09-21 10:20:33,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:20:33,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:20:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:20:33,431 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-09-21 10:20:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:33,792 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-09-21 10:20:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:20:33,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-09-21 10:20:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:33,795 INFO L225 Difference]: With dead ends: 605 [2020-09-21 10:20:33,796 INFO L226 Difference]: Without dead ends: 412 [2020-09-21 10:20:33,797 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 [2020-09-21 10:20:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-09-21 10:20:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-09-21 10:20:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-09-21 10:20:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-09-21 10:20:33,818 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-09-21 10:20:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,818 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-09-21 10:20:33,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:20:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-09-21 10:20:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 10:20:33,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:33,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:33,820 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-09-21 10:20:33,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669075092] [2020-09-21 10:20:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669075092] [2020-09-21 10:20:33,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:33,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114735893] [2020-09-21 10:20:33,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:33,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:33,894 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-09-21 10:20:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:34,178 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-09-21 10:20:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:34,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-09-21 10:20:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:34,182 INFO L225 Difference]: With dead ends: 847 [2020-09-21 10:20:34,182 INFO L226 Difference]: Without dead ends: 472 [2020-09-21 10:20:34,184 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 [2020-09-21 10:20:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-09-21 10:20:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-09-21 10:20:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-09-21 10:20:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-09-21 10:20:34,208 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-09-21 10:20:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:34,208 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-09-21 10:20:34,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-09-21 10:20:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 10:20:34,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:34,210 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:34,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:34,210 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-09-21 10:20:34,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:34,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208762190] [2020-09-21 10:20:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:34,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208762190] [2020-09-21 10:20:34,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:34,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:34,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772296154] [2020-09-21 10:20:34,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:34,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:34,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:34,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:34,294 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-09-21 10:20:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:34,555 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-09-21 10:20:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:34,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-09-21 10:20:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:34,559 INFO L225 Difference]: With dead ends: 936 [2020-09-21 10:20:34,559 INFO L226 Difference]: Without dead ends: 495 [2020-09-21 10:20:34,560 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 [2020-09-21 10:20:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-09-21 10:20:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-09-21 10:20:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-09-21 10:20:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-09-21 10:20:34,584 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-09-21 10:20:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:34,585 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-09-21 10:20:34,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-09-21 10:20:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:20:34,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:34,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:34,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:34,587 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-09-21 10:20:34,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:34,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545832915] [2020-09-21 10:20:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:20:34,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545832915] [2020-09-21 10:20:34,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:34,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:34,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427049100] [2020-09-21 10:20:34,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:34,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:34,652 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-09-21 10:20:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:34,885 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-09-21 10:20:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:34,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-09-21 10:20:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:34,889 INFO L225 Difference]: With dead ends: 993 [2020-09-21 10:20:34,889 INFO L226 Difference]: Without dead ends: 529 [2020-09-21 10:20:34,891 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 [2020-09-21 10:20:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-09-21 10:20:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-09-21 10:20:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-09-21 10:20:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-09-21 10:20:34,923 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-09-21 10:20:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:34,923 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-09-21 10:20:34,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-09-21 10:20:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 10:20:34,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:34,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:34,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:34,926 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:34,927 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-09-21 10:20:34,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:34,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106484257] [2020-09-21 10:20:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:20:35,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106484257] [2020-09-21 10:20:35,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:35,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078498777] [2020-09-21 10:20:35,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:35,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:35,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:35,013 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-09-21 10:20:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,259 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-09-21 10:20:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:35,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-09-21 10:20:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,263 INFO L225 Difference]: With dead ends: 1027 [2020-09-21 10:20:35,263 INFO L226 Difference]: Without dead ends: 529 [2020-09-21 10:20:35,264 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 [2020-09-21 10:20:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-09-21 10:20:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-09-21 10:20:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-09-21 10:20:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-09-21 10:20:35,290 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-09-21 10:20:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,291 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-09-21 10:20:35,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-09-21 10:20:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 10:20:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:35,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:35,293 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-09-21 10:20:35,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270853239] [2020-09-21 10:20:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:20:35,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270853239] [2020-09-21 10:20:35,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:35,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005954051] [2020-09-21 10:20:35,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:35,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:35,355 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-09-21 10:20:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,631 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-09-21 10:20:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:35,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-09-21 10:20:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,635 INFO L225 Difference]: With dead ends: 1074 [2020-09-21 10:20:35,635 INFO L226 Difference]: Without dead ends: 576 [2020-09-21 10:20:35,637 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 [2020-09-21 10:20:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-09-21 10:20:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-09-21 10:20:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-09-21 10:20:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-09-21 10:20:35,662 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-09-21 10:20:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,663 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-09-21 10:20:35,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-09-21 10:20:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-21 10:20:35,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:35,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:35,665 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-09-21 10:20:35,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330193300] [2020-09-21 10:20:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:35,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330193300] [2020-09-21 10:20:35,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:35,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465272857] [2020-09-21 10:20:35,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:35,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:35,735 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-09-21 10:20:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,012 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-09-21 10:20:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:36,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-09-21 10:20:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,017 INFO L225 Difference]: With dead ends: 1184 [2020-09-21 10:20:36,018 INFO L226 Difference]: Without dead ends: 623 [2020-09-21 10:20:36,020 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 [2020-09-21 10:20:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-09-21 10:20:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-09-21 10:20:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-09-21 10:20:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-09-21 10:20:36,049 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-09-21 10:20:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,050 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-09-21 10:20:36,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-09-21 10:20:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-21 10:20:36,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:36,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:36,053 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,053 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-09-21 10:20:36,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682859867] [2020-09-21 10:20:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682859867] [2020-09-21 10:20:36,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:36,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541559018] [2020-09-21 10:20:36,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:36,140 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-09-21 10:20:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,392 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-09-21 10:20:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:36,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-09-21 10:20:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,396 INFO L225 Difference]: With dead ends: 1227 [2020-09-21 10:20:36,396 INFO L226 Difference]: Without dead ends: 623 [2020-09-21 10:20:36,399 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 [2020-09-21 10:20:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-09-21 10:20:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-09-21 10:20:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-09-21 10:20:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-09-21 10:20:36,427 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-09-21 10:20:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,427 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-09-21 10:20:36,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-09-21 10:20:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-21 10:20:36,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:36,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:20:36,430 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-09-21 10:20:36,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341415134] [2020-09-21 10:20:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:20:36,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341415134] [2020-09-21 10:20:36,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:36,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293902559] [2020-09-21 10:20:36,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:36,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:36,538 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-09-21 10:20:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,777 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-09-21 10:20:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:36,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-09-21 10:20:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,781 INFO L225 Difference]: With dead ends: 1223 [2020-09-21 10:20:36,781 INFO L226 Difference]: Without dead ends: 619 [2020-09-21 10:20:36,783 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 [2020-09-21 10:20:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-09-21 10:20:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-09-21 10:20:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-09-21 10:20:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-09-21 10:20:36,814 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-09-21 10:20:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,814 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-09-21 10:20:36,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-09-21 10:20:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 10:20:36,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-09-21 10:20:36,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:20:36,816 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-09-21 10:20:36,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017789246] [2020-09-21 10:20:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-09-21 10:20:36,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017789246] [2020-09-21 10:20:36,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:36,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829867177] [2020-09-21 10:20:36,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:36,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:36,894 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-09-21 10:20:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,166 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-09-21 10:20:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:37,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-09-21 10:20:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,170 INFO L225 Difference]: With dead ends: 1281 [2020-09-21 10:20:37,170 INFO L226 Difference]: Without dead ends: 677 [2020-09-21 10:20:37,172 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 [2020-09-21 10:20:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-09-21 10:20:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-09-21 10:20:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-09-21 10:20:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-09-21 10:20:37,204 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-09-21 10:20:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,204 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-09-21 10:20:37,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-09-21 10:20:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-21 10:20:37,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-09-21 10:20:37,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:20:37,207 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,207 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-09-21 10:20:37,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024754652] [2020-09-21 10:20:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-09-21 10:20:37,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024754652] [2020-09-21 10:20:37,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:37,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647515736] [2020-09-21 10:20:37,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:37,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:37,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:37,279 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-09-21 10:20:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,509 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-09-21 10:20:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:37,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-09-21 10:20:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,514 INFO L225 Difference]: With dead ends: 1313 [2020-09-21 10:20:37,514 INFO L226 Difference]: Without dead ends: 677 [2020-09-21 10:20:37,516 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 [2020-09-21 10:20:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-09-21 10:20:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-09-21 10:20:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-09-21 10:20:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-09-21 10:20:37,548 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-09-21 10:20:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,548 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-09-21 10:20:37,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-09-21 10:20:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-21 10:20:37,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:37,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:20:37,551 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-09-21 10:20:37,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794542826] [2020-09-21 10:20:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:20:37,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794542826] [2020-09-21 10:20:37,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:37,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115305639] [2020-09-21 10:20:37,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:37,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:37,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:37,617 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-09-21 10:20:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,913 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-09-21 10:20:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:37,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-09-21 10:20:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,919 INFO L225 Difference]: With dead ends: 1349 [2020-09-21 10:20:37,919 INFO L226 Difference]: Without dead ends: 713 [2020-09-21 10:20:37,920 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 [2020-09-21 10:20:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-09-21 10:20:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-09-21 10:20:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-09-21 10:20:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-09-21 10:20:37,963 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-09-21 10:20:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,964 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-09-21 10:20:37,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-09-21 10:20:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-21 10:20:37,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,968 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:37,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:20:37,969 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-09-21 10:20:37,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484072039] [2020-09-21 10:20:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:20:38,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484072039] [2020-09-21 10:20:38,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:38,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356067070] [2020-09-21 10:20:38,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:38,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:38,088 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-09-21 10:20:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,439 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-09-21 10:20:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:38,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-09-21 10:20:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,443 INFO L225 Difference]: With dead ends: 1406 [2020-09-21 10:20:38,443 INFO L226 Difference]: Without dead ends: 714 [2020-09-21 10:20:38,445 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 [2020-09-21 10:20:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-09-21 10:20:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-09-21 10:20:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-09-21 10:20:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-09-21 10:20:38,494 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-09-21 10:20:38,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,495 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-09-21 10:20:38,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:38,495 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-09-21 10:20:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-21 10:20:38,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 10:20:38,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:20:38,499 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-09-21 10:20:38,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121328327] [2020-09-21 10:20:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-21 10:20:38,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121328327] [2020-09-21 10:20:38,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:38,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237431182] [2020-09-21 10:20:38,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:38,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:38,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:38,573 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-09-21 10:20:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,821 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-09-21 10:20:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:38,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-09-21 10:20:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,825 INFO L225 Difference]: With dead ends: 1438 [2020-09-21 10:20:38,826 INFO L226 Difference]: Without dead ends: 749 [2020-09-21 10:20:38,827 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 [2020-09-21 10:20:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-09-21 10:20:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-09-21 10:20:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-09-21 10:20:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-09-21 10:20:38,864 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-09-21 10:20:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,865 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-09-21 10:20:38,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-09-21 10:20:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-21 10:20:38,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,867 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 10:20:38,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:20:38,867 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-09-21 10:20:38,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714500654] [2020-09-21 10:20:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-21 10:20:38,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714500654] [2020-09-21 10:20:38,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:38,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070849001] [2020-09-21 10:20:38,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:38,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:38,971 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-09-21 10:20:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,337 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-09-21 10:20:39,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:39,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-09-21 10:20:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,343 INFO L225 Difference]: With dead ends: 1479 [2020-09-21 10:20:39,344 INFO L226 Difference]: Without dead ends: 749 [2020-09-21 10:20:39,346 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 [2020-09-21 10:20:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-09-21 10:20:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-09-21 10:20:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-09-21 10:20:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-09-21 10:20:39,436 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-09-21 10:20:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,436 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-09-21 10:20:39,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-09-21 10:20:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-21 10:20:39,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,438 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:39,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:20:39,439 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-09-21 10:20:39,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539066233] [2020-09-21 10:20:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-09-21 10:20:39,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539066233] [2020-09-21 10:20:39,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:39,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289446515] [2020-09-21 10:20:39,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:39,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:39,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:39,535 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-09-21 10:20:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,861 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-09-21 10:20:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:39,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-09-21 10:20:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,867 INFO L225 Difference]: With dead ends: 1515 [2020-09-21 10:20:39,867 INFO L226 Difference]: Without dead ends: 785 [2020-09-21 10:20:39,872 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 [2020-09-21 10:20:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-09-21 10:20:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-09-21 10:20:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-09-21 10:20:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-09-21 10:20:39,931 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-09-21 10:20:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,932 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-09-21 10:20:39,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-09-21 10:20:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-21 10:20:39,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:39,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:20:39,939 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-09-21 10:20:39,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077485521] [2020-09-21 10:20:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-09-21 10:20:40,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077485521] [2020-09-21 10:20:40,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:40,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089278996] [2020-09-21 10:20:40,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:40,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:40,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:40,092 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-09-21 10:20:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,427 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-09-21 10:20:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:40,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-09-21 10:20:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,433 INFO L225 Difference]: With dead ends: 1547 [2020-09-21 10:20:40,433 INFO L226 Difference]: Without dead ends: 785 [2020-09-21 10:20:40,440 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 [2020-09-21 10:20:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-09-21 10:20:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-09-21 10:20:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-09-21 10:20:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-09-21 10:20:40,509 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-09-21 10:20:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,510 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-09-21 10:20:40,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-09-21 10:20:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-21 10:20:40,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,515 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:40,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:20:40,515 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-09-21 10:20:40,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361357976] [2020-09-21 10:20:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-09-21 10:20:40,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361357976] [2020-09-21 10:20:40,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:40,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856440499] [2020-09-21 10:20:40,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:40,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:40,639 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-09-21 10:20:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,892 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-09-21 10:20:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:40,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-09-21 10:20:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,897 INFO L225 Difference]: With dead ends: 1573 [2020-09-21 10:20:40,897 INFO L226 Difference]: Without dead ends: 811 [2020-09-21 10:20:40,899 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 [2020-09-21 10:20:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-09-21 10:20:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-09-21 10:20:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-09-21 10:20:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-09-21 10:20:40,941 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-09-21 10:20:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,941 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-09-21 10:20:40,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-09-21 10:20:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-21 10:20:40,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,944 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:40,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:20:40,945 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-09-21 10:20:40,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516582931] [2020-09-21 10:20:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-09-21 10:20:41,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516582931] [2020-09-21 10:20:41,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:41,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720344437] [2020-09-21 10:20:41,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:41,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:41,031 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-09-21 10:20:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,282 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-09-21 10:20:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:41,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-09-21 10:20:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,287 INFO L225 Difference]: With dead ends: 1601 [2020-09-21 10:20:41,287 INFO L226 Difference]: Without dead ends: 811 [2020-09-21 10:20:41,289 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 [2020-09-21 10:20:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-09-21 10:20:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-09-21 10:20:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-09-21 10:20:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-09-21 10:20:41,336 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-09-21 10:20:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,336 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-09-21 10:20:41,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-09-21 10:20:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-21 10:20:41,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:20:41,340 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-09-21 10:20:41,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561392790] [2020-09-21 10:20:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-21 10:20:41,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561392790] [2020-09-21 10:20:41,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:41,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294975195] [2020-09-21 10:20:41,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:41,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:41,446 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-09-21 10:20:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,789 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-09-21 10:20:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:41,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-09-21 10:20:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,794 INFO L225 Difference]: With dead ends: 1656 [2020-09-21 10:20:41,795 INFO L226 Difference]: Without dead ends: 866 [2020-09-21 10:20:41,797 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 [2020-09-21 10:20:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-09-21 10:20:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-09-21 10:20:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-09-21 10:20:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-09-21 10:20:41,866 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-09-21 10:20:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,867 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-09-21 10:20:41,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-09-21 10:20:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-21 10:20:41,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,870 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 10:20:41,870 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-09-21 10:20:41,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619694394] [2020-09-21 10:20:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-21 10:20:41,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619694394] [2020-09-21 10:20:41,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:41,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806233172] [2020-09-21 10:20:41,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:41,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:41,969 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-09-21 10:20:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,278 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-09-21 10:20:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:42,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-09-21 10:20:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,284 INFO L225 Difference]: With dead ends: 1705 [2020-09-21 10:20:42,284 INFO L226 Difference]: Without dead ends: 850 [2020-09-21 10:20:42,286 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 [2020-09-21 10:20:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-09-21 10:20:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-09-21 10:20:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-09-21 10:20:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-09-21 10:20:42,333 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-09-21 10:20:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,333 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-09-21 10:20:42,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-09-21 10:20:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-21 10:20:42,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-09-21 10:20:42,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 10:20:42,337 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-09-21 10:20:42,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291665813] [2020-09-21 10:20:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-21 10:20:42,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291665813] [2020-09-21 10:20:42,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:42,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604543038] [2020-09-21 10:20:42,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:42,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:42,459 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-09-21 10:20:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,816 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-09-21 10:20:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:42,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-09-21 10:20:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,821 INFO L225 Difference]: With dead ends: 1671 [2020-09-21 10:20:42,822 INFO L226 Difference]: Without dead ends: 848 [2020-09-21 10:20:42,826 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 [2020-09-21 10:20:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-09-21 10:20:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-09-21 10:20:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-09-21 10:20:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-09-21 10:20:42,898 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-09-21 10:20:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,898 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-09-21 10:20:42,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-09-21 10:20:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-21 10:20:42,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,903 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1] [2020-09-21 10:20:42,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 10:20:42,903 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-09-21 10:20:42,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083137497] [2020-09-21 10:20:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-21 10:20:43,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083137497] [2020-09-21 10:20:43,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:43,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672114357] [2020-09-21 10:20:43,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:43,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:43,024 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-09-21 10:20:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,328 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-09-21 10:20:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:43,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-21 10:20:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,333 INFO L225 Difference]: With dead ends: 1671 [2020-09-21 10:20:43,333 INFO L226 Difference]: Without dead ends: 831 [2020-09-21 10:20:43,338 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 [2020-09-21 10:20:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-09-21 10:20:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-09-21 10:20:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-09-21 10:20:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-09-21 10:20:43,388 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-09-21 10:20:43,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,389 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-09-21 10:20:43,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-09-21 10:20:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-21 10:20:43,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,391 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 10:20:43,392 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-09-21 10:20:43,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116882110] [2020-09-21 10:20:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-09-21 10:20:43,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116882110] [2020-09-21 10:20:43,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570790120] [2020-09-21 10:20:43,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,491 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-09-21 10:20:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,581 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-09-21 10:20:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-09-21 10:20:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,590 INFO L225 Difference]: With dead ends: 2417 [2020-09-21 10:20:43,590 INFO L226 Difference]: Without dead ends: 1611 [2020-09-21 10:20:43,592 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 [2020-09-21 10:20:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-09-21 10:20:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-09-21 10:20:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-09-21 10:20:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-09-21 10:20:43,650 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-09-21 10:20:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,651 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-09-21 10:20:43,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-09-21 10:20:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-21 10:20:43,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,653 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 10:20:43,654 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-09-21 10:20:43,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309729750] [2020-09-21 10:20:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-09-21 10:20:43,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309729750] [2020-09-21 10:20:43,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623978693] [2020-09-21 10:20:43,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,765 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-09-21 10:20:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,892 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-09-21 10:20:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-09-21 10:20:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,901 INFO L225 Difference]: With dead ends: 2416 [2020-09-21 10:20:43,901 INFO L226 Difference]: Without dead ends: 1608 [2020-09-21 10:20:43,905 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 [2020-09-21 10:20:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-09-21 10:20:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-09-21 10:20:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-09-21 10:20:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-09-21 10:20:44,020 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-09-21 10:20:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,020 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-09-21 10:20:44,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-09-21 10:20:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-21 10:20:44,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,024 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:44,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 10:20:44,024 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-09-21 10:20:44,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839614837] [2020-09-21 10:20:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-09-21 10:20:44,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839614837] [2020-09-21 10:20:44,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254149270] [2020-09-21 10:20:44,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,208 INFO L87 Difference]: Start difference. First operand 1606 states and 2297 transitions. Second operand 3 states. [2020-09-21 10:20:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,534 INFO L93 Difference]: Finished difference Result 4752 states and 6785 transitions. [2020-09-21 10:20:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-09-21 10:20:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,549 INFO L225 Difference]: With dead ends: 4752 [2020-09-21 10:20:44,549 INFO L226 Difference]: Without dead ends: 3159 [2020-09-21 10:20:44,553 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 [2020-09-21 10:20:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-09-21 10:20:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1606. [2020-09-21 10:20:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-09-21 10:20:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2293 transitions. [2020-09-21 10:20:44,684 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2293 transitions. Word has length 161 [2020-09-21 10:20:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,685 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2293 transitions. [2020-09-21 10:20:44,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2293 transitions. [2020-09-21 10:20:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-21 10:20:44,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,688 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:44,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 10:20:44,688 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash -179508653, now seen corresponding path program 1 times [2020-09-21 10:20:44,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570411247] [2020-09-21 10:20:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-21 10:20:44,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570411247] [2020-09-21 10:20:44,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880459526] [2020-09-21 10:20:44,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,777 INFO L87 Difference]: Start difference. First operand 1606 states and 2293 transitions. Second operand 3 states. [2020-09-21 10:20:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,164 INFO L93 Difference]: Finished difference Result 4792 states and 6845 transitions. [2020-09-21 10:20:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-09-21 10:20:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,185 INFO L225 Difference]: With dead ends: 4792 [2020-09-21 10:20:45,185 INFO L226 Difference]: Without dead ends: 3199 [2020-09-21 10:20:45,188 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 [2020-09-21 10:20:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2020-09-21 10:20:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3197. [2020-09-21 10:20:45,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-09-21 10:20:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4493 transitions. [2020-09-21 10:20:45,418 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4493 transitions. Word has length 162 [2020-09-21 10:20:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,419 INFO L479 AbstractCegarLoop]: Abstraction has 3197 states and 4493 transitions. [2020-09-21 10:20:45,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4493 transitions. [2020-09-21 10:20:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-21 10:20:45,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,426 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:45,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 10:20:45,426 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,435 INFO L82 PathProgramCache]: Analyzing trace with hash 774431505, now seen corresponding path program 1 times [2020-09-21 10:20:45,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521504482] [2020-09-21 10:20:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:20:45,532 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:20:45,533 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:20:45,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 10:20:45,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:45 BoogieIcfgContainer [2020-09-21 10:20:45,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:45,587 INFO L168 Benchmark]: Toolchain (without parser) took 17401.10 ms. Allocated memory was 136.8 MB in the beginning and 554.2 MB in the end (delta: 417.3 MB). Free memory was 99.3 MB in the beginning and 507.1 MB in the end (delta: -407.8 MB). Peak memory consumption was 390.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:45,587 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:45,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 676.33 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 98.7 MB in the beginning and 174.5 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:45,593 INFO L168 Benchmark]: Boogie Preprocessor took 72.32 ms. Allocated memory is still 200.3 MB. Free memory was 174.5 MB in the beginning and 171.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:45,593 INFO L168 Benchmark]: RCFGBuilder took 1096.27 ms. Allocated memory is still 200.3 MB. Free memory was 171.6 MB in the beginning and 113.6 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:45,594 INFO L168 Benchmark]: TraceAbstraction took 15544.88 ms. Allocated memory was 200.3 MB in the beginning and 554.2 MB in the end (delta: 353.9 MB). Free memory was 112.9 MB in the beginning and 507.1 MB in the end (delta: -394.1 MB). Peak memory consumption was 340.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:45,596 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 676.33 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 98.7 MB in the beginning and 174.5 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.32 ms. Allocated memory is still 200.3 MB. Free memory was 174.5 MB in the beginning and 171.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1096.27 ms. Allocated memory is still 200.3 MB. Free memory was 171.6 MB in the beginning and 113.6 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15544.88 ms. Allocated memory was 200.3 MB in the beginning and 554.2 MB in the end (delta: 353.9 MB). Free memory was 112.9 MB in the beginning and 507.1 MB in the end (delta: -394.1 MB). Peak memory consumption was 340.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L702] int s ; [L703] int tmp ; [L707] s = 8464 [L708] CALL ssl3_accept(s) [L12] int s__info_callback = __VERIFIER_nondet_int() ; [L13] int s__in_handshake = __VERIFIER_nondet_int() ; [L14] int s__state ; [L15] int s__new_session ; [L16] int s__server ; [L17] int s__version = __VERIFIER_nondet_int() ; [L18] int s__type ; [L19] int s__init_num ; [L20] int s__hit = __VERIFIER_nondet_int() ; [L21] int s__rwstate ; [L22] int s__init_buf___0 = 1; [L23] int s__debug = __VERIFIER_nondet_int() ; [L24] int s__shutdown ; [L25] int s__cert = __VERIFIER_nondet_int() ; [L26] int s__options = __VERIFIER_nondet_int() ; [L27] int s__verify_mode = __VERIFIER_nondet_int() ; [L28] int s__session__peer = __VERIFIER_nondet_int() ; [L29] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L30] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L34] int s__s3__tmp__cert_request ; [L35] int s__s3__tmp__reuse_message ; [L36] int s__s3__tmp__use_rsa_tmp ; [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__new_cipher__algorithms ; [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_cipher__algo_strength ; [L41] int s__session__cipher ; [L42] int buf ; [L43] unsigned long l ; [L44] unsigned long Time ; [L45] unsigned long tmp ; [L46] int cb ; [L47] long num1 = __VERIFIER_nondet_long() ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int got_new_session ; [L53] int tmp___1 = __VERIFIER_nondet_int() ; [L54] int tmp___2 = __VERIFIER_nondet_int() ; [L55] int tmp___3 = __VERIFIER_nondet_int() ; [L56] int tmp___4 = __VERIFIER_nondet_int() ; [L57] int tmp___5 = __VERIFIER_nondet_int() ; [L58] int tmp___6 = __VERIFIER_nondet_int() ; [L59] int tmp___7 ; [L60] long tmp___8 = __VERIFIER_nondet_long() ; [L61] int tmp___9 = __VERIFIER_nondet_int() ; [L62] int tmp___10 = __VERIFIER_nondet_int() ; [L63] int blastFlag ; [L64] int __cil_tmp55 ; [L65] unsigned long __cil_tmp56 ; [L66] unsigned long __cil_tmp57 ; [L67] unsigned long __cil_tmp58 ; [L68] unsigned long __cil_tmp59 ; [L69] int __cil_tmp60 ; [L70] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L74] s__state = initial_state [L75] blastFlag = 0 [L76] tmp = __VERIFIER_nondet_int() [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L272] s__shutdown = 0 [L273] ret = __VERIFIER_nondet_int() [L274] COND TRUE blastFlag == 0 [L275] blastFlag = 1 [L277] COND FALSE !(ret <= 0) [L280] got_new_session = 1 [L281] s__state = 8496 [L282] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L290] COND FALSE !(ret <= 0) [L293] COND FALSE !(\read(s__hit)) [L296] s__state = 8512 [L298] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND TRUE s__state == 8512 [L303] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L304] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L305] COND TRUE __cil_tmp56 + 256UL [L306] __cil_tmp56 = 256345 [L307] skip = 1 [L318] s__state = 8528 [L319] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND TRUE s__state == 8528 [L323] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L324] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L326] __cil_tmp57 = (unsigned long )s__options [L327] COND TRUE __cil_tmp57 + 2097152UL [L328] s__s3__tmp__use_rsa_tmp = 1 [L333] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L361] ret = __VERIFIER_nondet_int() [L362] COND FALSE !(blastFlag == 3) [L365] COND FALSE !(ret <= 0) [L382] s__state = 8544 [L383] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND TRUE s__state == 8544 [L387] COND TRUE s__verify_mode + 1 [L388] COND TRUE s__session__peer != 0 [L389] COND TRUE s__verify_mode + 4 [L390] s__verify_mode = 123 [L391] skip = 1 [L392] s__s3__tmp__cert_request = 0 [L393] s__state = 8560 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND TRUE s__state == 8560 [L437] ret = __VERIFIER_nondet_int() [L438] COND FALSE !(ret <= 0) [L441] s__s3__tmp__next_state___0 = 8576 [L442] s__state = 8448 [L443] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND TRUE ! s__s3__tmp__reuse_message [L653] COND TRUE ! skip [L654] COND TRUE state == 8560 [L655] COND TRUE s__state == 8448 [L656] COND TRUE s__verify_mode != -1 [L657] COND TRUE s__verify_mode != -2 [L658] COND TRUE __cil_tmp61 != 9021 [L659] COND TRUE __cil_tmp58 != 4294967294 [L660] COND TRUE blastFlag != 4 [L661] COND TRUE tmp___7 != 1024 [L697] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 175 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.4s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7259 SDtfs, 16112 SDslu, 7753 SDs, 0 SdLazy, 4949 SolverSat, 1408 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3197occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 3391 NumberOfCodeBlocks, 3391 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3195 ConstructedInterpolants, 0 QuantifiedInterpolants, 632376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 2752/2752 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...