./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/Problem19_label48.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 306d76de7aaacb5c78b0c01822f757a2e7207e6c0d97a8439c3c177a2e4c44f4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:33:48,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:33:48,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:33:48,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:33:48,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:33:48,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:33:48,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:33:48,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:33:48,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:33:48,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:33:48,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:33:48,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:33:48,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:33:49,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:33:49,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:33:49,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:33:49,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:33:49,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:33:49,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:33:49,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:33:49,020 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:33:49,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:33:49,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:33:49,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:33:49,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:33:49,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:33:49,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:33:49,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:33:49,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:33:49,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:33:49,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:33:49,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:33:49,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:33:49,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:33:49,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:33:49,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:33:49,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:33:49,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:33:49,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:33:49,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:33:49,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:33:49,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:33:49,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:33:49,058 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:33:49,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:33:49,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:33:49,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:33:49,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:33:49,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:33:49,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:33:49,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:33:49,060 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:33:49,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:33:49,061 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:33:49,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:33:49,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:33:49,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:33:49,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:33:49,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:33:49,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:33:49,062 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:33:49,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:33:49,062 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:33:49,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:33:49,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:33:49,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:33:49,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:33:49,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:33:49,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:33:49,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:33:49,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:33:49,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:33:49,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:33:49,064 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:33:49,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:33:49,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:33:49,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d76de7aaacb5c78b0c01822f757a2e7207e6c0d97a8439c3c177a2e4c44f4 [2022-07-13 13:33:49,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:33:49,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:33:49,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:33:49,270 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:33:49,270 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:33:49,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label48.c [2022-07-13 13:33:49,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5141766/6132aa548c604bd4aaa8c4bb28cd75e0/FLAGb50ebd1cf [2022-07-13 13:33:50,008 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:33:50,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label48.c [2022-07-13 13:33:50,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5141766/6132aa548c604bd4aaa8c4bb28cd75e0/FLAGb50ebd1cf [2022-07-13 13:33:50,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5141766/6132aa548c604bd4aaa8c4bb28cd75e0 [2022-07-13 13:33:50,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:33:50,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:33:50,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:33:50,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:33:50,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:33:50,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:33:50" (1/1) ... [2022-07-13 13:33:50,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6c33f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:50, skipping insertion in model container [2022-07-13 13:33:50,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:33:50" (1/1) ... [2022-07-13 13:33:50,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:33:50,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:33:50,650 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/Problem19_label48.c[8401,8414] [2022-07-13 13:33:51,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:33:51,556 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:33:51,588 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/Problem19_label48.c[8401,8414] [2022-07-13 13:33:52,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:33:52,189 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:33:52,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52 WrapperNode [2022-07-13 13:33:52,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:33:52,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:33:52,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:33:52,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:33:52,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:52,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:52,820 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-07-13 13:33:52,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:33:52,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:33:52,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:33:52,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:33:52,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:52,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:53,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:53,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:53,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:53,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:53,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:53,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:33:53,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:33:53,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:33:53,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:33:53,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (1/1) ... [2022-07-13 13:33:53,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:33:53,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:33:53,660 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) [2022-07-13 13:33:53,661 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 [2022-07-13 13:33:53,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:33:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:33:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:33:53,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:33:53,749 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:33:53,750 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:33:59,330 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:33:59,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:33:59,350 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:33:59,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:33:59 BoogieIcfgContainer [2022-07-13 13:33:59,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:33:59,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:33:59,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:33:59,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:33:59,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:33:50" (1/3) ... [2022-07-13 13:33:59,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77765bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:33:59, skipping insertion in model container [2022-07-13 13:33:59,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:33:52" (2/3) ... [2022-07-13 13:33:59,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77765bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:33:59, skipping insertion in model container [2022-07-13 13:33:59,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:33:59" (3/3) ... [2022-07-13 13:33:59,361 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label48.c [2022-07-13 13:33:59,370 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:33:59,370 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:33:59,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:33:59,430 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@7e4abb77, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@54cefd3b [2022-07-13 13:33:59,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:33:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) [2022-07-13 13:33:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 13:33:59,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:33:59,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:33:59,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:33:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:33:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2022-07-13 13:33:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:33:59,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391864699] [2022-07-13 13:33:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:33:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:33:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:33:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:33:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:33:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391864699] [2022-07-13 13:33:59,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391864699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:33:59,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:33:59,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:33:59,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68196811] [2022-07-13 13:33:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:33:59,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:33:59,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:33:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:33:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:33:59,732 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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) [2022-07-13 13:34:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:05,859 INFO L93 Difference]: Finished difference Result 4975 states and 9416 transitions. [2022-07-13 13:34:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:34:05,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 65 [2022-07-13 13:34:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:05,890 INFO L225 Difference]: With dead ends: 4975 [2022-07-13 13:34:05,890 INFO L226 Difference]: Without dead ends: 3163 [2022-07-13 13:34:05,896 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 [2022-07-13 13:34:05,898 INFO L413 NwaCegarLoop]: 1353 mSDtfsCounter, 1481 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:05,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 1524 Invalid, 5793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-13 13:34:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-07-13 13:34:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3123. [2022-07-13 13:34:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.6268417680973735) internal successors, (5079), 3122 states have internal predecessors, (5079), 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) [2022-07-13 13:34:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5079 transitions. [2022-07-13 13:34:06,010 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5079 transitions. Word has length 65 [2022-07-13 13:34:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:06,014 INFO L495 AbstractCegarLoop]: Abstraction has 3123 states and 5079 transitions. [2022-07-13 13:34:06,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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) [2022-07-13 13:34:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5079 transitions. [2022-07-13 13:34:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-13 13:34:06,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:06,023 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, 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] [2022-07-13 13:34:06,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:34:06,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash 423424623, now seen corresponding path program 1 times [2022-07-13 13:34:06,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:06,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088183073] [2022-07-13 13:34:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:34:06,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088183073] [2022-07-13 13:34:06,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088183073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:06,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:34:06,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:34:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873831937] [2022-07-13 13:34:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:34:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:34:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:34:06,153 INFO L87 Difference]: Start difference. First operand 3123 states and 5079 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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) [2022-07-13 13:34:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:12,012 INFO L93 Difference]: Finished difference Result 9053 states and 14813 transitions. [2022-07-13 13:34:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:34:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 136 [2022-07-13 13:34:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:12,030 INFO L225 Difference]: With dead ends: 9053 [2022-07-13 13:34:12,031 INFO L226 Difference]: Without dead ends: 5932 [2022-07-13 13:34:12,038 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 [2022-07-13 13:34:12,040 INFO L413 NwaCegarLoop]: 1325 mSDtfsCounter, 1534 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 4265 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 4265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:12,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1534 Valid, 1544 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 4265 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-07-13 13:34:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2022-07-13 13:34:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5910. [2022-07-13 13:34:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5910 states, 5909 states have (on average 1.423421898798443) internal successors, (8411), 5909 states have internal predecessors, (8411), 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) [2022-07-13 13:34:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5910 states to 5910 states and 8411 transitions. [2022-07-13 13:34:12,132 INFO L78 Accepts]: Start accepts. Automaton has 5910 states and 8411 transitions. Word has length 136 [2022-07-13 13:34:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:12,135 INFO L495 AbstractCegarLoop]: Abstraction has 5910 states and 8411 transitions. [2022-07-13 13:34:12,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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) [2022-07-13 13:34:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states and 8411 transitions. [2022-07-13 13:34:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-13 13:34:12,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:12,139 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, 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] [2022-07-13 13:34:12,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:34:12,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1771491522, now seen corresponding path program 1 times [2022-07-13 13:34:12,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:12,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014744503] [2022-07-13 13:34:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:34:12,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014744503] [2022-07-13 13:34:12,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014744503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:12,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:34:12,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:34:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849753272] [2022-07-13 13:34:12,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:34:12,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:34:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:34:12,283 INFO L87 Difference]: Start difference. First operand 5910 states and 8411 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-07-13 13:34:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:17,711 INFO L93 Difference]: Finished difference Result 17505 states and 24942 transitions. [2022-07-13 13:34:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:34:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 162 [2022-07-13 13:34:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:17,746 INFO L225 Difference]: With dead ends: 17505 [2022-07-13 13:34:17,747 INFO L226 Difference]: Without dead ends: 11597 [2022-07-13 13:34:17,758 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 [2022-07-13 13:34:17,762 INFO L413 NwaCegarLoop]: 1533 mSDtfsCounter, 1750 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4227 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 5657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:17,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1750 Valid, 1806 Invalid, 5657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4227 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-13 13:34:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11597 states. [2022-07-13 13:34:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11597 to 11578. [2022-07-13 13:34:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.2801243845555843) internal successors, (14820), 11577 states have internal predecessors, (14820), 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) [2022-07-13 13:34:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 14820 transitions. [2022-07-13 13:34:17,930 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 14820 transitions. Word has length 162 [2022-07-13 13:34:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:17,943 INFO L495 AbstractCegarLoop]: Abstraction has 11578 states and 14820 transitions. [2022-07-13 13:34:17,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-07-13 13:34:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 14820 transitions. [2022-07-13 13:34:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-13 13:34:17,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:17,945 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, 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] [2022-07-13 13:34:17,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:34:17,946 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:17,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1943076142, now seen corresponding path program 1 times [2022-07-13 13:34:17,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:17,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674543] [2022-07-13 13:34:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:17,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:34:18,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:18,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674543] [2022-07-13 13:34:18,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:18,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:34:18,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:34:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431115708] [2022-07-13 13:34:18,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:18,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:34:18,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:34:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:34:18,067 INFO L87 Difference]: Start difference. First operand 11578 states and 14820 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 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) [2022-07-13 13:34:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:24,104 INFO L93 Difference]: Finished difference Result 34273 states and 43832 transitions. [2022-07-13 13:34:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:34:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 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 170 [2022-07-13 13:34:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:24,152 INFO L225 Difference]: With dead ends: 34273 [2022-07-13 13:34:24,152 INFO L226 Difference]: Without dead ends: 22697 [2022-07-13 13:34:24,165 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 [2022-07-13 13:34:24,171 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 2497 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:24,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2497 Valid, 995 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-07-13 13:34:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22697 states. [2022-07-13 13:34:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22697 to 22694. [2022-07-13 13:34:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 22693 states have (on average 1.238663905168995) internal successors, (28109), 22693 states have internal predecessors, (28109), 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) [2022-07-13 13:34:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 28109 transitions. [2022-07-13 13:34:24,457 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 28109 transitions. Word has length 170 [2022-07-13 13:34:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:24,458 INFO L495 AbstractCegarLoop]: Abstraction has 22694 states and 28109 transitions. [2022-07-13 13:34:24,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 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) [2022-07-13 13:34:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 28109 transitions. [2022-07-13 13:34:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-07-13 13:34:24,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:24,463 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:34:24,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:34:24,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash -616216985, now seen corresponding path program 1 times [2022-07-13 13:34:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:24,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756889162] [2022-07-13 13:34:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:24,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-13 13:34:24,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:24,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756889162] [2022-07-13 13:34:24,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756889162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:24,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:34:24,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:34:24,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385856624] [2022-07-13 13:34:24,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:24,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:34:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:34:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:34:24,680 INFO L87 Difference]: Start difference. First operand 22694 states and 28109 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 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) [2022-07-13 13:34:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:32,976 INFO L93 Difference]: Finished difference Result 57752 states and 69837 transitions. [2022-07-13 13:34:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:34:32,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 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 432 [2022-07-13 13:34:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:33,031 INFO L225 Difference]: With dead ends: 57752 [2022-07-13 13:34:33,031 INFO L226 Difference]: Without dead ends: 35060 [2022-07-13 13:34:33,050 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 [2022-07-13 13:34:33,051 INFO L413 NwaCegarLoop]: 1805 mSDtfsCounter, 3755 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 9454 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 9699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 9454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:33,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3755 Valid, 2160 Invalid, 9699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 9454 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-07-13 13:34:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35060 states. [2022-07-13 13:34:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35060 to 32288. [2022-07-13 13:34:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32288 states, 32287 states have (on average 1.1912844178771642) internal successors, (38463), 32287 states have internal predecessors, (38463), 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) [2022-07-13 13:34:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32288 states to 32288 states and 38463 transitions. [2022-07-13 13:34:33,399 INFO L78 Accepts]: Start accepts. Automaton has 32288 states and 38463 transitions. Word has length 432 [2022-07-13 13:34:33,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:33,400 INFO L495 AbstractCegarLoop]: Abstraction has 32288 states and 38463 transitions. [2022-07-13 13:34:33,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 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) [2022-07-13 13:34:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 32288 states and 38463 transitions. [2022-07-13 13:34:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-07-13 13:34:33,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:33,409 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:34:33,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:34:33,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1520129715, now seen corresponding path program 1 times [2022-07-13 13:34:33,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:33,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774148079] [2022-07-13 13:34:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-13 13:34:33,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:33,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774148079] [2022-07-13 13:34:33,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774148079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:33,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:34:33,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:34:33,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269878588] [2022-07-13 13:34:33,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:33,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:34:33,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:34:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:34:33,588 INFO L87 Difference]: Start difference. First operand 32288 states and 38463 transitions. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 3 states have internal predecessors, (424), 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) [2022-07-13 13:34:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:39,018 INFO L93 Difference]: Finished difference Result 67335 states and 79703 transitions. [2022-07-13 13:34:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:34:39,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 3 states have internal predecessors, (424), 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 [2022-07-13 13:34:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:39,069 INFO L225 Difference]: With dead ends: 67335 [2022-07-13 13:34:39,069 INFO L226 Difference]: Without dead ends: 35018 [2022-07-13 13:34:39,097 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 [2022-07-13 13:34:39,099 INFO L413 NwaCegarLoop]: 1776 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:39,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 1955 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-13 13:34:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35018 states. [2022-07-13 13:34:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35018 to 35018. [2022-07-13 13:34:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35018 states, 35017 states have (on average 1.1765142645000999) internal successors, (41198), 35017 states have internal predecessors, (41198), 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) [2022-07-13 13:34:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35018 states to 35018 states and 41198 transitions. [2022-07-13 13:34:39,511 INFO L78 Accepts]: Start accepts. Automaton has 35018 states and 41198 transitions. Word has length 460 [2022-07-13 13:34:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:39,512 INFO L495 AbstractCegarLoop]: Abstraction has 35018 states and 41198 transitions. [2022-07-13 13:34:39,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 3 states have internal predecessors, (424), 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) [2022-07-13 13:34:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 35018 states and 41198 transitions. [2022-07-13 13:34:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-07-13 13:34:39,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:39,522 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:34:39,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:34:39,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:39,523 INFO L85 PathProgramCache]: Analyzing trace with hash -693982200, now seen corresponding path program 1 times [2022-07-13 13:34:39,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968805782] [2022-07-13 13:34:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:39,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:34:39,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968805782] [2022-07-13 13:34:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968805782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:34:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058753025] [2022-07-13 13:34:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:39,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:34:39,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:34:39,822 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) [2022-07-13 13:34:39,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:34:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:34:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:34:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-13 13:34:40,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:34:40,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058753025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:40,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:34:40,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-13 13:34:40,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643875781] [2022-07-13 13:34:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:40,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:34:40,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:34:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:34:40,688 INFO L87 Difference]: Start difference. First operand 35018 states and 41198 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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) [2022-07-13 13:34:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:46,610 INFO L93 Difference]: Finished difference Result 96010 states and 114187 transitions. [2022-07-13 13:34:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:34:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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 552 [2022-07-13 13:34:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:46,684 INFO L225 Difference]: With dead ends: 96010 [2022-07-13 13:34:46,684 INFO L226 Difference]: Without dead ends: 63724 [2022-07-13 13:34:46,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:34:46,712 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 1007 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4887 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 5914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 4887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:46,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1779 Invalid, 5914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 4887 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-13 13:34:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63724 states. [2022-07-13 13:34:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63724 to 59622. [2022-07-13 13:34:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59622 states, 59621 states have (on average 1.1474815920564903) internal successors, (68414), 59621 states have internal predecessors, (68414), 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) [2022-07-13 13:34:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59622 states to 59622 states and 68414 transitions. [2022-07-13 13:34:47,297 INFO L78 Accepts]: Start accepts. Automaton has 59622 states and 68414 transitions. Word has length 552 [2022-07-13 13:34:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:47,297 INFO L495 AbstractCegarLoop]: Abstraction has 59622 states and 68414 transitions. [2022-07-13 13:34:47,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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) [2022-07-13 13:34:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 59622 states and 68414 transitions. [2022-07-13 13:34:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2022-07-13 13:34:47,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:47,302 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:34:47,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 13:34:47,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:34:47,519 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash -877184422, now seen corresponding path program 1 times [2022-07-13 13:34:47,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:47,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904818720] [2022-07-13 13:34:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-13 13:34:47,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:47,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904818720] [2022-07-13 13:34:47,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904818720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:47,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:34:47,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:34:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684323885] [2022-07-13 13:34:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:47,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:34:47,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:34:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:34:47,740 INFO L87 Difference]: Start difference. First operand 59622 states and 68414 transitions. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 2 states have internal predecessors, (554), 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) [2022-07-13 13:34:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:34:52,831 INFO L93 Difference]: Finished difference Result 135651 states and 155728 transitions. [2022-07-13 13:34:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:34:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 2 states have internal predecessors, (554), 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 626 [2022-07-13 13:34:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:34:52,923 INFO L225 Difference]: With dead ends: 135651 [2022-07-13 13:34:52,924 INFO L226 Difference]: Without dead ends: 78761 [2022-07-13 13:34:52,960 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 [2022-07-13 13:34:52,961 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 1387 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 5597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1670 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:34:52,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1387 Valid, 751 Invalid, 5597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1670 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-07-13 13:34:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78761 states. [2022-07-13 13:34:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78761 to 78736. [2022-07-13 13:34:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78736 states, 78735 states have (on average 1.1164793293960755) internal successors, (87906), 78735 states have internal predecessors, (87906), 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) [2022-07-13 13:34:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78736 states to 78736 states and 87906 transitions. [2022-07-13 13:34:53,713 INFO L78 Accepts]: Start accepts. Automaton has 78736 states and 87906 transitions. Word has length 626 [2022-07-13 13:34:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:34:53,713 INFO L495 AbstractCegarLoop]: Abstraction has 78736 states and 87906 transitions. [2022-07-13 13:34:53,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 2 states have internal predecessors, (554), 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) [2022-07-13 13:34:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 78736 states and 87906 transitions. [2022-07-13 13:34:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2022-07-13 13:34:53,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:34:53,721 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:34:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:34:53,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:34:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:34:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1842723092, now seen corresponding path program 1 times [2022-07-13 13:34:53,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:34:53,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779116094] [2022-07-13 13:34:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:53,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:34:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 125 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:34:54,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:34:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779116094] [2022-07-13 13:34:54,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779116094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:34:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828337848] [2022-07-13 13:34:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:34:54,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:34:54,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:34:54,288 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) [2022-07-13 13:34:54,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:34:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:34:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:34:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:34:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-13 13:34:54,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:34:54,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828337848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:34:54,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:34:54,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-13 13:34:54,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899744619] [2022-07-13 13:34:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:34:54,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:34:54,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:34:54,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:34:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:34:54,803 INFO L87 Difference]: Start difference. First operand 78736 states and 87906 transitions. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2022-07-13 13:35:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:35:00,189 INFO L93 Difference]: Finished difference Result 180701 states and 203752 transitions. [2022-07-13 13:35:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:35:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 759 [2022-07-13 13:35:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:35:00,314 INFO L225 Difference]: With dead ends: 180701 [2022-07-13 13:35:00,315 INFO L226 Difference]: Without dead ends: 103330 [2022-07-13 13:35:00,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:35:00,355 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 1373 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 3758 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3347 SdHoareTripleChecker+Invalid, 5394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 3758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:35:00,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 3347 Invalid, 5394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1636 Valid, 3758 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-13 13:35:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103330 states. [2022-07-13 13:35:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103330 to 103319. [2022-07-13 13:35:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103319 states, 103318 states have (on average 1.0991695541919124) internal successors, (113564), 103318 states have internal predecessors, (113564), 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) [2022-07-13 13:35:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103319 states to 103319 states and 113564 transitions. [2022-07-13 13:35:01,534 INFO L78 Accepts]: Start accepts. Automaton has 103319 states and 113564 transitions. Word has length 759 [2022-07-13 13:35:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:35:01,535 INFO L495 AbstractCegarLoop]: Abstraction has 103319 states and 113564 transitions. [2022-07-13 13:35:01,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2022-07-13 13:35:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 103319 states and 113564 transitions. [2022-07-13 13:35:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-07-13 13:35:01,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:35:01,541 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:35:01,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 13:35:01,751 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,SelfDestructingSolverStorable8 [2022-07-13 13:35:01,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:35:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:35:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1827637450, now seen corresponding path program 1 times [2022-07-13 13:35:01,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:35:01,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510213686] [2022-07-13 13:35:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:01,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:35:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 125 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:35:02,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:35:02,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510213686] [2022-07-13 13:35:02,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510213686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:35:02,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197483636] [2022-07-13 13:35:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:02,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:35:02,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:35:02,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:35:02,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:35:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:02,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:35:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:35:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:35:03,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:35:03,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197483636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:35:03,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:35:03,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-13 13:35:03,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367387175] [2022-07-13 13:35:03,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:35:03,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:35:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:35:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:35:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:35:03,686 INFO L87 Difference]: Start difference. First operand 103319 states and 113564 transitions. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 3 states have internal predecessors, (771), 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) [2022-07-13 13:35:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:35:12,120 INFO L93 Difference]: Finished difference Result 255790 states and 282885 transitions. [2022-07-13 13:35:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:35:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 3 states have internal predecessors, (771), 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 771 [2022-07-13 13:35:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:35:12,361 INFO L225 Difference]: With dead ends: 255790 [2022-07-13 13:35:12,361 INFO L226 Difference]: Without dead ends: 148375 [2022-07-13 13:35:12,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:35:12,387 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 2518 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 7091 mSolverCounterSat, 2199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 9290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2199 IncrementalHoareTripleChecker+Valid, 7091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:35:12,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2518 Valid, 912 Invalid, 9290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2199 Valid, 7091 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-07-13 13:35:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148375 states. [2022-07-13 13:35:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148375 to 133348. [2022-07-13 13:35:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133348 states, 133347 states have (on average 1.0694353828732555) internal successors, (142606), 133347 states have internal predecessors, (142606), 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) [2022-07-13 13:35:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133348 states to 133348 states and 142606 transitions. [2022-07-13 13:35:14,415 INFO L78 Accepts]: Start accepts. Automaton has 133348 states and 142606 transitions. Word has length 771 [2022-07-13 13:35:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:35:14,416 INFO L495 AbstractCegarLoop]: Abstraction has 133348 states and 142606 transitions. [2022-07-13 13:35:14,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 3 states have internal predecessors, (771), 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) [2022-07-13 13:35:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 133348 states and 142606 transitions. [2022-07-13 13:35:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2022-07-13 13:35:14,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:35:14,424 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, 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, 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, 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] [2022-07-13 13:35:14,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 13:35:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:35:14,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:35:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:35:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1828726666, now seen corresponding path program 1 times [2022-07-13 13:35:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:35:14,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090855446] [2022-07-13 13:35:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:14,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:35:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-13 13:35:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:35:15,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090855446] [2022-07-13 13:35:15,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090855446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:35:15,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:35:15,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:35:15,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561480092] [2022-07-13 13:35:15,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:35:15,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:35:15,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:35:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:35:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:35:15,097 INFO L87 Difference]: Start difference. First operand 133348 states and 142606 transitions. Second operand has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 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) [2022-07-13 13:35:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:35:24,117 INFO L93 Difference]: Finished difference Result 428040 states and 460732 transitions. [2022-07-13 13:35:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:35:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 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 849 [2022-07-13 13:35:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:35:24,527 INFO L225 Difference]: With dead ends: 428040 [2022-07-13 13:35:24,527 INFO L226 Difference]: Without dead ends: 294694 [2022-07-13 13:35:24,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:35:24,610 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 3182 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 7907 mSolverCounterSat, 1922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3182 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 9829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1922 IncrementalHoareTripleChecker+Valid, 7907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:35:24,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3182 Valid, 890 Invalid, 9829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1922 Valid, 7907 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-07-13 13:35:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294694 states. [2022-07-13 13:35:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294694 to 280888. [2022-07-13 13:35:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280888 states, 280887 states have (on average 1.0650795515634401) internal successors, (299167), 280887 states have internal predecessors, (299167), 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) [2022-07-13 13:35:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280888 states to 280888 states and 299167 transitions. [2022-07-13 13:35:28,270 INFO L78 Accepts]: Start accepts. Automaton has 280888 states and 299167 transitions. Word has length 849 [2022-07-13 13:35:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:35:28,271 INFO L495 AbstractCegarLoop]: Abstraction has 280888 states and 299167 transitions. [2022-07-13 13:35:28,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 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) [2022-07-13 13:35:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 280888 states and 299167 transitions. [2022-07-13 13:35:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2022-07-13 13:35:28,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:35:28,282 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, 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, 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, 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, 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] [2022-07-13 13:35:28,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:35:28,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:35:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:35:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 552688653, now seen corresponding path program 1 times [2022-07-13 13:35:28,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:35:28,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133698582] [2022-07-13 13:35:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:28,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:35:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 126 proven. 451 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-13 13:35:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:35:28,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133698582] [2022-07-13 13:35:28,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133698582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:35:28,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520160572] [2022-07-13 13:35:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:28,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:35:28,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:35:28,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:35:28,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 13:35:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:35:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:35:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-07-13 13:35:29,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:35:29,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520160572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:35:29,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:35:29,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 13:35:29,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666961059] [2022-07-13 13:35:29,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:35:29,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:35:29,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:35:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:35:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:35:29,117 INFO L87 Difference]: Start difference. First operand 280888 states and 299167 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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) [2022-07-13 13:35:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:35:34,662 INFO L93 Difference]: Finished difference Result 636853 states and 681685 transitions. [2022-07-13 13:35:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:35:34,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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 944 [2022-07-13 13:35:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:35:35,481 INFO L225 Difference]: With dead ends: 636853 [2022-07-13 13:35:35,482 INFO L226 Difference]: Without dead ends: 340950 [2022-07-13 13:35:35,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:35:35,564 INFO L413 NwaCegarLoop]: 2436 mSDtfsCounter, 1531 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 3544 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 4629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 3544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:35:35,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1531 Valid, 2580 Invalid, 4629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 3544 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-13 13:35:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340950 states. [2022-07-13 13:35:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340950 to 340923. [2022-07-13 13:35:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340923 states, 340922 states have (on average 1.0610374220496184) internal successors, (361731), 340922 states have internal predecessors, (361731), 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) [2022-07-13 13:35:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340923 states to 340923 states and 361731 transitions. [2022-07-13 13:35:39,793 INFO L78 Accepts]: Start accepts. Automaton has 340923 states and 361731 transitions. Word has length 944 [2022-07-13 13:35:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:35:39,793 INFO L495 AbstractCegarLoop]: Abstraction has 340923 states and 361731 transitions. [2022-07-13 13:35:39,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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) [2022-07-13 13:35:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 340923 states and 361731 transitions. [2022-07-13 13:35:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2022-07-13 13:35:39,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:35:39,802 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, 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, 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, 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, 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] [2022-07-13 13:35:39,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 13:35:40,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:35:40,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:35:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:35:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1722686724, now seen corresponding path program 1 times [2022-07-13 13:35:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:35:40,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270818905] [2022-07-13 13:35:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:40,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:35:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-13 13:35:40,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:35:40,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270818905] [2022-07-13 13:35:40,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270818905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:35:40,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:35:40,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:35:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156667123] [2022-07-13 13:35:40,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:35:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:35:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:35:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:35:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:35:40,307 INFO L87 Difference]: Start difference. First operand 340923 states and 361731 transitions. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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) [2022-07-13 13:35:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:35:46,155 INFO L93 Difference]: Finished difference Result 679121 states and 720724 transitions. [2022-07-13 13:35:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:35:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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 950 [2022-07-13 13:35:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:35:46,689 INFO L225 Difference]: With dead ends: 679121 [2022-07-13 13:35:46,690 INFO L226 Difference]: Without dead ends: 339565 [2022-07-13 13:35:46,848 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 [2022-07-13 13:35:46,849 INFO L413 NwaCegarLoop]: 2498 mSDtfsCounter, 1356 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3865 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 4176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 3865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:35:46,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 2690 Invalid, 4176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 3865 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-13 13:35:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339565 states. [2022-07-13 13:35:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339565 to 339555. [2022-07-13 13:35:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339555 states, 339554 states have (on average 1.0561677965802199) internal successors, (358626), 339554 states have internal predecessors, (358626), 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) [2022-07-13 13:35:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339555 states to 339555 states and 358626 transitions. [2022-07-13 13:35:51,110 INFO L78 Accepts]: Start accepts. Automaton has 339555 states and 358626 transitions. Word has length 950 [2022-07-13 13:35:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:35:51,110 INFO L495 AbstractCegarLoop]: Abstraction has 339555 states and 358626 transitions. [2022-07-13 13:35:51,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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) [2022-07-13 13:35:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 339555 states and 358626 transitions. [2022-07-13 13:35:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2022-07-13 13:35:51,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:35:51,120 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, 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, 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, 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, 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] [2022-07-13 13:35:51,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:35:51,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:35:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:35:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1469609421, now seen corresponding path program 1 times [2022-07-13 13:35:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:35:51,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632220505] [2022-07-13 13:35:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:35:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 126 proven. 466 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-13 13:35:51,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:35:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632220505] [2022-07-13 13:35:51,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632220505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:35:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521992724] [2022-07-13 13:35:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:35:51,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:35:51,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:35:51,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:35:51,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 13:35:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:35:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:35:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:35:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-07-13 13:35:52,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:35:52,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521992724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:35:52,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:35:52,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 13:35:52,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129040663] [2022-07-13 13:35:52,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:35:52,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:35:52,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:35:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:35:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:35:52,207 INFO L87 Difference]: Start difference. First operand 339555 states and 358626 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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) [2022-07-13 13:35:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:35:58,704 INFO L93 Difference]: Finished difference Result 773428 states and 821294 transitions. [2022-07-13 13:35:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:35:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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 959 [2022-07-13 13:35:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:35:59,308 INFO L225 Difference]: With dead ends: 773428 [2022-07-13 13:35:59,308 INFO L226 Difference]: Without dead ends: 435240 [2022-07-13 13:35:59,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 959 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:35:59,799 INFO L413 NwaCegarLoop]: 2662 mSDtfsCounter, 1418 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 3985 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 3985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:35:59,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 2836 Invalid, 4901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 3985 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-13 13:36:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435240 states.