./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2018/Problem10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2018/Problem10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 13:01:35,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:01:35,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:01:35,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:01:35,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:01:35,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:01:35,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:01:35,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:01:35,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:01:35,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:01:35,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:01:35,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:01:35,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:01:35,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:01:35,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:01:35,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:01:35,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:01:35,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:01:35,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:01:35,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:01:35,888 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:01:35,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:01:35,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:01:35,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:01:35,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:01:35,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:01:35,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:01:35,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:01:35,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:01:35,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:01:35,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:01:35,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:01:35,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:01:35,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:01:35,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:01:35,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:01:35,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:01:35,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:01:35,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:01:35,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:01:35,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:01:35,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:01:35,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 13:01:35,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:01:35,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:01:35,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:01:35,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:01:35,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:01:35,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:01:35,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:01:35,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:01:35,932 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:01:35,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:01:35,933 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:01:35,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 13:01:35,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:01:35,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:01:35,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:01:35,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:01:35,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:01:35,934 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:01:35,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:01:35,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:01:35,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:01:35,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:01:35,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:01:35,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:01:35,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:01:35,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:01:35,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:01:35,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:01:35,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 13:01:35,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 13:01:35,937 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:01:35,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:01:35,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:01:35,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2022-07-19 13:01:36,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:01:36,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:01:36,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:01:36,161 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:01:36,170 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:01:36,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem10.c [2022-07-19 13:01:36,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caac4185/67c735364c41422d9d24dc26500988bd/FLAG118a1e16a [2022-07-19 13:01:36,664 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:01:36,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem10.c [2022-07-19 13:01:36,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caac4185/67c735364c41422d9d24dc26500988bd/FLAG118a1e16a [2022-07-19 13:01:36,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caac4185/67c735364c41422d9d24dc26500988bd [2022-07-19 13:01:36,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:01:36,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:01:36,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:01:36,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:01:36,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:01:36,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:01:36" (1/1) ... [2022-07-19 13:01:36,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee2068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:36, skipping insertion in model container [2022-07-19 13:01:36,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:01:36" (1/1) ... [2022-07-19 13:01:36,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:01:36,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:01:36,902 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2022-07-19 13:01:36,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2022-07-19 13:01:37,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:01:37,170 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:01:37,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2022-07-19 13:01:37,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2022-07-19 13:01:37,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:01:37,296 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:01:37,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37 WrapperNode [2022-07-19 13:01:37,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:01:37,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:01:37,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:01:37,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:01:37,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,375 INFO L137 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 865 [2022-07-19 13:01:37,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:01:37,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:01:37,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:01:37,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:01:37,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:01:37,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:01:37,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:01:37,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:01:37,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (1/1) ... [2022-07-19 13:01:37,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:01:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:01:37,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 13:01:37,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 13:01:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:01:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-07-19 13:01:37,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-07-19 13:01:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-07-19 13:01:37,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-07-19 13:01:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 13:01:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:01:37,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:01:37,602 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:01:37,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:01:38,292 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:01:38,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:01:38,306 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 13:01:38,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:01:38 BoogieIcfgContainer [2022-07-19 13:01:38,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:01:38,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:01:38,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:01:38,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:01:38,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:01:36" (1/3) ... [2022-07-19 13:01:38,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777d09f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:01:38, skipping insertion in model container [2022-07-19 13:01:38,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:01:37" (2/3) ... [2022-07-19 13:01:38,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777d09f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:01:38, skipping insertion in model container [2022-07-19 13:01:38,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:01:38" (3/3) ... [2022-07-19 13:01:38,315 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10.c [2022-07-19 13:01:38,325 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:01:38,325 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 13:01:38,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:01:38,398 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@500f3085, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1d390dc4 [2022-07-19 13:01:38,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 13:01:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-07-19 13:01:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 13:01:38,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:38,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:38,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1184212657, now seen corresponding path program 1 times [2022-07-19 13:01:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423607384] [2022-07-19 13:01:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:38,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423607384] [2022-07-19 13:01:38,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423607384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:38,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:38,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:38,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406268050] [2022-07-19 13:01:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:38,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 13:01:38,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:38,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 13:01:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:01:38,646 INFO L87 Difference]: Start difference. First operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:39,611 INFO L93 Difference]: Finished difference Result 1165 states and 2069 transitions. [2022-07-19 13:01:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 13:01:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 13:01:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:39,631 INFO L225 Difference]: With dead ends: 1165 [2022-07-19 13:01:39,631 INFO L226 Difference]: Without dead ends: 690 [2022-07-19 13:01:39,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:01:39,641 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 373 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:39,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 772 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 13:01:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-07-19 13:01:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 557. [2022-07-19 13:01:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 455 states have (on average 1.589010989010989) internal successors, (723), 554 states have internal predecessors, (723), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 823 transitions. [2022-07-19 13:01:39,726 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 823 transitions. Word has length 13 [2022-07-19 13:01:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:39,727 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 823 transitions. [2022-07-19 13:01:39,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 823 transitions. [2022-07-19 13:01:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 13:01:39,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:39,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:39,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 13:01:39,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:39,730 INFO L85 PathProgramCache]: Analyzing trace with hash -249172658, now seen corresponding path program 1 times [2022-07-19 13:01:39,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:39,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706290723] [2022-07-19 13:01:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706290723] [2022-07-19 13:01:39,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706290723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:39,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:39,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837604935] [2022-07-19 13:01:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 13:01:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 13:01:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:01:39,797 INFO L87 Difference]: Start difference. First operand 557 states and 823 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:40,372 INFO L93 Difference]: Finished difference Result 1704 states and 2582 transitions. [2022-07-19 13:01:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 13:01:40,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 13:01:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:40,377 INFO L225 Difference]: With dead ends: 1704 [2022-07-19 13:01:40,377 INFO L226 Difference]: Without dead ends: 1149 [2022-07-19 13:01:40,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:01:40,379 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 845 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:40,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 1116 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 13:01:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-07-19 13:01:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 888. [2022-07-19 13:01:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5521628498727735) internal successors, (1220), 885 states have internal predecessors, (1220), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1320 transitions. [2022-07-19 13:01:40,400 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1320 transitions. Word has length 21 [2022-07-19 13:01:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:40,401 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1320 transitions. [2022-07-19 13:01:40,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1320 transitions. [2022-07-19 13:01:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 13:01:40,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:40,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:40,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 13:01:40,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:40,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1086962958, now seen corresponding path program 1 times [2022-07-19 13:01:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418922470] [2022-07-19 13:01:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:40,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:40,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:40,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418922470] [2022-07-19 13:01:40,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418922470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:40,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:40,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:40,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108462655] [2022-07-19 13:01:40,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:40,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:40,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:40,443 INFO L87 Difference]: Start difference. First operand 888 states and 1320 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:40,476 INFO L93 Difference]: Finished difference Result 2645 states and 3935 transitions. [2022-07-19 13:01:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 13:01:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:40,481 INFO L225 Difference]: With dead ends: 2645 [2022-07-19 13:01:40,482 INFO L226 Difference]: Without dead ends: 1759 [2022-07-19 13:01:40,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:40,484 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 461 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:40,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1255 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:01:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-07-19 13:01:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 888. [2022-07-19 13:01:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5508905852417303) internal successors, (1219), 885 states have internal predecessors, (1219), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1319 transitions. [2022-07-19 13:01:40,508 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1319 transitions. Word has length 24 [2022-07-19 13:01:40,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:40,508 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1319 transitions. [2022-07-19 13:01:40,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1319 transitions. [2022-07-19 13:01:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 13:01:40,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:40,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:40,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 13:01:40,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:40,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:40,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1345128396, now seen corresponding path program 1 times [2022-07-19 13:01:40,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:40,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725645757] [2022-07-19 13:01:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:40,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:40,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725645757] [2022-07-19 13:01:40,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725645757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:40,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:40,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:40,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833862161] [2022-07-19 13:01:40,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:40,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:40,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:40,535 INFO L87 Difference]: Start difference. First operand 888 states and 1319 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:40,649 INFO L93 Difference]: Finished difference Result 2201 states and 3265 transitions. [2022-07-19 13:01:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 13:01:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:40,653 INFO L225 Difference]: With dead ends: 2201 [2022-07-19 13:01:40,653 INFO L226 Difference]: Without dead ends: 1315 [2022-07-19 13:01:40,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:40,655 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 533 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:40,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1382 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 13:01:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-07-19 13:01:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1231. [2022-07-19 13:01:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1129 states have (on average 1.5491585473870682) internal successors, (1749), 1228 states have internal predecessors, (1749), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1849 transitions. [2022-07-19 13:01:40,678 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1849 transitions. Word has length 24 [2022-07-19 13:01:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:40,678 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1849 transitions. [2022-07-19 13:01:40,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1849 transitions. [2022-07-19 13:01:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 13:01:40,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:40,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:40,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 13:01:40,679 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash 500156944, now seen corresponding path program 1 times [2022-07-19 13:01:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:40,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125872570] [2022-07-19 13:01:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:40,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:40,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125872570] [2022-07-19 13:01:40,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125872570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:40,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:40,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568132976] [2022-07-19 13:01:40,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:40,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:40,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:40,704 INFO L87 Difference]: Start difference. First operand 1231 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:41,120 INFO L93 Difference]: Finished difference Result 3169 states and 4832 transitions. [2022-07-19 13:01:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 13:01:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:41,126 INFO L225 Difference]: With dead ends: 3169 [2022-07-19 13:01:41,126 INFO L226 Difference]: Without dead ends: 1940 [2022-07-19 13:01:41,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:41,129 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 310 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:41,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 801 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 13:01:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-07-19 13:01:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1397. [2022-07-19 13:01:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1295 states have (on average 1.4517374517374517) internal successors, (1880), 1394 states have internal predecessors, (1880), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1980 transitions. [2022-07-19 13:01:41,157 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1980 transitions. Word has length 24 [2022-07-19 13:01:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:41,157 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1980 transitions. [2022-07-19 13:01:41,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1980 transitions. [2022-07-19 13:01:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 13:01:41,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:41,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:41,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 13:01:41,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1201221522, now seen corresponding path program 1 times [2022-07-19 13:01:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:41,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736996996] [2022-07-19 13:01:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:41,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:41,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:41,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736996996] [2022-07-19 13:01:41,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736996996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:41,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:41,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:01:41,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408647080] [2022-07-19 13:01:41,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:41,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:41,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:41,179 INFO L87 Difference]: Start difference. First operand 1397 states and 1980 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:41,254 INFO L93 Difference]: Finished difference Result 4140 states and 5880 transitions. [2022-07-19 13:01:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:41,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 13:01:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:41,262 INFO L225 Difference]: With dead ends: 4140 [2022-07-19 13:01:41,262 INFO L226 Difference]: Without dead ends: 2745 [2022-07-19 13:01:41,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:41,265 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 510 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:41,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1073 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:01:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-07-19 13:01:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2657. [2022-07-19 13:01:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2555 states have (on average 1.4348336594911937) internal successors, (3666), 2654 states have internal predecessors, (3666), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3766 transitions. [2022-07-19 13:01:41,340 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3766 transitions. Word has length 24 [2022-07-19 13:01:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:41,340 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 3766 transitions. [2022-07-19 13:01:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3766 transitions. [2022-07-19 13:01:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 13:01:41,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:41,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:41,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 13:01:41,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1417555436, now seen corresponding path program 1 times [2022-07-19 13:01:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:41,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028904182] [2022-07-19 13:01:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:41,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:41,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028904182] [2022-07-19 13:01:41,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028904182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:41,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:41,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125159704] [2022-07-19 13:01:41,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:41,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:41,385 INFO L87 Difference]: Start difference. First operand 2657 states and 3766 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:41,789 INFO L93 Difference]: Finished difference Result 6143 states and 8908 transitions. [2022-07-19 13:01:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 13:01:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:41,799 INFO L225 Difference]: With dead ends: 6143 [2022-07-19 13:01:41,800 INFO L226 Difference]: Without dead ends: 3488 [2022-07-19 13:01:41,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:41,805 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 230 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:41,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 722 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 13:01:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-07-19 13:01:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3484. [2022-07-19 13:01:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3382 states have (on average 1.3746303962152573) internal successors, (4649), 3481 states have internal predecessors, (4649), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 4749 transitions. [2022-07-19 13:01:41,865 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 4749 transitions. Word has length 25 [2022-07-19 13:01:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:41,867 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 4749 transitions. [2022-07-19 13:01:41,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 4749 transitions. [2022-07-19 13:01:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 13:01:41,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:41,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:41,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 13:01:41,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:41,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2032440408, now seen corresponding path program 1 times [2022-07-19 13:01:41,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:41,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219523572] [2022-07-19 13:01:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:41,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:41,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219523572] [2022-07-19 13:01:41,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219523572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:41,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:41,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:41,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063762677] [2022-07-19 13:01:41,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:41,916 INFO L87 Difference]: Start difference. First operand 3484 states and 4749 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:42,337 INFO L93 Difference]: Finished difference Result 7813 states and 10890 transitions. [2022-07-19 13:01:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 13:01:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:42,349 INFO L225 Difference]: With dead ends: 7813 [2022-07-19 13:01:42,349 INFO L226 Difference]: Without dead ends: 4331 [2022-07-19 13:01:42,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:42,357 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 299 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:42,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 682 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 13:01:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2022-07-19 13:01:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4327. [2022-07-19 13:01:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4225 states have (on average 1.353846153846154) internal successors, (5720), 4324 states have internal predecessors, (5720), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5820 transitions. [2022-07-19 13:01:42,425 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5820 transitions. Word has length 25 [2022-07-19 13:01:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:42,426 INFO L495 AbstractCegarLoop]: Abstraction has 4327 states and 5820 transitions. [2022-07-19 13:01:42,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5820 transitions. [2022-07-19 13:01:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 13:01:42,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:42,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:42,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 13:01:42,431 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash -995255721, now seen corresponding path program 1 times [2022-07-19 13:01:42,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293370090] [2022-07-19 13:01:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:42,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:42,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293370090] [2022-07-19 13:01:42,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293370090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:42,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:42,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:42,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453362622] [2022-07-19 13:01:42,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:42,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:42,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:42,467 INFO L87 Difference]: Start difference. First operand 4327 states and 5820 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:42,528 INFO L93 Difference]: Finished difference Result 8549 states and 11509 transitions. [2022-07-19 13:01:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 13:01:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:42,564 INFO L225 Difference]: With dead ends: 8549 [2022-07-19 13:01:42,565 INFO L226 Difference]: Without dead ends: 8542 [2022-07-19 13:01:42,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:42,571 INFO L413 NwaCegarLoop]: 1005 mSDtfsCounter, 548 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:42,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1555 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:01:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8542 states. [2022-07-19 13:01:42,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8542 to 8441. [2022-07-19 13:01:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8339 states have (on average 1.3492025422712555) internal successors, (11251), 8438 states have internal predecessors, (11251), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 11351 transitions. [2022-07-19 13:01:42,690 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 11351 transitions. Word has length 26 [2022-07-19 13:01:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:42,691 INFO L495 AbstractCegarLoop]: Abstraction has 8441 states and 11351 transitions. [2022-07-19 13:01:42,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 11351 transitions. [2022-07-19 13:01:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 13:01:42,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:42,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:42,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 13:01:42,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1419566957, now seen corresponding path program 1 times [2022-07-19 13:01:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:42,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385871962] [2022-07-19 13:01:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385871962] [2022-07-19 13:01:42,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385871962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:42,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:42,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:01:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819047067] [2022-07-19 13:01:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:42,736 INFO L87 Difference]: Start difference. First operand 8441 states and 11351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:42,829 INFO L93 Difference]: Finished difference Result 16979 states and 22797 transitions. [2022-07-19 13:01:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 13:01:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:42,844 INFO L225 Difference]: With dead ends: 16979 [2022-07-19 13:01:42,845 INFO L226 Difference]: Without dead ends: 8540 [2022-07-19 13:01:42,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:42,856 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 533 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:42,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1209 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:01:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2022-07-19 13:01:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8439. [2022-07-19 13:01:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8339 states have (on average 1.3441659671423432) internal successors, (11209), 8436 states have internal predecessors, (11209), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 11307 transitions. [2022-07-19 13:01:42,970 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 11307 transitions. Word has length 26 [2022-07-19 13:01:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:42,971 INFO L495 AbstractCegarLoop]: Abstraction has 8439 states and 11307 transitions. [2022-07-19 13:01:42,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 11307 transitions. [2022-07-19 13:01:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 13:01:42,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:42,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:42,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 13:01:42,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1314457887, now seen corresponding path program 1 times [2022-07-19 13:01:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:42,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619176197] [2022-07-19 13:01:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:43,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619176197] [2022-07-19 13:01:43,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619176197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:43,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:43,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:01:43,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801882148] [2022-07-19 13:01:43,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:43,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:43,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:43,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:43,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:43,016 INFO L87 Difference]: Start difference. First operand 8439 states and 11307 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:43,120 INFO L93 Difference]: Finished difference Result 25142 states and 33722 transitions. [2022-07-19 13:01:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 13:01:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:43,146 INFO L225 Difference]: With dead ends: 25142 [2022-07-19 13:01:43,146 INFO L226 Difference]: Without dead ends: 16705 [2022-07-19 13:01:43,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:43,161 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 526 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:43,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:01:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16705 states. [2022-07-19 13:01:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16705 to 16607. [2022-07-19 13:01:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16607 states, 16507 states have (on average 1.3390076937057007) internal successors, (22103), 16604 states have internal predecessors, (22103), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16607 states to 16607 states and 22201 transitions. [2022-07-19 13:01:43,390 INFO L78 Accepts]: Start accepts. Automaton has 16607 states and 22201 transitions. Word has length 28 [2022-07-19 13:01:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:43,441 INFO L495 AbstractCegarLoop]: Abstraction has 16607 states and 22201 transitions. [2022-07-19 13:01:43,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16607 states and 22201 transitions. [2022-07-19 13:01:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 13:01:43,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:43,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:43,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 13:01:43,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:43,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:43,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1594983404, now seen corresponding path program 1 times [2022-07-19 13:01:43,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:43,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354351939] [2022-07-19 13:01:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354351939] [2022-07-19 13:01:43,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354351939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:43,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:43,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:43,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878048395] [2022-07-19 13:01:43,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:43,469 INFO L87 Difference]: Start difference. First operand 16607 states and 22201 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:43,681 INFO L93 Difference]: Finished difference Result 48238 states and 64732 transitions. [2022-07-19 13:01:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:43,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 13:01:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:43,734 INFO L225 Difference]: With dead ends: 48238 [2022-07-19 13:01:43,734 INFO L226 Difference]: Without dead ends: 31633 [2022-07-19 13:01:43,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:43,761 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 504 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:43,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1352 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 13:01:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31633 states. [2022-07-19 13:01:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31633 to 31544. [2022-07-19 13:01:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31544 states, 31444 states have (on average 1.3317644065640504) internal successors, (41876), 31541 states have internal predecessors, (41876), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31544 states to 31544 states and 41974 transitions. [2022-07-19 13:01:44,290 INFO L78 Accepts]: Start accepts. Automaton has 31544 states and 41974 transitions. Word has length 33 [2022-07-19 13:01:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:44,290 INFO L495 AbstractCegarLoop]: Abstraction has 31544 states and 41974 transitions. [2022-07-19 13:01:44,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 31544 states and 41974 transitions. [2022-07-19 13:01:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 13:01:44,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:44,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:44,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 13:01:44,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash 132362279, now seen corresponding path program 1 times [2022-07-19 13:01:44,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:44,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818475848] [2022-07-19 13:01:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:44,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:44,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:44,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818475848] [2022-07-19 13:01:44,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818475848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:44,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:44,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:44,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691727109] [2022-07-19 13:01:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:44,326 INFO L87 Difference]: Start difference. First operand 31544 states and 41974 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:44,807 INFO L93 Difference]: Finished difference Result 73175 states and 97409 transitions. [2022-07-19 13:01:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 13:01:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:44,954 INFO L225 Difference]: With dead ends: 73175 [2022-07-19 13:01:44,954 INFO L226 Difference]: Without dead ends: 41633 [2022-07-19 13:01:44,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:44,982 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 483 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:44,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 965 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 13:01:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41633 states. [2022-07-19 13:01:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41633 to 41551. [2022-07-19 13:01:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41551 states, 41451 states have (on average 1.3153603049383609) internal successors, (54523), 41548 states have internal predecessors, (54523), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41551 states to 41551 states and 54621 transitions. [2022-07-19 13:01:45,561 INFO L78 Accepts]: Start accepts. Automaton has 41551 states and 54621 transitions. Word has length 34 [2022-07-19 13:01:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:45,562 INFO L495 AbstractCegarLoop]: Abstraction has 41551 states and 54621 transitions. [2022-07-19 13:01:45,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 41551 states and 54621 transitions. [2022-07-19 13:01:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 13:01:45,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:45,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 13:01:45,563 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash -209128006, now seen corresponding path program 1 times [2022-07-19 13:01:45,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:45,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162914725] [2022-07-19 13:01:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:45,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162914725] [2022-07-19 13:01:45,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162914725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:45,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:45,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:45,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378603295] [2022-07-19 13:01:45,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:45,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:45,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:45,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:45,588 INFO L87 Difference]: Start difference. First operand 41551 states and 54621 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:46,102 INFO L93 Difference]: Finished difference Result 105458 states and 138388 transitions. [2022-07-19 13:01:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 13:01:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:46,275 INFO L225 Difference]: With dead ends: 105458 [2022-07-19 13:01:46,275 INFO L226 Difference]: Without dead ends: 63909 [2022-07-19 13:01:46,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:46,308 INFO L413 NwaCegarLoop]: 980 mSDtfsCounter, 440 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:46,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 13:01:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63909 states. [2022-07-19 13:01:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63909 to 59950. [2022-07-19 13:01:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59950 states, 59850 states have (on average 1.2822222222222222) internal successors, (76741), 59947 states have internal predecessors, (76741), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59950 states to 59950 states and 76839 transitions. [2022-07-19 13:01:47,213 INFO L78 Accepts]: Start accepts. Automaton has 59950 states and 76839 transitions. Word has length 40 [2022-07-19 13:01:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:47,213 INFO L495 AbstractCegarLoop]: Abstraction has 59950 states and 76839 transitions. [2022-07-19 13:01:47,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 59950 states and 76839 transitions. [2022-07-19 13:01:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 13:01:47,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:47,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:47,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 13:01:47,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1653138166, now seen corresponding path program 1 times [2022-07-19 13:01:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:47,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344951670] [2022-07-19 13:01:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:47,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:47,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344951670] [2022-07-19 13:01:47,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344951670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:47,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:01:47,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683481366] [2022-07-19 13:01:47,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:47,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:47,252 INFO L87 Difference]: Start difference. First operand 59950 states and 76839 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:47,805 INFO L93 Difference]: Finished difference Result 157117 states and 202813 transitions. [2022-07-19 13:01:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:47,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 13:01:47,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:47,979 INFO L225 Difference]: With dead ends: 157117 [2022-07-19 13:01:47,979 INFO L226 Difference]: Without dead ends: 97169 [2022-07-19 13:01:48,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:48,023 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 450 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:48,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 984 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 13:01:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97169 states. [2022-07-19 13:01:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97169 to 97090. [2022-07-19 13:01:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97090 states, 96990 states have (on average 1.274615939787607) internal successors, (123625), 97087 states have internal predecessors, (123625), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97090 states to 97090 states and 123723 transitions. [2022-07-19 13:01:49,304 INFO L78 Accepts]: Start accepts. Automaton has 97090 states and 123723 transitions. Word has length 40 [2022-07-19 13:01:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:49,304 INFO L495 AbstractCegarLoop]: Abstraction has 97090 states and 123723 transitions. [2022-07-19 13:01:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 97090 states and 123723 transitions. [2022-07-19 13:01:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 13:01:49,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:49,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 13:01:49,305 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1240470838, now seen corresponding path program 1 times [2022-07-19 13:01:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:49,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111363801] [2022-07-19 13:01:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:49,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:49,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111363801] [2022-07-19 13:01:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111363801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:49,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:49,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:49,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530266885] [2022-07-19 13:01:49,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:49,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:49,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:49,341 INFO L87 Difference]: Start difference. First operand 97090 states and 123723 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:50,093 INFO L93 Difference]: Finished difference Result 174054 states and 221151 transitions. [2022-07-19 13:01:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-19 13:01:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:50,369 INFO L225 Difference]: With dead ends: 174054 [2022-07-19 13:01:50,369 INFO L226 Difference]: Without dead ends: 174051 [2022-07-19 13:01:50,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:50,400 INFO L413 NwaCegarLoop]: 1036 mSDtfsCounter, 527 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:50,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1576 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:01:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174051 states. [2022-07-19 13:01:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174051 to 173830. [2022-07-19 13:01:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173830 states, 173730 states have (on average 1.269723133598112) internal successors, (220589), 173827 states have internal predecessors, (220589), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173830 states to 173830 states and 220687 transitions. [2022-07-19 13:01:52,545 INFO L78 Accepts]: Start accepts. Automaton has 173830 states and 220687 transitions. Word has length 45 [2022-07-19 13:01:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:52,545 INFO L495 AbstractCegarLoop]: Abstraction has 173830 states and 220687 transitions. [2022-07-19 13:01:52,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 173830 states and 220687 transitions. [2022-07-19 13:01:52,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 13:01:52,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:52,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:52,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 13:01:52,546 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:52,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1976305641, now seen corresponding path program 1 times [2022-07-19 13:01:52,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:52,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043254206] [2022-07-19 13:01:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:52,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:52,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:52,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043254206] [2022-07-19 13:01:52,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043254206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:52,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:52,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141347682] [2022-07-19 13:01:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 13:01:52,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:52,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 13:01:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:01:52,580 INFO L87 Difference]: Start difference. First operand 173830 states and 220687 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:54,564 INFO L93 Difference]: Finished difference Result 454683 states and 576582 transitions. [2022-07-19 13:01:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 13:01:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-19 13:01:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:54,950 INFO L225 Difference]: With dead ends: 454683 [2022-07-19 13:01:54,950 INFO L226 Difference]: Without dead ends: 280855 [2022-07-19 13:01:55,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:01:55,008 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 695 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:55,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 725 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 13:01:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280855 states. [2022-07-19 13:01:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280855 to 173825. [2022-07-19 13:01:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173825 states, 173730 states have (on average 1.2597075922408334) internal successors, (218849), 173822 states have internal predecessors, (218849), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173825 states to 173825 states and 218942 transitions. [2022-07-19 13:01:57,501 INFO L78 Accepts]: Start accepts. Automaton has 173825 states and 218942 transitions. Word has length 48 [2022-07-19 13:01:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:01:57,502 INFO L495 AbstractCegarLoop]: Abstraction has 173825 states and 218942 transitions. [2022-07-19 13:01:57,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 173825 states and 218942 transitions. [2022-07-19 13:01:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 13:01:57,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:01:57,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:01:57,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 13:01:57,503 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:01:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:01:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash 951319779, now seen corresponding path program 1 times [2022-07-19 13:01:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:01:57,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248300274] [2022-07-19 13:01:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:01:57,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:01:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:01:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:01:57,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:01:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248300274] [2022-07-19 13:01:57,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248300274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:01:57,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:01:57,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:01:57,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830986441] [2022-07-19 13:01:57,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:01:57,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:01:57,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:01:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:01:57,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:57,533 INFO L87 Difference]: Start difference. First operand 173825 states and 218942 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:01:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:01:59,142 INFO L93 Difference]: Finished difference Result 343392 states and 432799 transitions. [2022-07-19 13:01:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:01:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-19 13:01:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:01:59,377 INFO L225 Difference]: With dead ends: 343392 [2022-07-19 13:01:59,377 INFO L226 Difference]: Without dead ends: 169569 [2022-07-19 13:01:59,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:01:59,460 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 389 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 13:01:59,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 361 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 13:01:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169569 states. [2022-07-19 13:02:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169569 to 89809. [2022-07-19 13:02:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89809 states, 89714 states have (on average 1.2017299418151013) internal successors, (107812), 89806 states have internal predecessors, (107812), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89809 states to 89809 states and 107905 transitions. [2022-07-19 13:02:01,198 INFO L78 Accepts]: Start accepts. Automaton has 89809 states and 107905 transitions. Word has length 58 [2022-07-19 13:02:01,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:02:01,198 INFO L495 AbstractCegarLoop]: Abstraction has 89809 states and 107905 transitions. [2022-07-19 13:02:01,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 89809 states and 107905 transitions. [2022-07-19 13:02:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 13:02:01,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:02:01,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:02:01,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 13:02:01,200 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:02:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:02:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1754865588, now seen corresponding path program 1 times [2022-07-19 13:02:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:02:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945182075] [2022-07-19 13:02:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:02:01,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:02:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:02:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:02:01,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:02:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945182075] [2022-07-19 13:02:01,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945182075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:02:01,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:02:01,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:02:01,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997916199] [2022-07-19 13:02:01,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:02:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:02:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:02:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:02:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:02:01,229 INFO L87 Difference]: Start difference. First operand 89809 states and 107905 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:02:01,608 INFO L93 Difference]: Finished difference Result 128298 states and 153371 transitions. [2022-07-19 13:02:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:02:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-19 13:02:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:02:01,781 INFO L225 Difference]: With dead ends: 128298 [2022-07-19 13:02:01,781 INFO L226 Difference]: Without dead ends: 128293 [2022-07-19 13:02:01,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:02:01,820 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 445 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:02:01,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1264 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:02:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128293 states. [2022-07-19 13:02:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128293 to 128079. [2022-07-19 13:02:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128079 states, 127984 states have (on average 1.1906722715339417) internal successors, (152387), 128076 states have internal predecessors, (152387), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128079 states to 128079 states and 152480 transitions. [2022-07-19 13:02:03,599 INFO L78 Accepts]: Start accepts. Automaton has 128079 states and 152480 transitions. Word has length 113 [2022-07-19 13:02:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:02:03,599 INFO L495 AbstractCegarLoop]: Abstraction has 128079 states and 152480 transitions. [2022-07-19 13:02:03,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 128079 states and 152480 transitions. [2022-07-19 13:02:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-19 13:02:03,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:02:03,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:02:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 13:02:03,602 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:02:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:02:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash 149557454, now seen corresponding path program 1 times [2022-07-19 13:02:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:02:03,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807953920] [2022-07-19 13:02:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:02:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:02:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:02:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 13:02:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:02:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807953920] [2022-07-19 13:02:03,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807953920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:02:03,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:02:03,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:02:03,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464214757] [2022-07-19 13:02:03,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:02:03,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:02:03,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:02:03,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:02:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:02:03,635 INFO L87 Difference]: Start difference. First operand 128079 states and 152480 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:02:04,888 INFO L93 Difference]: Finished difference Result 275491 states and 332198 transitions. [2022-07-19 13:02:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:02:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-19 13:02:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:02:05,077 INFO L225 Difference]: With dead ends: 275491 [2022-07-19 13:02:05,077 INFO L226 Difference]: Without dead ends: 147535 [2022-07-19 13:02:05,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:02:05,122 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 323 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 13:02:05,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 518 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 13:02:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147535 states. [2022-07-19 13:02:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147535 to 147227. [2022-07-19 13:02:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147227 states, 147132 states have (on average 1.1926773237636952) internal successors, (175481), 147224 states have internal predecessors, (175481), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147227 states to 147227 states and 175574 transitions. [2022-07-19 13:02:07,036 INFO L78 Accepts]: Start accepts. Automaton has 147227 states and 175574 transitions. Word has length 144 [2022-07-19 13:02:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:02:07,037 INFO L495 AbstractCegarLoop]: Abstraction has 147227 states and 175574 transitions. [2022-07-19 13:02:07,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 147227 states and 175574 transitions. [2022-07-19 13:02:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-19 13:02:07,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:02:07,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:02:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 13:02:07,039 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:02:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:02:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1572407842, now seen corresponding path program 1 times [2022-07-19 13:02:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:02:07,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768230602] [2022-07-19 13:02:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:02:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:02:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:02:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 13:02:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:02:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768230602] [2022-07-19 13:02:07,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768230602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:02:07,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:02:07,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:02:07,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52207516] [2022-07-19 13:02:07,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:02:07,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:02:07,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:02:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:02:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:02:07,089 INFO L87 Difference]: Start difference. First operand 147227 states and 175574 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:02:08,731 INFO L93 Difference]: Finished difference Result 424126 states and 506087 transitions. [2022-07-19 13:02:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:02:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-07-19 13:02:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:02:09,113 INFO L225 Difference]: With dead ends: 424126 [2022-07-19 13:02:09,113 INFO L226 Difference]: Without dead ends: 277022 [2022-07-19 13:02:09,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:02:09,168 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 513 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 13:02:09,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 916 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 13:02:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277022 states. [2022-07-19 13:02:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277022 to 276834. [2022-07-19 13:02:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276834 states, 276739 states have (on average 1.1910030750996425) internal successors, (329597), 276831 states have internal predecessors, (329597), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276834 states to 276834 states and 329690 transitions. [2022-07-19 13:02:12,618 INFO L78 Accepts]: Start accepts. Automaton has 276834 states and 329690 transitions. Word has length 146 [2022-07-19 13:02:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:02:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 276834 states and 329690 transitions. [2022-07-19 13:02:12,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 276834 states and 329690 transitions. [2022-07-19 13:02:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-19 13:02:12,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:02:12,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:02:12,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 13:02:12,621 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:02:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:02:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash -768181585, now seen corresponding path program 1 times [2022-07-19 13:02:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:02:12,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919492418] [2022-07-19 13:02:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:02:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:02:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:02:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:02:12,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:02:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919492418] [2022-07-19 13:02:12,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919492418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:02:12,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:02:12,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 13:02:12,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186763267] [2022-07-19 13:02:12,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:02:12,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 13:02:12,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:02:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 13:02:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:02:12,662 INFO L87 Difference]: Start difference. First operand 276834 states and 329690 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 13:02:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:02:15,747 INFO L93 Difference]: Finished difference Result 750098 states and 891970 transitions. [2022-07-19 13:02:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 13:02:15,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-07-19 13:02:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:02:16,992 INFO L225 Difference]: With dead ends: 750098 [2022-07-19 13:02:16,992 INFO L226 Difference]: Without dead ends: 553201 [2022-07-19 13:02:17,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 13:02:17,068 INFO L413 NwaCegarLoop]: 966 mSDtfsCounter, 568 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 13:02:17,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1818 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 13:02:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553201 states.