/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:12:08,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:12:08,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:12:08,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:12:08,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:12:08,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:12:08,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:12:08,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:12:08,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:12:08,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:12:08,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:12:08,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:12:08,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:12:08,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:12:08,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:12:08,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:12:08,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:12:08,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:12:08,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:12:08,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:12:08,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:12:08,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:12:08,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:12:08,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:12:08,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:12:08,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:12:08,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:12:08,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:12:08,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:12:08,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 05:12:08,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:12:08,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:12:08,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:12:08,104 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 [2020-08-19 05:12:08,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:12:08,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:12:08,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:12:08,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:12:08,156 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:12:08,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:12:08,156 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:12:08,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:12:08,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:12:08,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:12:08,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:12:08,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:12:08,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:12:08,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:12:08,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:12:08,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:12:08,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:12:08,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:12:08,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:12:08,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:12:08,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:12:08,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:12:08,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:12:08,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:12:08,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:12:08,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:12:08,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:12:08,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:12:08,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:12:08,161 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=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:12:08,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:12:08,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:12:08,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:12:08,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:12:08,514 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:12:08,515 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-19 05:12:08,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81a87071d/70426ff544544fb6bbc1586d2a1c10c3/FLAGa3157ace0 [2020-08-19 05:12:09,040 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:12:09,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-19 05:12:09,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81a87071d/70426ff544544fb6bbc1586d2a1c10c3/FLAGa3157ace0 [2020-08-19 05:12:09,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81a87071d/70426ff544544fb6bbc1586d2a1c10c3 [2020-08-19 05:12:09,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:12:09,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:12:09,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:09,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:12:09,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:12:09,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e37eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09, skipping insertion in model container [2020-08-19 05:12:09,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:12:09,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:12:09,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:09,725 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:12:09,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:09,774 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:12:09,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09 WrapperNode [2020-08-19 05:12:09,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:09,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:12:09,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:12:09,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:12:09,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (1/1) ... [2020-08-19 05:12:09,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:12:09,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:12:09,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:12:09,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:12:09,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (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 [2020-08-19 05:12:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:12:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:12:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:12:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:12:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:12:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:12:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:12:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:12:10,275 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:12:10,276 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 05:12:10,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:10 BoogieIcfgContainer [2020-08-19 05:12:10,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:12:10,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:12:10,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:12:10,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:12:10,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:12:09" (1/3) ... [2020-08-19 05:12:10,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3239fb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:10, skipping insertion in model container [2020-08-19 05:12:10,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:09" (2/3) ... [2020-08-19 05:12:10,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3239fb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:10, skipping insertion in model container [2020-08-19 05:12:10,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:10" (3/3) ... [2020-08-19 05:12:10,291 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-19 05:12:10,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:12:10,331 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:12:10,346 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:12:10,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:12:10,375 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:12:10,376 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:12:10,376 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:12:10,376 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:12:10,376 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:12:10,376 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:12:10,376 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:12:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-19 05:12:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 05:12:10,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,403 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-19 05:12:10,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823720513] [2020-08-19 05:12:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823720513] [2020-08-19 05:12:10,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493430003] [2020-08-19 05:12:10,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,624 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-19 05:12:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,681 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-19 05:12:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 05:12:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,694 INFO L225 Difference]: With dead ends: 69 [2020-08-19 05:12:10,695 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 05:12:10,698 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 [2020-08-19 05:12:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 05:12:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-19 05:12:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 05:12:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-19 05:12:10,740 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-19 05:12:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,740 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-19 05:12:10,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-19 05:12:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 05:12:10,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:12:10,743 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-19 05:12:10,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270953861] [2020-08-19 05:12:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270953861] [2020-08-19 05:12:10,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980854110] [2020-08-19 05:12:10,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,807 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-19 05:12:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,848 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-19 05:12:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 05:12:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,851 INFO L225 Difference]: With dead ends: 87 [2020-08-19 05:12:10,851 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 05:12:10,853 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 [2020-08-19 05:12:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 05:12:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-19 05:12:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 05:12:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-19 05:12:10,864 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-19 05:12:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,864 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-19 05:12:10,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-19 05:12:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 05:12:10,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:12:10,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-19 05:12:10,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38999423] [2020-08-19 05:12:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38999423] [2020-08-19 05:12:10,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880545846] [2020-08-19 05:12:10,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,929 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-19 05:12:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,972 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-19 05:12:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 05:12:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,975 INFO L225 Difference]: With dead ends: 81 [2020-08-19 05:12:10,975 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 05:12:10,976 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 [2020-08-19 05:12:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 05:12:10,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-19 05:12:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 05:12:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-19 05:12:10,986 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-19 05:12:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,986 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-19 05:12:10,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-19 05:12:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 05:12:10,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:12:10,988 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-19 05:12:10,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975797143] [2020-08-19 05:12:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975797143] [2020-08-19 05:12:11,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109295110] [2020-08-19 05:12:11,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,035 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-19 05:12:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,055 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-19 05:12:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 05:12:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,057 INFO L225 Difference]: With dead ends: 100 [2020-08-19 05:12:11,057 INFO L226 Difference]: Without dead ends: 98 [2020-08-19 05:12:11,058 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 [2020-08-19 05:12:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-19 05:12:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-19 05:12:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 05:12:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-19 05:12:11,068 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-19 05:12:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,069 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-19 05:12:11,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-19 05:12:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 05:12:11,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:11,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:12:11,071 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,071 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-19 05:12:11,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967536309] [2020-08-19 05:12:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967536309] [2020-08-19 05:12:11,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113268646] [2020-08-19 05:12:11,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,109 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-19 05:12:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,130 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-19 05:12:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 05:12:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,132 INFO L225 Difference]: With dead ends: 164 [2020-08-19 05:12:11,132 INFO L226 Difference]: Without dead ends: 100 [2020-08-19 05:12:11,133 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 [2020-08-19 05:12:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-19 05:12:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-19 05:12:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-19 05:12:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-19 05:12:11,145 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-19 05:12:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,145 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-19 05:12:11,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-19 05:12:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:11,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:11,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:12:11,148 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-19 05:12:11,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805656327] [2020-08-19 05:12:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805656327] [2020-08-19 05:12:11,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261002778] [2020-08-19 05:12:11,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,195 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-19 05:12:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,214 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-19 05:12:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,217 INFO L225 Difference]: With dead ends: 147 [2020-08-19 05:12:11,217 INFO L226 Difference]: Without dead ends: 102 [2020-08-19 05:12:11,218 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 [2020-08-19 05:12:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-19 05:12:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-19 05:12:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 05:12:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-19 05:12:11,230 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-19 05:12:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,230 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-19 05:12:11,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-19 05:12:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:11,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:11,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:12:11,233 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-19 05:12:11,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211969480] [2020-08-19 05:12:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211969480] [2020-08-19 05:12:11,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171963905] [2020-08-19 05:12:11,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,295 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-19 05:12:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,332 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-19 05:12:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,335 INFO L225 Difference]: With dead ends: 180 [2020-08-19 05:12:11,335 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 05:12:11,336 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 [2020-08-19 05:12:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 05:12:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-19 05:12:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 05:12:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-19 05:12:11,360 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-19 05:12:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,360 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-19 05:12:11,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-19 05:12:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:11,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:11,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:12:11,375 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-19 05:12:11,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742102793] [2020-08-19 05:12:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742102793] [2020-08-19 05:12:11,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182389496] [2020-08-19 05:12:11,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,440 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-19 05:12:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,463 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-19 05:12:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,466 INFO L225 Difference]: With dead ends: 312 [2020-08-19 05:12:11,466 INFO L226 Difference]: Without dead ends: 186 [2020-08-19 05:12:11,467 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 [2020-08-19 05:12:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-19 05:12:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-19 05:12:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-19 05:12:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-19 05:12:11,480 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-19 05:12:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,481 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-19 05:12:11,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-19 05:12:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:11,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,483 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] [2020-08-19 05:12:11,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:12:11,484 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-19 05:12:11,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799204217] [2020-08-19 05:12:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799204217] [2020-08-19 05:12:11,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427343032] [2020-08-19 05:12:11,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,512 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-19 05:12:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,531 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-19 05:12:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,533 INFO L225 Difference]: With dead ends: 276 [2020-08-19 05:12:11,534 INFO L226 Difference]: Without dead ends: 190 [2020-08-19 05:12:11,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-19 05:12:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-19 05:12:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-19 05:12:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-19 05:12:11,547 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-19 05:12:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,547 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-19 05:12:11,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-19 05:12:11,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:11,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,549 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] [2020-08-19 05:12:11,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:12:11,550 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-19 05:12:11,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609368131] [2020-08-19 05:12:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609368131] [2020-08-19 05:12:11,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967968954] [2020-08-19 05:12:11,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,581 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-19 05:12:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,602 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-19 05:12:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,605 INFO L225 Difference]: With dead ends: 332 [2020-08-19 05:12:11,605 INFO L226 Difference]: Without dead ends: 330 [2020-08-19 05:12:11,606 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 [2020-08-19 05:12:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-19 05:12:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-19 05:12:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-19 05:12:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-19 05:12:11,619 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-19 05:12:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,620 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-19 05:12:11,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-19 05:12:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:11,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,622 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] [2020-08-19 05:12:11,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:12:11,623 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-19 05:12:11,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253395130] [2020-08-19 05:12:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253395130] [2020-08-19 05:12:11,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983724448] [2020-08-19 05:12:11,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,671 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-19 05:12:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,712 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-19 05:12:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,715 INFO L225 Difference]: With dead ends: 604 [2020-08-19 05:12:11,715 INFO L226 Difference]: Without dead ends: 354 [2020-08-19 05:12:11,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-19 05:12:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-19 05:12:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-19 05:12:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-19 05:12:11,733 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-19 05:12:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,733 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-19 05:12:11,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-19 05:12:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:11,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,736 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] [2020-08-19 05:12:11,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:12:11,736 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-19 05:12:11,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954379545] [2020-08-19 05:12:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954379545] [2020-08-19 05:12:11,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363014260] [2020-08-19 05:12:11,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,765 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-19 05:12:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,786 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-19 05:12:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,789 INFO L225 Difference]: With dead ends: 528 [2020-08-19 05:12:11,789 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 05:12:11,790 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 [2020-08-19 05:12:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 05:12:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-19 05:12:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 05:12:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-19 05:12:11,804 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-19 05:12:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,805 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-19 05:12:11,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-19 05:12:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:11,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,807 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] [2020-08-19 05:12:11,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 05:12:11,807 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-19 05:12:11,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102250009] [2020-08-19 05:12:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102250009] [2020-08-19 05:12:11,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745153353] [2020-08-19 05:12:11,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,836 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-19 05:12:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,859 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-19 05:12:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,863 INFO L225 Difference]: With dead ends: 620 [2020-08-19 05:12:11,864 INFO L226 Difference]: Without dead ends: 618 [2020-08-19 05:12:11,864 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 [2020-08-19 05:12:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-19 05:12:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-19 05:12:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-19 05:12:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-19 05:12:11,883 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-19 05:12:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,884 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-19 05:12:11,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-19 05:12:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:11,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,886 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] [2020-08-19 05:12:11,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 05:12:11,886 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-19 05:12:11,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297643016] [2020-08-19 05:12:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297643016] [2020-08-19 05:12:11,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162925035] [2020-08-19 05:12:11,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,912 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-19 05:12:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,939 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-19 05:12:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,943 INFO L225 Difference]: With dead ends: 1180 [2020-08-19 05:12:11,944 INFO L226 Difference]: Without dead ends: 682 [2020-08-19 05:12:11,945 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 [2020-08-19 05:12:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-19 05:12:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-19 05:12:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-19 05:12:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-19 05:12:11,970 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-19 05:12:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,971 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-19 05:12:11,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-19 05:12:11,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:11,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,973 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] [2020-08-19 05:12:11,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 05:12:11,973 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,973 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-19 05:12:11,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196180594] [2020-08-19 05:12:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:12,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196180594] [2020-08-19 05:12:12,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:12,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:12,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302283438] [2020-08-19 05:12:12,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:12,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,002 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-19 05:12:12,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:12,030 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-19 05:12:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:12,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:12,035 INFO L225 Difference]: With dead ends: 1020 [2020-08-19 05:12:12,035 INFO L226 Difference]: Without dead ends: 698 [2020-08-19 05:12:12,036 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 [2020-08-19 05:12:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-19 05:12:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-19 05:12:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-19 05:12:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-19 05:12:12,063 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-19 05:12:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:12,064 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-19 05:12:12,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-19 05:12:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:12,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:12,066 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] [2020-08-19 05:12:12,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 05:12:12,066 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-19 05:12:12,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:12,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172576385] [2020-08-19 05:12:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:12,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172576385] [2020-08-19 05:12:12,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:12,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:12,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263234891] [2020-08-19 05:12:12,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:12,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,094 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-19 05:12:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:12,128 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-19 05:12:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:12,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:12,135 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 05:12:12,135 INFO L226 Difference]: Without dead ends: 1162 [2020-08-19 05:12:12,136 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 [2020-08-19 05:12:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-19 05:12:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-19 05:12:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-19 05:12:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-19 05:12:12,182 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-19 05:12:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:12,183 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-19 05:12:12,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-19 05:12:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:12,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:12,185 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] [2020-08-19 05:12:12,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 05:12:12,186 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:12,186 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-19 05:12:12,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:12,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795416370] [2020-08-19 05:12:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:12,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795416370] [2020-08-19 05:12:12,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:12,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:12,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559738768] [2020-08-19 05:12:12,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:12,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:12,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:12,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,212 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-19 05:12:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:12,256 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-19 05:12:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:12,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:12,262 INFO L225 Difference]: With dead ends: 2316 [2020-08-19 05:12:12,263 INFO L226 Difference]: Without dead ends: 1322 [2020-08-19 05:12:12,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-19 05:12:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-19 05:12:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-19 05:12:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-19 05:12:12,305 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-19 05:12:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:12,306 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-19 05:12:12,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-19 05:12:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:12,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:12,308 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] [2020-08-19 05:12:12,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 05:12:12,308 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-19 05:12:12,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:12,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947175886] [2020-08-19 05:12:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:12,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947175886] [2020-08-19 05:12:12,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:12,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:12,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513056047] [2020-08-19 05:12:12,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:12,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,328 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-19 05:12:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:12,362 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-19 05:12:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:12,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:12,369 INFO L225 Difference]: With dead ends: 1980 [2020-08-19 05:12:12,369 INFO L226 Difference]: Without dead ends: 1354 [2020-08-19 05:12:12,371 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 [2020-08-19 05:12:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-19 05:12:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-19 05:12:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-19 05:12:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-19 05:12:12,413 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-19 05:12:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:12,413 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-19 05:12:12,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-19 05:12:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:12,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:12,416 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] [2020-08-19 05:12:12,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 05:12:12,416 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-19 05:12:12,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:12,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544662098] [2020-08-19 05:12:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:12,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544662098] [2020-08-19 05:12:12,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:12,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:12,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932157267] [2020-08-19 05:12:12,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:12,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:12,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:12,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,436 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-19 05:12:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:12,498 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-19 05:12:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:12,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:12,510 INFO L225 Difference]: With dead ends: 2186 [2020-08-19 05:12:12,510 INFO L226 Difference]: Without dead ends: 2184 [2020-08-19 05:12:12,511 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 [2020-08-19 05:12:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-19 05:12:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-19 05:12:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-19 05:12:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-19 05:12:12,596 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-19 05:12:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:12,597 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-19 05:12:12,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-19 05:12:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:12,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:12,602 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] [2020-08-19 05:12:12,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 05:12:12,602 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-19 05:12:12,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:12,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936251315] [2020-08-19 05:12:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:12,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936251315] [2020-08-19 05:12:12,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:12,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:12,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343802482] [2020-08-19 05:12:12,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:12,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:12,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,621 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-19 05:12:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:12,744 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-19 05:12:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:12,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:12,745 INFO L225 Difference]: With dead ends: 4552 [2020-08-19 05:12:12,745 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:12:12,754 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 [2020-08-19 05:12:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:12:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:12:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:12:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:12:12,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-19 05:12:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:12,756 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:12:12,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:12:12,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:12:12,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 05:12:12,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:12:12,782 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:12:12,783 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:12,783 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:12,783 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:12:12,783 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:12:12,783 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:12:12,783 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-19 05:12:12,783 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-19 05:12:12,783 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,783 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-19 05:12:12,784 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-19 05:12:12,784 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-19 05:12:12,784 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-19 05:12:12,784 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-19 05:12:12,784 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,784 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-19 05:12:12,784 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,784 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-19 05:12:12,785 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,786 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,786 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,786 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-19 05:12:12,786 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,786 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-19 05:12:12,786 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-19 05:12:12,786 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,786 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 05:12:12,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:12:12 BoogieIcfgContainer [2020-08-19 05:12:12,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:12:12,800 INFO L168 Benchmark]: Toolchain (without parser) took 3377.09 ms. Allocated memory was 140.5 MB in the beginning and 245.4 MB in the end (delta: 104.9 MB). Free memory was 104.0 MB in the beginning and 205.9 MB in the end (delta: -101.9 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:12,801 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 05:12:12,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.96 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:12,802 INFO L168 Benchmark]: Boogie Preprocessor took 124.85 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.1 MB in the beginning and 180.5 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:12,803 INFO L168 Benchmark]: RCFGBuilder took 380.98 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 163.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:12,803 INFO L168 Benchmark]: TraceAbstraction took 2513.98 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 163.2 MB in the beginning and 205.9 MB in the end (delta: -42.8 MB). Peak memory consumption was 238.6 kB. Max. memory is 7.1 GB. [2020-08-19 05:12:12,806 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.96 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.85 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.1 MB in the beginning and 180.5 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.98 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 163.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2513.98 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 163.2 MB in the beginning and 205.9 MB in the end (delta: -42.8 MB). Peak memory consumption was 238.6 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...