/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -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 0.1.25-5644d1e-m [2020-08-18 17:05:12,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:05:12,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:05:12,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:05:12,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:05:12,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:05:12,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:05:12,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:05:12,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:05:12,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:05:12,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:05:12,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:05:12,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:05:12,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:05:12,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:05:12,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:05:12,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:05:12,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:05:12,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:05:12,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:05:12,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:05:12,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:05:12,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:05:12,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:05:12,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:05:12,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:05:12,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:05:12,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:05:12,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:05:12,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:05:12,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:05:12,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:05:12,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:05:12,998 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:05:12,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:05:12,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:05:12,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:05:12,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:05:12,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:05:13,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:05:13,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:05:13,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:05:13,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:05:13,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:05:13,000 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:05:13,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:05:13,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:05:13,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:05:13,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:05:13,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:05:13,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:05:13,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:05:13,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:05:13,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:05:13,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:05:13,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:05:13,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:05:13,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:05:13,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:05:13,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:05:13,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:05:13,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:05:13,340 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:05:13,340 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:05:13,342 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 17:05:13,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/450b3faaa/6a4c5314a42d4827b3a0eec9b075a917/FLAG53362ee3c [2020-08-18 17:05:13,931 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:05:13,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 17:05:13,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/450b3faaa/6a4c5314a42d4827b3a0eec9b075a917/FLAG53362ee3c [2020-08-18 17:05:14,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/450b3faaa/6a4c5314a42d4827b3a0eec9b075a917 [2020-08-18 17:05:14,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:05:14,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:05:14,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:14,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:05:14,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:05:14,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231fe863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14, skipping insertion in model container [2020-08-18 17:05:14,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:05:14,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:05:14,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:14,611 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:05:14,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:14,800 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:05:14,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14 WrapperNode [2020-08-18 17:05:14,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:14,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:05:14,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:05:14,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:05:14,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... [2020-08-18 17:05:14,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:05:14,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:05:14,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:05:14,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:05:14,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:05:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:05:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:05:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 17:05:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:05:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:05:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 17:05:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:05:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 17:05:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 17:05:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 17:05:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:05:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:05:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:05:15,144 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 17:05:15,718 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 17:05:15,718 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 17:05:15,730 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:05:15,730 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:05:15,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:15 BoogieIcfgContainer [2020-08-18 17:05:15,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:05:15,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:05:15,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:05:15,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:05:15,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:05:14" (1/3) ... [2020-08-18 17:05:15,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483ccfc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:15, skipping insertion in model container [2020-08-18 17:05:15,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:14" (2/3) ... [2020-08-18 17:05:15,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483ccfc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:15, skipping insertion in model container [2020-08-18 17:05:15,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:15" (3/3) ... [2020-08-18 17:05:15,746 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-08-18 17:05:15,757 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:05:15,766 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:05:15,782 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:05:15,812 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:05:15,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:05:15,813 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:05:15,813 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:05:15,813 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:05:15,813 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:05:15,814 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:05:15,814 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:05:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-18 17:05:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 17:05:15,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:15,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:15,852 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:15,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-08-18 17:05:15,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:15,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869535964] [2020-08-18 17:05:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:16,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:16,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869535964] [2020-08-18 17:05:16,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:16,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:16,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369407324] [2020-08-18 17:05:16,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:16,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:16,244 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-08-18 17:05:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:16,585 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-08-18 17:05:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:16,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 17:05:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:16,601 INFO L225 Difference]: With dead ends: 362 [2020-08-18 17:05:16,601 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 17:05:16,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 17:05:16,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-08-18 17:05:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 17:05:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-08-18 17:05:16,668 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-08-18 17:05:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:16,668 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-08-18 17:05:16,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-08-18 17:05:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:05:16,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:16,671 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] [2020-08-18 17:05:16,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:05:16,672 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-08-18 17:05:16,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:16,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807491826] [2020-08-18 17:05:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:16,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:16,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807491826] [2020-08-18 17:05:16,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:16,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:16,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366347789] [2020-08-18 17:05:16,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:16,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:16,773 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-08-18 17:05:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:17,011 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-08-18 17:05:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:17,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 17:05:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:17,014 INFO L225 Difference]: With dead ends: 363 [2020-08-18 17:05:17,014 INFO L226 Difference]: Without dead ends: 199 [2020-08-18 17:05:17,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-18 17:05:17,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-08-18 17:05:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-18 17:05:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-08-18 17:05:17,035 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-08-18 17:05:17,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:17,035 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-08-18 17:05:17,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-08-18 17:05:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:05:17,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:17,037 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] [2020-08-18 17:05:17,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:05:17,038 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-08-18 17:05:17,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:17,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309812355] [2020-08-18 17:05:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:17,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309812355] [2020-08-18 17:05:17,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:17,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:17,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72162050] [2020-08-18 17:05:17,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:17,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:17,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:17,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:17,133 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-08-18 17:05:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:17,382 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-08-18 17:05:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:17,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 17:05:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:17,385 INFO L225 Difference]: With dead ends: 393 [2020-08-18 17:05:17,385 INFO L226 Difference]: Without dead ends: 207 [2020-08-18 17:05:17,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-18 17:05:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-08-18 17:05:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-18 17:05:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-08-18 17:05:17,408 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-08-18 17:05:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:17,440 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-08-18 17:05:17,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-08-18 17:05:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:05:17,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:17,442 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] [2020-08-18 17:05:17,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:05:17,443 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:17,443 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-08-18 17:05:17,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:17,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581817590] [2020-08-18 17:05:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:17,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581817590] [2020-08-18 17:05:17,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:17,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:17,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017790677] [2020-08-18 17:05:17,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:17,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:17,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:17,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:17,530 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-08-18 17:05:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:17,773 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-08-18 17:05:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:17,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 17:05:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:17,779 INFO L225 Difference]: With dead ends: 398 [2020-08-18 17:05:17,780 INFO L226 Difference]: Without dead ends: 206 [2020-08-18 17:05:17,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-18 17:05:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-18 17:05:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:05:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-08-18 17:05:17,806 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-08-18 17:05:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:17,806 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-08-18 17:05:17,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-08-18 17:05:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 17:05:17,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:17,809 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] [2020-08-18 17:05:17,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:05:17,810 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:17,811 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-08-18 17:05:17,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:17,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296759303] [2020-08-18 17:05:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:17,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296759303] [2020-08-18 17:05:17,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:17,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:17,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249697174] [2020-08-18 17:05:17,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:17,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:17,916 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-08-18 17:05:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,140 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-08-18 17:05:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:18,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-18 17:05:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,142 INFO L225 Difference]: With dead ends: 409 [2020-08-18 17:05:18,142 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 17:05:18,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 17:05:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 17:05:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:05:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-08-18 17:05:18,155 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-08-18 17:05:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,155 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-08-18 17:05:18,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-08-18 17:05:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 17:05:18,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,158 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] [2020-08-18 17:05:18,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:05:18,158 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-08-18 17:05:18,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159109629] [2020-08-18 17:05:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159109629] [2020-08-18 17:05:18,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:18,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183115511] [2020-08-18 17:05:18,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:18,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:18,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:18,212 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-08-18 17:05:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,428 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-08-18 17:05:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:18,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-08-18 17:05:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,430 INFO L225 Difference]: With dead ends: 409 [2020-08-18 17:05:18,430 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 17:05:18,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 17:05:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 17:05:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:05:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-08-18 17:05:18,442 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-08-18 17:05:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,443 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-08-18 17:05:18,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-08-18 17:05:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:05:18,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,444 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] [2020-08-18 17:05:18,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:05:18,445 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-08-18 17:05:18,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285997880] [2020-08-18 17:05:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285997880] [2020-08-18 17:05:18,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:18,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883989949] [2020-08-18 17:05:18,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:18,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:18,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:18,496 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-08-18 17:05:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,707 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-08-18 17:05:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:18,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-08-18 17:05:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,709 INFO L225 Difference]: With dead ends: 409 [2020-08-18 17:05:18,710 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 17:05:18,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 17:05:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 17:05:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:05:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-08-18 17:05:18,723 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-08-18 17:05:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,723 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-08-18 17:05:18,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-08-18 17:05:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:05:18,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,726 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] [2020-08-18 17:05:18,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:05:18,727 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-08-18 17:05:18,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386586389] [2020-08-18 17:05:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386586389] [2020-08-18 17:05:18,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:05:18,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277190294] [2020-08-18 17:05:18,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:05:18,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:05:18,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:18,833 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-08-18 17:05:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,185 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-08-18 17:05:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:05:19,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-08-18 17:05:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,190 INFO L225 Difference]: With dead ends: 605 [2020-08-18 17:05:19,190 INFO L226 Difference]: Without dead ends: 412 [2020-08-18 17:05:19,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:05:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-08-18 17:05:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-08-18 17:05:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-18 17:05:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-08-18 17:05:19,237 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-08-18 17:05:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,237 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-08-18 17:05:19,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:05:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-08-18 17:05:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 17:05:19,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,240 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] [2020-08-18 17:05:19,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:05:19,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-08-18 17:05:19,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502648068] [2020-08-18 17:05:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502648068] [2020-08-18 17:05:19,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:19,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329571340] [2020-08-18 17:05:19,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:19,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:19,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:19,316 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-08-18 17:05:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,620 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-08-18 17:05:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:19,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-08-18 17:05:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,631 INFO L225 Difference]: With dead ends: 847 [2020-08-18 17:05:19,631 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 17:05:19,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 17:05:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-08-18 17:05:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-08-18 17:05:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-08-18 17:05:19,674 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-08-18 17:05:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,674 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-08-18 17:05:19,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-08-18 17:05:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 17:05:19,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,680 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] [2020-08-18 17:05:19,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:05:19,681 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-08-18 17:05:19,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906303525] [2020-08-18 17:05:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906303525] [2020-08-18 17:05:19,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:19,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096476542] [2020-08-18 17:05:19,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:19,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:19,791 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-08-18 17:05:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,087 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-08-18 17:05:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:20,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-08-18 17:05:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,093 INFO L225 Difference]: With dead ends: 936 [2020-08-18 17:05:20,093 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 17:05:20,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 17:05:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-08-18 17:05:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-08-18 17:05:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-08-18 17:05:20,124 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-08-18 17:05:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,124 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-08-18 17:05:20,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-08-18 17:05:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:05:20,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,126 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] [2020-08-18 17:05:20,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:05:20,126 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-08-18 17:05:20,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028879545] [2020-08-18 17:05:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:05:20,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028879545] [2020-08-18 17:05:20,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:20,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955497526] [2020-08-18 17:05:20,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:20,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:20,194 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-08-18 17:05:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,501 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-08-18 17:05:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:20,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-18 17:05:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,508 INFO L225 Difference]: With dead ends: 993 [2020-08-18 17:05:20,508 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 17:05:20,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 17:05:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 17:05:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 17:05:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-08-18 17:05:20,548 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-08-18 17:05:20,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,549 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-08-18 17:05:20,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-08-18 17:05:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 17:05:20,551 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,552 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] [2020-08-18 17:05:20,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:05:20,552 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-08-18 17:05:20,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219372834] [2020-08-18 17:05:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:05:20,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219372834] [2020-08-18 17:05:20,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:20,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098678524] [2020-08-18 17:05:20,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:20,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:20,663 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-08-18 17:05:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,967 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-08-18 17:05:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:20,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 17:05:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,971 INFO L225 Difference]: With dead ends: 1027 [2020-08-18 17:05:20,972 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 17:05:20,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 17:05:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 17:05:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 17:05:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-08-18 17:05:21,000 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-08-18 17:05:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,000 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-08-18 17:05:21,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-08-18 17:05:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 17:05:21,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,002 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] [2020-08-18 17:05:21,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:05:21,003 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-08-18 17:05:21,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655607028] [2020-08-18 17:05:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:05:21,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655607028] [2020-08-18 17:05:21,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:21,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261475675] [2020-08-18 17:05:21,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:21,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:21,070 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-08-18 17:05:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:21,368 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-08-18 17:05:21,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:21,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 17:05:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:21,372 INFO L225 Difference]: With dead ends: 1074 [2020-08-18 17:05:21,372 INFO L226 Difference]: Without dead ends: 576 [2020-08-18 17:05:21,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-08-18 17:05:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-08-18 17:05:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-08-18 17:05:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-08-18 17:05:21,405 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-08-18 17:05:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,407 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-08-18 17:05:21,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-08-18 17:05:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 17:05:21,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,412 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] [2020-08-18 17:05:21,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:05:21,413 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-08-18 17:05:21,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76078958] [2020-08-18 17:05:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76078958] [2020-08-18 17:05:21,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:21,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702791222] [2020-08-18 17:05:21,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:21,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:21,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:21,519 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-08-18 17:05:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:21,815 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-08-18 17:05:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:21,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-08-18 17:05:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:21,819 INFO L225 Difference]: With dead ends: 1184 [2020-08-18 17:05:21,820 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 17:05:21,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 17:05:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 17:05:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 17:05:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-08-18 17:05:21,854 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-08-18 17:05:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,854 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-08-18 17:05:21,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-08-18 17:05:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 17:05:21,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,856 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] [2020-08-18 17:05:21,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:05:21,856 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-08-18 17:05:21,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107473055] [2020-08-18 17:05:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:21,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107473055] [2020-08-18 17:05:21,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:21,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514379772] [2020-08-18 17:05:21,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:21,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:21,919 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-08-18 17:05:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,205 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-08-18 17:05:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:22,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-18 17:05:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,209 INFO L225 Difference]: With dead ends: 1227 [2020-08-18 17:05:22,210 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 17:05:22,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 17:05:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 17:05:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 17:05:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-08-18 17:05:22,247 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-08-18 17:05:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:22,247 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-08-18 17:05:22,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-08-18 17:05:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-18 17:05:22,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:22,249 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] [2020-08-18 17:05:22,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:05:22,250 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-08-18 17:05:22,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:22,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897732967] [2020-08-18 17:05:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:05:22,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897732967] [2020-08-18 17:05:22,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:22,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:22,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614187351] [2020-08-18 17:05:22,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:22,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:22,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:22,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:22,334 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-08-18 17:05:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,594 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-08-18 17:05:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:22,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-08-18 17:05:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,598 INFO L225 Difference]: With dead ends: 1223 [2020-08-18 17:05:22,599 INFO L226 Difference]: Without dead ends: 619 [2020-08-18 17:05:22,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-08-18 17:05:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-08-18 17:05:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 17:05:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-08-18 17:05:22,632 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-08-18 17:05:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:22,632 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-08-18 17:05:22,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-08-18 17:05:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 17:05:22,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:22,634 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] [2020-08-18 17:05:22,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:05:22,635 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-08-18 17:05:22,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:22,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573770802] [2020-08-18 17:05:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 17:05:22,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573770802] [2020-08-18 17:05:22,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:22,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:22,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133693256] [2020-08-18 17:05:22,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:22,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:22,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:22,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:22,698 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-08-18 17:05:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,957 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-08-18 17:05:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:22,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-08-18 17:05:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,962 INFO L225 Difference]: With dead ends: 1281 [2020-08-18 17:05:22,963 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 17:05:22,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 17:05:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 17:05:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 17:05:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-08-18 17:05:23,004 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-08-18 17:05:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,004 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-08-18 17:05:23,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-08-18 17:05:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 17:05:23,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,007 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] [2020-08-18 17:05:23,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:05:23,008 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,008 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-08-18 17:05:23,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697627236] [2020-08-18 17:05:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 17:05:23,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697627236] [2020-08-18 17:05:23,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:23,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589049299] [2020-08-18 17:05:23,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:23,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:23,078 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-08-18 17:05:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,343 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-08-18 17:05:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:23,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-08-18 17:05:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,347 INFO L225 Difference]: With dead ends: 1313 [2020-08-18 17:05:23,347 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 17:05:23,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 17:05:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 17:05:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 17:05:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-08-18 17:05:23,380 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-08-18 17:05:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,381 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-08-18 17:05:23,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-08-18 17:05:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-18 17:05:23,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,383 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] [2020-08-18 17:05:23,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:05:23,383 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-08-18 17:05:23,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489390697] [2020-08-18 17:05:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:05:23,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489390697] [2020-08-18 17:05:23,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:23,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789178002] [2020-08-18 17:05:23,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:23,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:23,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:23,441 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-08-18 17:05:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,778 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-08-18 17:05:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:23,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-08-18 17:05:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,785 INFO L225 Difference]: With dead ends: 1349 [2020-08-18 17:05:23,785 INFO L226 Difference]: Without dead ends: 713 [2020-08-18 17:05:23,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-08-18 17:05:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-08-18 17:05:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-08-18 17:05:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-08-18 17:05:23,859 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-08-18 17:05:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,860 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-08-18 17:05:23,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-08-18 17:05:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 17:05:23,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,864 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] [2020-08-18 17:05:23,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:05:23,865 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-08-18 17:05:23,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718546830] [2020-08-18 17:05:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:05:23,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718546830] [2020-08-18 17:05:23,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:23,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192468026] [2020-08-18 17:05:23,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:23,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:23,960 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-08-18 17:05:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,337 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-08-18 17:05:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:24,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-08-18 17:05:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,342 INFO L225 Difference]: With dead ends: 1406 [2020-08-18 17:05:24,342 INFO L226 Difference]: Without dead ends: 714 [2020-08-18 17:05:24,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-18 17:05:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-08-18 17:05:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-18 17:05:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-08-18 17:05:24,416 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-08-18 17:05:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,417 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-08-18 17:05:24,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-08-18 17:05:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-18 17:05:24,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:24,421 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] [2020-08-18 17:05:24,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:05:24,422 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:24,423 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-08-18 17:05:24,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:24,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075588994] [2020-08-18 17:05:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 17:05:24,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075588994] [2020-08-18 17:05:24,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:24,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:24,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670346847] [2020-08-18 17:05:24,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:24,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:24,573 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-08-18 17:05:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,920 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-08-18 17:05:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:24,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-08-18 17:05:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,927 INFO L225 Difference]: With dead ends: 1438 [2020-08-18 17:05:24,927 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 17:05:24,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 17:05:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 17:05:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 17:05:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-08-18 17:05:24,994 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-08-18 17:05:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,995 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-08-18 17:05:24,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-08-18 17:05:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 17:05:24,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:24,998 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] [2020-08-18 17:05:24,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:05:24,998 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-08-18 17:05:24,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:24,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877051404] [2020-08-18 17:05:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 17:05:25,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877051404] [2020-08-18 17:05:25,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:25,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:25,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321995905] [2020-08-18 17:05:25,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:25,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:25,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:25,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:25,104 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-08-18 17:05:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:25,360 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-08-18 17:05:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:25,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-08-18 17:05:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:25,368 INFO L225 Difference]: With dead ends: 1479 [2020-08-18 17:05:25,368 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 17:05:25,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 17:05:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 17:05:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 17:05:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-08-18 17:05:25,418 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-08-18 17:05:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:25,418 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-08-18 17:05:25,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-08-18 17:05:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-18 17:05:25,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:25,424 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] [2020-08-18 17:05:25,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:05:25,424 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-08-18 17:05:25,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:25,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207864362] [2020-08-18 17:05:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 17:05:25,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207864362] [2020-08-18 17:05:25,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:25,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:25,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560267860] [2020-08-18 17:05:25,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:25,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:25,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:25,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:25,496 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-08-18 17:05:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:25,755 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-08-18 17:05:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:25,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-08-18 17:05:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:25,759 INFO L225 Difference]: With dead ends: 1515 [2020-08-18 17:05:25,760 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 17:05:25,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 17:05:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 17:05:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 17:05:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-08-18 17:05:25,801 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-08-18 17:05:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:25,801 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-08-18 17:05:25,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-08-18 17:05:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 17:05:25,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:25,803 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] [2020-08-18 17:05:25,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:05:25,804 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-08-18 17:05:25,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:25,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193692243] [2020-08-18 17:05:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 17:05:25,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193692243] [2020-08-18 17:05:25,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:25,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:25,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545334329] [2020-08-18 17:05:25,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:25,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:25,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:25,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:25,902 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-08-18 17:05:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:26,124 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-08-18 17:05:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:26,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-08-18 17:05:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:26,129 INFO L225 Difference]: With dead ends: 1547 [2020-08-18 17:05:26,129 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 17:05:26,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 17:05:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 17:05:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 17:05:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-08-18 17:05:26,173 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-08-18 17:05:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:26,174 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-08-18 17:05:26,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-08-18 17:05:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-18 17:05:26,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:26,177 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] [2020-08-18 17:05:26,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 17:05:26,177 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:26,177 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-08-18 17:05:26,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:26,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077527447] [2020-08-18 17:05:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:26,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 17:05:26,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077527447] [2020-08-18 17:05:26,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:26,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:26,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108546121] [2020-08-18 17:05:26,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:26,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:26,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:26,239 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-08-18 17:05:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:26,487 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-08-18 17:05:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:26,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-08-18 17:05:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:26,493 INFO L225 Difference]: With dead ends: 1573 [2020-08-18 17:05:26,493 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 17:05:26,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 17:05:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 17:05:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 17:05:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-08-18 17:05:26,558 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-08-18 17:05:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:26,558 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-08-18 17:05:26,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-08-18 17:05:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 17:05:26,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:26,561 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] [2020-08-18 17:05:26,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 17:05:26,562 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-08-18 17:05:26,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:26,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366546801] [2020-08-18 17:05:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:26,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 17:05:26,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366546801] [2020-08-18 17:05:26,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:26,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:26,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825698092] [2020-08-18 17:05:26,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:26,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:26,696 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-08-18 17:05:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:26,938 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-08-18 17:05:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:26,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-08-18 17:05:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:26,944 INFO L225 Difference]: With dead ends: 1601 [2020-08-18 17:05:26,944 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 17:05:26,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 17:05:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 17:05:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 17:05:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-08-18 17:05:27,000 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-08-18 17:05:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:27,000 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-08-18 17:05:27,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-08-18 17:05:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 17:05:27,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:27,003 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] [2020-08-18 17:05:27,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 17:05:27,003 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-08-18 17:05:27,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:27,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269984849] [2020-08-18 17:05:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:27,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 17:05:27,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269984849] [2020-08-18 17:05:27,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:27,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:27,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32439868] [2020-08-18 17:05:27,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:27,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:27,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:27,073 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-08-18 17:05:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:27,340 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-08-18 17:05:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:27,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-18 17:05:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:27,345 INFO L225 Difference]: With dead ends: 1656 [2020-08-18 17:05:27,346 INFO L226 Difference]: Without dead ends: 866 [2020-08-18 17:05:27,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-08-18 17:05:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-08-18 17:05:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-08-18 17:05:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-08-18 17:05:27,398 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-08-18 17:05:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:27,398 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-08-18 17:05:27,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-08-18 17:05:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 17:05:27,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:27,402 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] [2020-08-18 17:05:27,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 17:05:27,402 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:27,402 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-08-18 17:05:27,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:27,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162669407] [2020-08-18 17:05:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:27,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 17:05:27,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162669407] [2020-08-18 17:05:27,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:27,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:27,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270553863] [2020-08-18 17:05:27,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:27,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:27,472 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-08-18 17:05:27,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:27,762 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-08-18 17:05:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:27,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-08-18 17:05:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:27,767 INFO L225 Difference]: With dead ends: 1705 [2020-08-18 17:05:27,767 INFO L226 Difference]: Without dead ends: 850 [2020-08-18 17:05:27,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-18 17:05:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-08-18 17:05:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 17:05:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-08-18 17:05:27,811 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-08-18 17:05:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:27,812 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-08-18 17:05:27,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-08-18 17:05:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 17:05:27,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:27,815 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] [2020-08-18 17:05:27,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 17:05:27,815 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:27,816 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-08-18 17:05:27,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:27,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771218610] [2020-08-18 17:05:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:27,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 17:05:27,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771218610] [2020-08-18 17:05:27,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:27,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:27,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347687007] [2020-08-18 17:05:27,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:27,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:27,890 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-08-18 17:05:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:28,155 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-08-18 17:05:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:28,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-08-18 17:05:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:28,162 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 17:05:28,162 INFO L226 Difference]: Without dead ends: 848 [2020-08-18 17:05:28,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-08-18 17:05:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-08-18 17:05:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 17:05:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-08-18 17:05:28,206 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-08-18 17:05:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:28,206 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-08-18 17:05:28,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-08-18 17:05:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 17:05:28,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:28,209 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] [2020-08-18 17:05:28,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 17:05:28,209 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-08-18 17:05:28,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:28,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175190383] [2020-08-18 17:05:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:28,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 17:05:28,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175190383] [2020-08-18 17:05:28,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:28,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:28,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721430287] [2020-08-18 17:05:28,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:28,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:28,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:28,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:28,276 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-08-18 17:05:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:28,562 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-08-18 17:05:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:28,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-18 17:05:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:28,568 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 17:05:28,568 INFO L226 Difference]: Without dead ends: 831 [2020-08-18 17:05:28,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-08-18 17:05:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-08-18 17:05:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-08-18 17:05:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-08-18 17:05:28,620 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-08-18 17:05:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:28,621 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-08-18 17:05:28,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-08-18 17:05:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 17:05:28,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:28,624 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] [2020-08-18 17:05:28,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 17:05:28,624 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-08-18 17:05:28,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:28,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861001490] [2020-08-18 17:05:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:28,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 17:05:28,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861001490] [2020-08-18 17:05:28,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:28,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:28,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166393117] [2020-08-18 17:05:28,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:28,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:28,719 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-08-18 17:05:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:28,818 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-08-18 17:05:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:28,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 17:05:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:28,825 INFO L225 Difference]: With dead ends: 2417 [2020-08-18 17:05:28,825 INFO L226 Difference]: Without dead ends: 1611 [2020-08-18 17:05:28,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-08-18 17:05:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-08-18 17:05:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-08-18 17:05:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-08-18 17:05:28,882 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-08-18 17:05:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:28,883 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-08-18 17:05:28,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-08-18 17:05:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 17:05:28,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:28,885 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] [2020-08-18 17:05:28,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 17:05:28,886 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:28,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-08-18 17:05:28,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:28,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078152337] [2020-08-18 17:05:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:28,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-08-18 17:05:28,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078152337] [2020-08-18 17:05:28,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:28,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:28,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031163629] [2020-08-18 17:05:28,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:28,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:28,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:28,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:28,978 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-08-18 17:05:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:29,078 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-08-18 17:05:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:29,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 17:05:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:29,085 INFO L225 Difference]: With dead ends: 2416 [2020-08-18 17:05:29,086 INFO L226 Difference]: Without dead ends: 1608 [2020-08-18 17:05:29,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-08-18 17:05:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-08-18 17:05:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 17:05:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-08-18 17:05:29,180 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-08-18 17:05:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:29,180 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-08-18 17:05:29,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-08-18 17:05:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-18 17:05:29,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:29,184 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] [2020-08-18 17:05:29,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 17:05:29,184 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-08-18 17:05:29,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:29,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357391417] [2020-08-18 17:05:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:29,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 17:05:29,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357391417] [2020-08-18 17:05:29,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:29,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:29,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324481517] [2020-08-18 17:05:29,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:29,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:29,355 INFO L87 Difference]: Start difference. First operand 1606 states and 2297 transitions. Second operand 3 states. [2020-08-18 17:05:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:29,658 INFO L93 Difference]: Finished difference Result 4752 states and 6785 transitions. [2020-08-18 17:05:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:29,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-08-18 17:05:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:29,674 INFO L225 Difference]: With dead ends: 4752 [2020-08-18 17:05:29,674 INFO L226 Difference]: Without dead ends: 3159 [2020-08-18 17:05:29,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-08-18 17:05:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1606. [2020-08-18 17:05:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 17:05:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2293 transitions. [2020-08-18 17:05:29,833 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2293 transitions. Word has length 161 [2020-08-18 17:05:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:29,834 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2293 transitions. [2020-08-18 17:05:29,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2293 transitions. [2020-08-18 17:05:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 17:05:29,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:29,837 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] [2020-08-18 17:05:29,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 17:05:29,837 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash -179508653, now seen corresponding path program 1 times [2020-08-18 17:05:29,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:29,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040962602] [2020-08-18 17:05:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:29,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 17:05:29,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040962602] [2020-08-18 17:05:29,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:29,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:29,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103657243] [2020-08-18 17:05:29,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:29,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:29,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:29,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:29,945 INFO L87 Difference]: Start difference. First operand 1606 states and 2293 transitions. Second operand 3 states. [2020-08-18 17:05:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:30,231 INFO L93 Difference]: Finished difference Result 4792 states and 6845 transitions. [2020-08-18 17:05:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:30,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-08-18 17:05:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:30,263 INFO L225 Difference]: With dead ends: 4792 [2020-08-18 17:05:30,263 INFO L226 Difference]: Without dead ends: 3199 [2020-08-18 17:05:30,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2020-08-18 17:05:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3197. [2020-08-18 17:05:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-08-18 17:05:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4493 transitions. [2020-08-18 17:05:30,482 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4493 transitions. Word has length 162 [2020-08-18 17:05:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:30,482 INFO L479 AbstractCegarLoop]: Abstraction has 3197 states and 4493 transitions. [2020-08-18 17:05:30,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4493 transitions. [2020-08-18 17:05:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 17:05:30,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:30,487 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] [2020-08-18 17:05:30,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 17:05:30,488 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash 774431505, now seen corresponding path program 1 times [2020-08-18 17:05:30,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:30,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851662280] [2020-08-18 17:05:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:05:30,532 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:05:30,533 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:05:30,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 17:05:30,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:05:30 BoogieIcfgContainer [2020-08-18 17:05:30,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:05:30,597 INFO L168 Benchmark]: Toolchain (without parser) took 16349.64 ms. Allocated memory was 140.0 MB in the beginning and 515.4 MB in the end (delta: 375.4 MB). Free memory was 103.0 MB in the beginning and 95.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 383.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:30,597 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:05:30,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.87 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.8 MB in the beginning and 177.3 MB in the end (delta: -74.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:30,599 INFO L168 Benchmark]: Boogie Preprocessor took 60.57 ms. Allocated memory is still 202.4 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:30,599 INFO L168 Benchmark]: RCFGBuilder took 874.43 ms. Allocated memory is still 202.4 MB. Free memory was 174.6 MB in the beginning and 115.8 MB in the end (delta: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:30,600 INFO L168 Benchmark]: TraceAbstraction took 14856.65 ms. Allocated memory was 202.4 MB in the beginning and 515.4 MB in the end (delta: 313.0 MB). Free memory was 115.1 MB in the beginning and 95.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 333.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:30,601 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 552.87 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.8 MB in the beginning and 177.3 MB in the end (delta: -74.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.57 ms. Allocated memory is still 202.4 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 874.43 ms. Allocated memory is still 202.4 MB. Free memory was 174.6 MB in the beginning and 115.8 MB in the end (delta: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14856.65 ms. Allocated memory was 202.4 MB in the beginning and 515.4 MB in the end (delta: 313.0 MB). Free memory was 115.1 MB in the beginning and 95.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 333.1 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: 14.7s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.5s, 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, 5.2s 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, 0.6s SatisfiabilityAnalysisTime, 1.8s 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...