./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label30.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-rers2012/Problem12_label30.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 0e208708a27329bc1b7bf267e92e92da86b44f6d40f860b2d7ec34e4892651a8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:47:21,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:47:21,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:47:21,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:47:21,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:47:21,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:47:21,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:47:21,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:47:21,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:47:21,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:47:21,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:47:21,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:47:21,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:47:21,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:47:21,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:47:21,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:47:21,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:47:21,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:47:21,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:47:21,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:47:21,957 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:47:21,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:47:21,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:47:21,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:47:21,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:47:21,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:47:21,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:47:21,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:47:21,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:47:21,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:47:21,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:47:21,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:47:21,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:47:21,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:47:21,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:47:21,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:47:21,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:47:21,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:47:21,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:47:21,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:47:21,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:47:21,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:47:21,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:47:22,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:47:22,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:47:22,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:47:22,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:47:22,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:47:22,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:47:22,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:47:22,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:47:22,003 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:47:22,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:47:22,004 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:47:22,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:47:22,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:47:22,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:47:22,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:47:22,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:47:22,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:47:22,005 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:47:22,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:47:22,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:47:22,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:47:22,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:47:22,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:47:22,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:47:22,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:47:22,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:47:22,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:47:22,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:47:22,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:47:22,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:47:22,007 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:47:22,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:47:22,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:47:22,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e208708a27329bc1b7bf267e92e92da86b44f6d40f860b2d7ec34e4892651a8 [2022-07-20 23:47:22,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:47:22,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:47:22,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:47:22,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:47:22,266 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:47:22,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2022-07-20 23:47:22,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa3816514/7d36840e1fe64d7a86c2440281a92594/FLAG08372d5ee [2022-07-20 23:47:22,875 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:47:22,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2022-07-20 23:47:22,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa3816514/7d36840e1fe64d7a86c2440281a92594/FLAG08372d5ee [2022-07-20 23:47:23,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa3816514/7d36840e1fe64d7a86c2440281a92594 [2022-07-20 23:47:23,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:47:23,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:47:23,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:47:23,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:47:23,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:47:23,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:23" (1/1) ... [2022-07-20 23:47:23,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c208541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:23, skipping insertion in model container [2022-07-20 23:47:23,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:23" (1/1) ... [2022-07-20 23:47:23,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:47:23,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:47:23,637 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-rers2012/Problem12_label30.c[3429,3442] [2022-07-20 23:47:24,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:47:24,259 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:47:24,280 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-rers2012/Problem12_label30.c[3429,3442] [2022-07-20 23:47:24,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:47:24,654 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:47:24,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24 WrapperNode [2022-07-20 23:47:24,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:47:24,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:47:24,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:47:24,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:47:24,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:24,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:24,962 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-20 23:47:24,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:47:24,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:47:24,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:47:24,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:47:24,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:24,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:25,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:25,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:25,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:25,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:25,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:25,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:47:25,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:47:25,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:47:25,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:47:25,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (1/1) ... [2022-07-20 23:47:25,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:47:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:47:25,408 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) [2022-07-20 23:47:25,429 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 [2022-07-20 23:47:25,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:47:25,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:47:25,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:47:25,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:47:25,489 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:47:25,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:47:28,269 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:47:28,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:47:28,280 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:47:28,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:28 BoogieIcfgContainer [2022-07-20 23:47:28,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:47:28,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:47:28,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:47:28,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:47:28,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:23" (1/3) ... [2022-07-20 23:47:28,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6d7b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:28, skipping insertion in model container [2022-07-20 23:47:28,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:24" (2/3) ... [2022-07-20 23:47:28,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6d7b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:28, skipping insertion in model container [2022-07-20 23:47:28,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:28" (3/3) ... [2022-07-20 23:47:28,287 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2022-07-20 23:47:28,296 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:47:28,297 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:47:28,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:47:28,343 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@ef65c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42006435 [2022-07-20 23:47:28,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:47:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 23:47:28,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:28,353 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] [2022-07-20 23:47:28,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:28,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2022-07-20 23:47:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:28,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833469253] [2022-07-20 23:47:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:28,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:47:28,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:28,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833469253] [2022-07-20 23:47:28,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833469253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:28,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:28,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:47:28,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342475941] [2022-07-20 23:47:28,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:47:28,520 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:31,705 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2022-07-20 23:47:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:31,707 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 23:47:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:31,725 INFO L225 Difference]: With dead ends: 2404 [2022-07-20 23:47:31,725 INFO L226 Difference]: Without dead ends: 1506 [2022-07-20 23:47:31,730 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 [2022-07-20 23:47:31,732 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 795 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:31,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:47:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-20 23:47:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-20 23:47:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2022-07-20 23:47:31,816 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 25 [2022-07-20 23:47:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:31,817 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2022-07-20 23:47:31,817 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2022-07-20 23:47:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-20 23:47:31,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:31,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:47:31,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:47:31,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash 778936309, now seen corresponding path program 1 times [2022-07-20 23:47:31,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:31,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961212920] [2022-07-20 23:47:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:31,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:47:31,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961212920] [2022-07-20 23:47:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961212920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:31,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:31,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:47:31,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137466488] [2022-07-20 23:47:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:31,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:31,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:47:31,943 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:34,404 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2022-07-20 23:47:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-07-20 23:47:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:34,413 INFO L225 Difference]: With dead ends: 4512 [2022-07-20 23:47:34,413 INFO L226 Difference]: Without dead ends: 3008 [2022-07-20 23:47:34,415 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 [2022-07-20 23:47:34,416 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:34,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 449 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:47:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-07-20 23:47:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2022-07-20 23:47:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4156967076820752) internal successors, (4257), 3007 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2022-07-20 23:47:34,456 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 100 [2022-07-20 23:47:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:34,457 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2022-07-20 23:47:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2022-07-20 23:47:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-20 23:47:34,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:34,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:47:34,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:47:34,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash 601923994, now seen corresponding path program 1 times [2022-07-20 23:47:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:34,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840982581] [2022-07-20 23:47:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:47:34,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:34,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840982581] [2022-07-20 23:47:34,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840982581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:34,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:34,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:47:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664166616] [2022-07-20 23:47:34,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:47:34,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:34,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:47:34,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:47:34,606 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:38,306 INFO L93 Difference]: Finished difference Result 9769 states and 13601 transitions. [2022-07-20 23:47:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:47:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-20 23:47:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:38,327 INFO L225 Difference]: With dead ends: 9769 [2022-07-20 23:47:38,327 INFO L226 Difference]: Without dead ends: 6763 [2022-07-20 23:47:38,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:47:38,333 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 2182 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:38,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2182 Valid, 164 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-20 23:47:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-07-20 23:47:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-07-20 23:47:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3510795622596865) internal successors, (9136), 6762 states have internal predecessors, (9136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9136 transitions. [2022-07-20 23:47:38,446 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9136 transitions. Word has length 102 [2022-07-20 23:47:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:38,447 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 9136 transitions. [2022-07-20 23:47:38,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9136 transitions. [2022-07-20 23:47:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-20 23:47:38,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:38,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:47:38,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:47:38,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash -888170950, now seen corresponding path program 1 times [2022-07-20 23:47:38,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:38,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914090570] [2022-07-20 23:47:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:47:38,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:38,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914090570] [2022-07-20 23:47:38,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914090570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:47:38,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815446453] [2022-07-20 23:47:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:38,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:47:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:47:38,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:47:38,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:47:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:47:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:47:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 23:47:38,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:47:38,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815446453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:38,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:47:38,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 23:47:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751039379] [2022-07-20 23:47:38,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:38,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:38,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:47:38,973 INFO L87 Difference]: Start difference. First operand 6763 states and 9136 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:41,302 INFO L93 Difference]: Finished difference Result 15777 states and 21149 transitions. [2022-07-20 23:47:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-07-20 23:47:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:41,354 INFO L225 Difference]: With dead ends: 15777 [2022-07-20 23:47:41,355 INFO L226 Difference]: Without dead ends: 9767 [2022-07-20 23:47:41,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:47:41,379 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 716 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:41,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 156 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:47:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-07-20 23:47:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-07-20 23:47:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.255785377841491) internal successors, (12264), 9766 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12264 transitions. [2022-07-20 23:47:41,563 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12264 transitions. Word has length 166 [2022-07-20 23:47:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:41,564 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12264 transitions. [2022-07-20 23:47:41,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12264 transitions. [2022-07-20 23:47:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-20 23:47:41,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:41,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:47:41,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:47:41,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:47:41,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash -764569624, now seen corresponding path program 1 times [2022-07-20 23:47:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:41,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146729568] [2022-07-20 23:47:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:47:41,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:41,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146729568] [2022-07-20 23:47:41,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146729568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:41,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:41,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:47:41,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443430342] [2022-07-20 23:47:41,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:41,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:47:41,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:47:41,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:47:41,856 INFO L87 Difference]: Start difference. First operand 9767 states and 12264 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:44,252 INFO L93 Difference]: Finished difference Result 21822 states and 27290 transitions. [2022-07-20 23:47:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:47:44,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-07-20 23:47:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:44,290 INFO L225 Difference]: With dead ends: 21822 [2022-07-20 23:47:44,290 INFO L226 Difference]: Without dead ends: 12771 [2022-07-20 23:47:44,303 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 [2022-07-20 23:47:44,304 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:44,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 612 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:47:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2022-07-20 23:47:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 12020. [2022-07-20 23:47:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2022-07-20 23:47:44,441 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 173 [2022-07-20 23:47:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:44,441 INFO L495 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2022-07-20 23:47:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2022-07-20 23:47:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-20 23:47:44,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:44,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:47:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 23:47:44,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 289070346, now seen corresponding path program 1 times [2022-07-20 23:47:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:44,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961618325] [2022-07-20 23:47:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-20 23:47:44,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:44,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961618325] [2022-07-20 23:47:44,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961618325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:44,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:44,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:47:44,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330449314] [2022-07-20 23:47:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:44,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:44,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:47:44,548 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:47,166 INFO L93 Difference]: Finished difference Result 27793 states and 34552 transitions. [2022-07-20 23:47:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-07-20 23:47:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:47,239 INFO L225 Difference]: With dead ends: 27793 [2022-07-20 23:47:47,239 INFO L226 Difference]: Without dead ends: 16526 [2022-07-20 23:47:47,249 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 [2022-07-20 23:47:47,264 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 761 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:47,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 495 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:47:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2022-07-20 23:47:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 12020. [2022-07-20 23:47:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2022-07-20 23:47:47,422 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 237 [2022-07-20 23:47:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:47,422 INFO L495 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2022-07-20 23:47:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2022-07-20 23:47:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-20 23:47:47,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:47,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:47:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:47:47,425 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash 478547313, now seen corresponding path program 1 times [2022-07-20 23:47:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:47,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169136962] [2022-07-20 23:47:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-20 23:47:47,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:47,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169136962] [2022-07-20 23:47:47,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169136962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:47,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:47,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:47:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397090] [2022-07-20 23:47:47,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:47,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:47:47,499 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:49,858 INFO L93 Difference]: Finished difference Result 31550 states and 38845 transitions. [2022-07-20 23:47:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2022-07-20 23:47:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:49,909 INFO L225 Difference]: With dead ends: 31550 [2022-07-20 23:47:49,910 INFO L226 Difference]: Without dead ends: 20283 [2022-07-20 23:47:49,918 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 [2022-07-20 23:47:49,919 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:49,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:47:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2022-07-20 23:47:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 18779. [2022-07-20 23:47:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.1888380019171372) internal successors, (22324), 18778 states have internal predecessors, (22324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 22324 transitions. [2022-07-20 23:47:50,142 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 22324 transitions. Word has length 238 [2022-07-20 23:47:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:50,142 INFO L495 AbstractCegarLoop]: Abstraction has 18779 states and 22324 transitions. [2022-07-20 23:47:50,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 22324 transitions. [2022-07-20 23:47:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-20 23:47:50,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:50,147 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:47:50,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:47:50,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1542873532, now seen corresponding path program 1 times [2022-07-20 23:47:50,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573643967] [2022-07-20 23:47:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 23:47:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:50,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573643967] [2022-07-20 23:47:50,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573643967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:50,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:50,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:47:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426620025] [2022-07-20 23:47:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:47:50,256 INFO L87 Difference]: Start difference. First operand 18779 states and 22324 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:52,411 INFO L93 Difference]: Finished difference Result 43564 states and 53013 transitions. [2022-07-20 23:47:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:52,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2022-07-20 23:47:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:52,441 INFO L225 Difference]: With dead ends: 43564 [2022-07-20 23:47:52,442 INFO L226 Difference]: Without dead ends: 25538 [2022-07-20 23:47:52,459 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 [2022-07-20 23:47:52,460 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:52,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:47:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25538 states. [2022-07-20 23:47:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25538 to 24036. [2022-07-20 23:47:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 1.1785313085084252) internal successors, (28326), 24035 states have internal predecessors, (28326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 28326 transitions. [2022-07-20 23:47:52,829 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 28326 transitions. Word has length 324 [2022-07-20 23:47:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:52,830 INFO L495 AbstractCegarLoop]: Abstraction has 24036 states and 28326 transitions. [2022-07-20 23:47:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 28326 transitions. [2022-07-20 23:47:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-07-20 23:47:52,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:52,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:47:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:47:52,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:52,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1226856098, now seen corresponding path program 1 times [2022-07-20 23:47:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:52,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455253509] [2022-07-20 23:47:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:52,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 23:47:52,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:52,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455253509] [2022-07-20 23:47:52,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455253509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:52,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:52,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:47:52,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457480250] [2022-07-20 23:47:52,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:52,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:52,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:47:52,952 INFO L87 Difference]: Start difference. First operand 24036 states and 28326 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:55,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:55,335 INFO L93 Difference]: Finished difference Result 60837 states and 71503 transitions. [2022-07-20 23:47:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:55,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 352 [2022-07-20 23:47:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:55,378 INFO L225 Difference]: With dead ends: 60837 [2022-07-20 23:47:55,378 INFO L226 Difference]: Without dead ends: 37554 [2022-07-20 23:47:55,401 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 [2022-07-20 23:47:55,402 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:55,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1247 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:47:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2022-07-20 23:47:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 35301. [2022-07-20 23:47:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35301 states, 35300 states have (on average 1.1668555240793201) internal successors, (41190), 35300 states have internal predecessors, (41190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 41190 transitions. [2022-07-20 23:47:55,987 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 41190 transitions. Word has length 352 [2022-07-20 23:47:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:47:55,987 INFO L495 AbstractCegarLoop]: Abstraction has 35301 states and 41190 transitions. [2022-07-20 23:47:55,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 41190 transitions. [2022-07-20 23:47:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-07-20 23:47:55,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:47:55,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:47:55,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 23:47:55,992 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:47:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:47:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -733385364, now seen corresponding path program 1 times [2022-07-20 23:47:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:47:55,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437768544] [2022-07-20 23:47:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:47:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:47:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:47:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-20 23:47:56,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:47:56,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437768544] [2022-07-20 23:47:56,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437768544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:47:56,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:47:56,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:47:56,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323803498] [2022-07-20 23:47:56,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:47:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:47:56,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:47:56,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:47:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:47:56,230 INFO L87 Difference]: Start difference. First operand 35301 states and 41190 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:47:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:47:59,205 INFO L93 Difference]: Finished difference Result 102893 states and 120518 transitions. [2022-07-20 23:47:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:47:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2022-07-20 23:47:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:47:59,301 INFO L225 Difference]: With dead ends: 102893 [2022-07-20 23:47:59,302 INFO L226 Difference]: Without dead ends: 63839 [2022-07-20 23:47:59,425 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 [2022-07-20 23:47:59,426 INFO L413 NwaCegarLoop]: 1307 mSDtfsCounter, 768 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:47:59,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1315 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:47:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63839 states. [2022-07-20 23:48:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63839 to 53325. [2022-07-20 23:48:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53325 states, 53324 states have (on average 1.1311416997974646) internal successors, (60317), 53324 states have internal predecessors, (60317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53325 states to 53325 states and 60317 transitions. [2022-07-20 23:48:00,148 INFO L78 Accepts]: Start accepts. Automaton has 53325 states and 60317 transitions. Word has length 356 [2022-07-20 23:48:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:00,149 INFO L495 AbstractCegarLoop]: Abstraction has 53325 states and 60317 transitions. [2022-07-20 23:48:00,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53325 states and 60317 transitions. [2022-07-20 23:48:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-07-20 23:48:00,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:00,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:48:00,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:48:00,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1665703124, now seen corresponding path program 1 times [2022-07-20 23:48:00,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:00,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459108446] [2022-07-20 23:48:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:00,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 23:48:00,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459108446] [2022-07-20 23:48:00,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459108446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:00,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:48:00,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:48:00,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978979587] [2022-07-20 23:48:00,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:00,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:48:00,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:48:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:48:00,330 INFO L87 Difference]: Start difference. First operand 53325 states and 60317 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:03,168 INFO L93 Difference]: Finished difference Result 135186 states and 154639 transitions. [2022-07-20 23:48:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:48:03,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 363 [2022-07-20 23:48:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:03,277 INFO L225 Difference]: With dead ends: 135186 [2022-07-20 23:48:03,278 INFO L226 Difference]: Without dead ends: 82614 [2022-07-20 23:48:03,309 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 [2022-07-20 23:48:03,310 INFO L413 NwaCegarLoop]: 1228 mSDtfsCounter, 720 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:03,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 1236 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:48:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82614 states. [2022-07-20 23:48:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82614 to 76606. [2022-07-20 23:48:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76606 states, 76605 states have (on average 1.1163762156517198) internal successors, (85520), 76605 states have internal predecessors, (85520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76606 states to 76606 states and 85520 transitions. [2022-07-20 23:48:04,453 INFO L78 Accepts]: Start accepts. Automaton has 76606 states and 85520 transitions. Word has length 363 [2022-07-20 23:48:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:04,454 INFO L495 AbstractCegarLoop]: Abstraction has 76606 states and 85520 transitions. [2022-07-20 23:48:04,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:04,454 INFO L276 IsEmpty]: Start isEmpty. Operand 76606 states and 85520 transitions. [2022-07-20 23:48:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-07-20 23:48:04,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:04,463 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:48:04,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 23:48:04,464 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1722659600, now seen corresponding path program 1 times [2022-07-20 23:48:04,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:04,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182216833] [2022-07-20 23:48:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:04,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-20 23:48:04,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:04,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182216833] [2022-07-20 23:48:04,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182216833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:04,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:48:04,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:48:04,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744206644] [2022-07-20 23:48:04,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:04,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:48:04,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:48:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:48:04,648 INFO L87 Difference]: Start difference. First operand 76606 states and 85520 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:07,561 INFO L93 Difference]: Finished difference Result 187005 states and 210407 transitions. [2022-07-20 23:48:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:48:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 460 [2022-07-20 23:48:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:07,702 INFO L225 Difference]: With dead ends: 187005 [2022-07-20 23:48:07,702 INFO L226 Difference]: Without dead ends: 111152 [2022-07-20 23:48:07,748 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 [2022-07-20 23:48:07,751 INFO L413 NwaCegarLoop]: 1288 mSDtfsCounter, 741 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:07,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1296 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:48:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111152 states. [2022-07-20 23:48:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111152 to 99136. [2022-07-20 23:48:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99136 states, 99135 states have (on average 1.1063095778483885) internal successors, (109674), 99135 states have internal predecessors, (109674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99136 states to 99136 states and 109674 transitions. [2022-07-20 23:48:09,274 INFO L78 Accepts]: Start accepts. Automaton has 99136 states and 109674 transitions. Word has length 460 [2022-07-20 23:48:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:09,275 INFO L495 AbstractCegarLoop]: Abstraction has 99136 states and 109674 transitions. [2022-07-20 23:48:09,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 99136 states and 109674 transitions. [2022-07-20 23:48:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-07-20 23:48:09,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:09,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:48:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 23:48:09,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1800625400, now seen corresponding path program 1 times [2022-07-20 23:48:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178883453] [2022-07-20 23:48:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-07-20 23:48:09,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178883453] [2022-07-20 23:48:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178883453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:09,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:48:09,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:48:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195228873] [2022-07-20 23:48:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:09,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:48:09,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:48:09,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:48:09,692 INFO L87 Difference]: Start difference. First operand 99136 states and 109674 transitions. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:12,733 INFO L93 Difference]: Finished difference Result 222302 states and 248518 transitions. [2022-07-20 23:48:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:48:12,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 735 [2022-07-20 23:48:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:12,876 INFO L225 Difference]: With dead ends: 222302 [2022-07-20 23:48:12,877 INFO L226 Difference]: Without dead ends: 123919 [2022-07-20 23:48:12,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:48:12,911 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 748 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 891 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:12,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 297 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [891 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 23:48:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123919 states. [2022-07-20 23:48:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123919 to 123168. [2022-07-20 23:48:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123168 states, 123167 states have (on average 1.1150714071139185) internal successors, (137340), 123167 states have internal predecessors, (137340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123168 states to 123168 states and 137340 transitions. [2022-07-20 23:48:14,483 INFO L78 Accepts]: Start accepts. Automaton has 123168 states and 137340 transitions. Word has length 735 [2022-07-20 23:48:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:14,484 INFO L495 AbstractCegarLoop]: Abstraction has 123168 states and 137340 transitions. [2022-07-20 23:48:14,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 123168 states and 137340 transitions. [2022-07-20 23:48:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2022-07-20 23:48:14,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:14,515 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:48:14,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 23:48:14,515 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1748883327, now seen corresponding path program 1 times [2022-07-20 23:48:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:14,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776575818] [2022-07-20 23:48:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 640 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 23:48:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776575818] [2022-07-20 23:48:14,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776575818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:14,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:48:14,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:48:14,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839613020] [2022-07-20 23:48:14,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:48:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:48:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:48:14,966 INFO L87 Difference]: Start difference. First operand 123168 states and 137340 transitions. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:18,231 INFO L93 Difference]: Finished difference Result 245583 states and 273922 transitions. [2022-07-20 23:48:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:48:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 754 [2022-07-20 23:48:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:18,396 INFO L225 Difference]: With dead ends: 245583 [2022-07-20 23:48:18,396 INFO L226 Difference]: Without dead ends: 123168 [2022-07-20 23:48:18,443 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 [2022-07-20 23:48:18,444 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 405 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:18,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1270 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:48:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123168 states. [2022-07-20 23:48:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123168 to 120915. [2022-07-20 23:48:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120915 states, 120914 states have (on average 1.0836048761929966) internal successors, (131023), 120914 states have internal predecessors, (131023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120915 states to 120915 states and 131023 transitions. [2022-07-20 23:48:19,973 INFO L78 Accepts]: Start accepts. Automaton has 120915 states and 131023 transitions. Word has length 754 [2022-07-20 23:48:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:19,973 INFO L495 AbstractCegarLoop]: Abstraction has 120915 states and 131023 transitions. [2022-07-20 23:48:19,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 120915 states and 131023 transitions. [2022-07-20 23:48:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2022-07-20 23:48:20,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:20,001 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:48:20,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 23:48:20,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1039376707, now seen corresponding path program 1 times [2022-07-20 23:48:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:20,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818154147] [2022-07-20 23:48:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:20,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 655 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-20 23:48:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:20,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818154147] [2022-07-20 23:48:20,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818154147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:20,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:48:20,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:48:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026716774] [2022-07-20 23:48:20,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:20,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:48:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:48:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:48:20,548 INFO L87 Difference]: Start difference. First operand 120915 states and 131023 transitions. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:23,813 INFO L93 Difference]: Finished difference Result 255346 states and 275996 transitions. [2022-07-20 23:48:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:48:23,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 769 [2022-07-20 23:48:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:23,992 INFO L225 Difference]: With dead ends: 255346 [2022-07-20 23:48:23,992 INFO L226 Difference]: Without dead ends: 135184 [2022-07-20 23:48:24,046 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 [2022-07-20 23:48:24,046 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 449 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:24,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 202 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:48:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135184 states. [2022-07-20 23:48:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135184 to 123168. [2022-07-20 23:48:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123168 states, 123167 states have (on average 1.0769524304399718) internal successors, (132645), 123167 states have internal predecessors, (132645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123168 states to 123168 states and 132645 transitions. [2022-07-20 23:48:25,940 INFO L78 Accepts]: Start accepts. Automaton has 123168 states and 132645 transitions. Word has length 769 [2022-07-20 23:48:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:25,940 INFO L495 AbstractCegarLoop]: Abstraction has 123168 states and 132645 transitions. [2022-07-20 23:48:25,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 123168 states and 132645 transitions. [2022-07-20 23:48:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2022-07-20 23:48:25,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:25,968 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:48:25,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 23:48:25,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash -404829369, now seen corresponding path program 1 times [2022-07-20 23:48:25,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:25,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163312484] [2022-07-20 23:48:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:25,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 445 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:48:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163312484] [2022-07-20 23:48:26,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163312484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:26,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:48:26,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 23:48:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569994074] [2022-07-20 23:48:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:26,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 23:48:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 23:48:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:48:26,644 INFO L87 Difference]: Start difference. First operand 123168 states and 132645 transitions. Second operand has 8 states, 8 states have (on average 96.125) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:36,490 INFO L93 Difference]: Finished difference Result 301885 states and 324235 transitions. [2022-07-20 23:48:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 23:48:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 96.125) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 769 [2022-07-20 23:48:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:36,709 INFO L225 Difference]: With dead ends: 301885 [2022-07-20 23:48:36,710 INFO L226 Difference]: Without dead ends: 179470 [2022-07-20 23:48:36,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-07-20 23:48:36,769 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 4714 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 14396 mSolverCounterSat, 1154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4714 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 15550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1154 IncrementalHoareTripleChecker+Valid, 14396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:36,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4714 Valid, 791 Invalid, 15550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1154 Valid, 14396 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-07-20 23:48:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179470 states. [2022-07-20 23:48:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179470 to 163781. [2022-07-20 23:48:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163781 states, 163780 states have (on average 1.0762852607155942) internal successors, (176274), 163780 states have internal predecessors, (176274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163781 states to 163781 states and 176274 transitions. [2022-07-20 23:48:39,322 INFO L78 Accepts]: Start accepts. Automaton has 163781 states and 176274 transitions. Word has length 769 [2022-07-20 23:48:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:39,323 INFO L495 AbstractCegarLoop]: Abstraction has 163781 states and 176274 transitions. [2022-07-20 23:48:39,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.125) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 163781 states and 176274 transitions. [2022-07-20 23:48:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2022-07-20 23:48:39,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:39,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:48:39,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 23:48:39,386 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1194585177, now seen corresponding path program 1 times [2022-07-20 23:48:39,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:39,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109816744] [2022-07-20 23:48:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:39,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 415 proven. 54 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 23:48:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:39,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109816744] [2022-07-20 23:48:39,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109816744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:48:39,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570606341] [2022-07-20 23:48:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:39,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:48:39,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:48:39,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:48:39,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:48:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:48:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:48:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-07-20 23:48:40,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:48:40,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570606341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:40,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:48:40,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-20 23:48:40,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408415567] [2022-07-20 23:48:40,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:40,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:48:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:48:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:48:40,741 INFO L87 Difference]: Start difference. First operand 163781 states and 176274 transitions. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:46,283 INFO L93 Difference]: Finished difference Result 493786 states and 532612 transitions. [2022-07-20 23:48:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:48:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 792 [2022-07-20 23:48:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:46,683 INFO L225 Difference]: With dead ends: 493786 [2022-07-20 23:48:46,683 INFO L226 Difference]: Without dead ends: 330758 [2022-07-20 23:48:46,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:48:46,765 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1477 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4743 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 5251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 4743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:46,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1477 Valid, 60 Invalid, 5251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 4743 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-20 23:48:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330758 states. [2022-07-20 23:48:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330758 to 328647. [2022-07-20 23:48:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328647 states, 328646 states have (on average 1.0763435429002635) internal successors, (353736), 328646 states have internal predecessors, (353736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328647 states to 328647 states and 353736 transitions. [2022-07-20 23:48:51,308 INFO L78 Accepts]: Start accepts. Automaton has 328647 states and 353736 transitions. Word has length 792 [2022-07-20 23:48:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:48:51,308 INFO L495 AbstractCegarLoop]: Abstraction has 328647 states and 353736 transitions. [2022-07-20 23:48:51,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 328647 states and 353736 transitions. [2022-07-20 23:48:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2022-07-20 23:48:51,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:48:51,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:48:51,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 23:48:51,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 23:48:51,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:48:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:48:51,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1089932043, now seen corresponding path program 1 times [2022-07-20 23:48:51,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:48:51,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615629138] [2022-07-20 23:48:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:48:51,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:48:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:48:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2022-07-20 23:48:51,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:48:51,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615629138] [2022-07-20 23:48:51,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615629138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:48:51,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:48:51,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:48:51,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511315998] [2022-07-20 23:48:51,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:48:51,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:48:51,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:48:51,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:48:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:48:51,899 INFO L87 Difference]: Start difference. First operand 328647 states and 353736 transitions. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:48:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:48:56,847 INFO L93 Difference]: Finished difference Result 711363 states and 764104 transitions. [2022-07-20 23:48:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:48:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 877 [2022-07-20 23:48:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:48:57,621 INFO L225 Difference]: With dead ends: 711363 [2022-07-20 23:48:57,621 INFO L226 Difference]: Without dead ends: 383469 [2022-07-20 23:48:57,842 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 [2022-07-20 23:48:57,842 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 678 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:48:57,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1186 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:48:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383469 states.