./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label43.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_label43.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 62761b3785e62b00e38a2b72a515b0478c38d00e83f95ad63b6d7081302ecf99 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 13:11:36,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 13:11:36,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 13:11:36,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 13:11:36,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 13:11:36,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 13:11:36,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 13:11:36,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 13:11:36,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 13:11:36,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 13:11:36,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 13:11:36,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 13:11:36,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 13:11:36,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 13:11:36,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 13:11:36,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 13:11:36,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 13:11:36,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 13:11:36,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 13:11:36,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 13:11:36,295 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 13:11:36,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 13:11:36,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 13:11:36,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 13:11:36,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 13:11:36,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 13:11:36,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 13:11:36,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 13:11:36,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 13:11:36,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 13:11:36,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 13:11:36,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 13:11:36,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 13:11:36,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 13:11:36,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 13:11:36,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 13:11:36,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 13:11:36,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 13:11:36,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 13:11:36,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 13:11:36,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 13:11:36,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 13:11:36,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 13:11:36,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 13:11:36,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 13:11:36,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 13:11:36,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 13:11:36,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 13:11:36,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 13:11:36,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 13:11:36,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 13:11:36,333 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 13:11:36,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 13:11:36,334 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 13:11:36,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 13:11:36,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 13:11:36,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 13:11:36,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 13:11:36,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 13:11:36,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 13:11:36,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:11:36,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 13:11:36,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 13:11:36,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 13:11:36,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 13:11:36,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 13:11:36,337 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 13:11:36,338 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 13:11:36,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 13:11:36,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62761b3785e62b00e38a2b72a515b0478c38d00e83f95ad63b6d7081302ecf99 [2022-07-22 13:11:36,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 13:11:36,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 13:11:36,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 13:11:36,553 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 13:11:36,554 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 13:11:36,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label43.c [2022-07-22 13:11:36,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c6a4807/da9fb09ebfd54a5eb835742803250b33/FLAG498fcf850 [2022-07-22 13:11:37,267 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 13:11:37,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label43.c [2022-07-22 13:11:37,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c6a4807/da9fb09ebfd54a5eb835742803250b33/FLAG498fcf850 [2022-07-22 13:11:37,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c6a4807/da9fb09ebfd54a5eb835742803250b33 [2022-07-22 13:11:37,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 13:11:37,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 13:11:37,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 13:11:37,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 13:11:37,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 13:11:37,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:11:37" (1/1) ... [2022-07-22 13:11:37,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2d2c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:37, skipping insertion in model container [2022-07-22 13:11:37,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:11:37" (1/1) ... [2022-07-22 13:11:37,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 13:11:37,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 13:11:37,987 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_label43.c[3247,3260] [2022-07-22 13:11:38,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:11:38,868 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 13:11:38,889 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_label43.c[3247,3260] [2022-07-22 13:11:39,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:11:39,555 INFO L208 MainTranslator]: Completed translation [2022-07-22 13:11:39,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39 WrapperNode [2022-07-22 13:11:39,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 13:11:39,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 13:11:39,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 13:11:39,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 13:11:39,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:39,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:40,246 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-07-22 13:11:40,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 13:11:40,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 13:11:40,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 13:11:40,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 13:11:40,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:40,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:40,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:40,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:40,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:40,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:40,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:41,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 13:11:41,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 13:11:41,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 13:11:41,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 13:11:41,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (1/1) ... [2022-07-22 13:11:41,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:11:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:11:41,087 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) [2022-07-22 13:11:41,123 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 [2022-07-22 13:11:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 13:11:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 13:11:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 13:11:41,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 13:11:41,198 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 13:11:41,199 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 13:11:46,563 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 13:11:46,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 13:11:46,581 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 13:11:46,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:11:46 BoogieIcfgContainer [2022-07-22 13:11:46,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 13:11:46,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 13:11:46,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 13:11:46,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 13:11:46,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 01:11:37" (1/3) ... [2022-07-22 13:11:46,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181b0b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:11:46, skipping insertion in model container [2022-07-22 13:11:46,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:11:39" (2/3) ... [2022-07-22 13:11:46,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181b0b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:11:46, skipping insertion in model container [2022-07-22 13:11:46,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:11:46" (3/3) ... [2022-07-22 13:11:46,601 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2022-07-22 13:11:46,610 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 13:11:46,611 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 13:11:46,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 13:11:46,672 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@65182013, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@54f22c62 [2022-07-22 13:11:46,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 13:11:46,685 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) [2022-07-22 13:11:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 13:11:46,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:11:46,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:11:46,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:11:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:11:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2022-07-22 13:11:46,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:11:46,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710279100] [2022-07-22 13:11:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:11:46,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:11:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:11:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:11:46,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:11:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710279100] [2022-07-22 13:11:46,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710279100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:11:46,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:11:46,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:11:46,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054794934] [2022-07-22 13:11:46,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:11:46,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:11:46,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:11:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:11:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:11:46,915 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 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2022-07-22 13:11:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:11:52,427 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2022-07-22 13:11:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:11:52,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 22 [2022-07-22 13:11:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:11:52,449 INFO L225 Difference]: With dead ends: 4919 [2022-07-22 13:11:52,450 INFO L226 Difference]: Without dead ends: 3107 [2022-07-22 13:11:52,456 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 [2022-07-22 13:11:52,459 INFO L413 NwaCegarLoop]: 1276 mSDtfsCounter, 1531 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 5748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:11:52,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1531 Valid, 1457 Invalid, 5748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 4638 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-22 13:11:52,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-07-22 13:11:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2022-07-22 13:11:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.652818035426731) internal successors, (5132), 3105 states have internal predecessors, (5132), 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) [2022-07-22 13:11:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2022-07-22 13:11:52,561 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 22 [2022-07-22 13:11:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:11:52,562 INFO L495 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2022-07-22 13:11:52,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2022-07-22 13:11:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2022-07-22 13:11:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 13:11:52,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:11:52,566 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 13:11:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 13:11:52,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:11:52,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:11:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1906323970, now seen corresponding path program 1 times [2022-07-22 13:11:52,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:11:52,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184388320] [2022-07-22 13:11:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:11:52,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:11:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:11:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:11:52,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:11:52,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184388320] [2022-07-22 13:11:52,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184388320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:11:52,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:11:52,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:11:52,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219973328] [2022-07-22 13:11:52,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:11:52,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:11:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:11:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:11:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:11:52,728 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-07-22 13:12:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:01,963 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2022-07-22 13:12:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:12:01,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2022-07-22 13:12:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:01,984 INFO L225 Difference]: With dead ends: 10391 [2022-07-22 13:12:01,985 INFO L226 Difference]: Without dead ends: 7287 [2022-07-22 13:12:01,993 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 [2022-07-22 13:12:01,994 INFO L413 NwaCegarLoop]: 1842 mSDtfsCounter, 4207 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11122 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 12528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 11122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:01,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4207 Valid, 2104 Invalid, 12528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1406 Valid, 11122 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-07-22 13:12:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2022-07-22 13:12:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2022-07-22 13:12:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5214927436074637) internal successors, (11008), 7235 states have internal predecessors, (11008), 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) [2022-07-22 13:12:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11008 transitions. [2022-07-22 13:12:02,115 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11008 transitions. Word has length 91 [2022-07-22 13:12:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:02,116 INFO L495 AbstractCegarLoop]: Abstraction has 7236 states and 11008 transitions. [2022-07-22 13:12:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-07-22 13:12:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11008 transitions. [2022-07-22 13:12:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-22 13:12:02,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:02,128 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 13:12:02,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 13:12:02,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:02,132 INFO L85 PathProgramCache]: Analyzing trace with hash 275460643, now seen corresponding path program 1 times [2022-07-22 13:12:02,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:02,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206739671] [2022-07-22 13:12:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:02,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:02,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206739671] [2022-07-22 13:12:02,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206739671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:02,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:12:02,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:12:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811111110] [2022-07-22 13:12:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:02,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:12:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:02,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:12:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:12:02,347 INFO L87 Difference]: Start difference. First operand 7236 states and 11008 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2022-07-22 13:12:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:07,272 INFO L93 Difference]: Finished difference Result 15858 states and 25896 transitions. [2022-07-22 13:12:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:12:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 257 [2022-07-22 13:12:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:07,298 INFO L225 Difference]: With dead ends: 15858 [2022-07-22 13:12:07,298 INFO L226 Difference]: Without dead ends: 9989 [2022-07-22 13:12:07,308 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 [2022-07-22 13:12:07,312 INFO L413 NwaCegarLoop]: 2905 mSDtfsCounter, 1589 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 1906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1906 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:07,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1589 Valid, 3095 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1906 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-22 13:12:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2022-07-22 13:12:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 9987. [2022-07-22 13:12:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.4261966753454838) internal successors, (14242), 9986 states have internal predecessors, (14242), 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) [2022-07-22 13:12:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14242 transitions. [2022-07-22 13:12:07,446 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14242 transitions. Word has length 257 [2022-07-22 13:12:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:07,447 INFO L495 AbstractCegarLoop]: Abstraction has 9987 states and 14242 transitions. [2022-07-22 13:12:07,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2022-07-22 13:12:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14242 transitions. [2022-07-22 13:12:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-22 13:12:07,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:07,450 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:07,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 13:12:07,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2127912823, now seen corresponding path program 1 times [2022-07-22 13:12:07,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:07,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822356956] [2022-07-22 13:12:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:07,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:07,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:07,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822356956] [2022-07-22 13:12:07,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822356956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:07,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:12:07,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:12:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968308516] [2022-07-22 13:12:07,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:07,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:12:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:12:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:12:07,674 INFO L87 Difference]: Start difference. First operand 9987 states and 14242 transitions. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 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) [2022-07-22 13:12:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:13,548 INFO L93 Difference]: Finished difference Result 18638 states and 27136 transitions. [2022-07-22 13:12:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:12:13,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2022-07-22 13:12:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:13,583 INFO L225 Difference]: With dead ends: 18638 [2022-07-22 13:12:13,584 INFO L226 Difference]: Without dead ends: 9987 [2022-07-22 13:12:13,593 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 [2022-07-22 13:12:13,595 INFO L413 NwaCegarLoop]: 1764 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7313 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:13,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 2106 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7313 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-07-22 13:12:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2022-07-22 13:12:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9987. [2022-07-22 13:12:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.4252954135790106) internal successors, (14233), 9986 states have internal predecessors, (14233), 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) [2022-07-22 13:12:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14233 transitions. [2022-07-22 13:12:13,744 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14233 transitions. Word has length 324 [2022-07-22 13:12:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:13,745 INFO L495 AbstractCegarLoop]: Abstraction has 9987 states and 14233 transitions. [2022-07-22 13:12:13,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 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) [2022-07-22 13:12:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14233 transitions. [2022-07-22 13:12:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-07-22 13:12:13,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:13,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:13,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 13:12:13,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1084917904, now seen corresponding path program 1 times [2022-07-22 13:12:13,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95468542] [2022-07-22 13:12:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:13,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:14,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:14,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95468542] [2022-07-22 13:12:14,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95468542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:12:14,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947989850] [2022-07-22 13:12:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:14,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:14,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:12:14,091 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) [2022-07-22 13:12:14,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 13:12:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:14,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:12:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:12:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:14,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:12:14,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947989850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:14,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:12:14,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 13:12:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87259745] [2022-07-22 13:12:14,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:12:14,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:12:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:12:14,389 INFO L87 Difference]: Start difference. First operand 9987 states and 14233 transitions. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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) [2022-07-22 13:12:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:19,012 INFO L93 Difference]: Finished difference Result 26790 states and 39374 transitions. [2022-07-22 13:12:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:12:19,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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 578 [2022-07-22 13:12:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:19,042 INFO L225 Difference]: With dead ends: 26790 [2022-07-22 13:12:19,042 INFO L226 Difference]: Without dead ends: 18170 [2022-07-22 13:12:19,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:12:19,053 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 2531 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4050 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 5522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:19,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2531 Valid, 813 Invalid, 5522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4050 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-22 13:12:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18170 states. [2022-07-22 13:12:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18170 to 18169. [2022-07-22 13:12:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18169 states, 18168 states have (on average 1.4180427124614707) internal successors, (25763), 18168 states have internal predecessors, (25763), 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) [2022-07-22 13:12:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18169 states to 18169 states and 25763 transitions. [2022-07-22 13:12:19,239 INFO L78 Accepts]: Start accepts. Automaton has 18169 states and 25763 transitions. Word has length 578 [2022-07-22 13:12:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:19,240 INFO L495 AbstractCegarLoop]: Abstraction has 18169 states and 25763 transitions. [2022-07-22 13:12:19,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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) [2022-07-22 13:12:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 18169 states and 25763 transitions. [2022-07-22 13:12:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-07-22 13:12:19,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:19,247 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:19,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 13:12:19,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:19,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1177461922, now seen corresponding path program 1 times [2022-07-22 13:12:19,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:19,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230097268] [2022-07-22 13:12:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 13:12:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230097268] [2022-07-22 13:12:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230097268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:19,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:12:19,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:12:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068925839] [2022-07-22 13:12:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:19,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:12:19,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:12:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:12:19,663 INFO L87 Difference]: Start difference. First operand 18169 states and 25763 transitions. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 2 states have internal predecessors, (502), 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) [2022-07-22 13:12:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:23,888 INFO L93 Difference]: Finished difference Result 40438 states and 57708 transitions. [2022-07-22 13:12:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:12:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 2 states have internal predecessors, (502), 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 585 [2022-07-22 13:12:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:23,922 INFO L225 Difference]: With dead ends: 40438 [2022-07-22 13:12:23,923 INFO L226 Difference]: Without dead ends: 23636 [2022-07-22 13:12:23,939 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 [2022-07-22 13:12:23,940 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 1391 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 5584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1659 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:23,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 732 Invalid, 5584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1659 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-22 13:12:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2022-07-22 13:12:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 23632. [2022-07-22 13:12:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23632 states, 23631 states have (on average 1.3269857390715585) internal successors, (31358), 23631 states have internal predecessors, (31358), 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) [2022-07-22 13:12:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23632 states to 23632 states and 31358 transitions. [2022-07-22 13:12:24,177 INFO L78 Accepts]: Start accepts. Automaton has 23632 states and 31358 transitions. Word has length 585 [2022-07-22 13:12:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:24,178 INFO L495 AbstractCegarLoop]: Abstraction has 23632 states and 31358 transitions. [2022-07-22 13:12:24,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 2 states have internal predecessors, (502), 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) [2022-07-22 13:12:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 23632 states and 31358 transitions. [2022-07-22 13:12:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-07-22 13:12:24,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:24,264 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:24,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 13:12:24,265 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:24,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1045989357, now seen corresponding path program 1 times [2022-07-22 13:12:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314362913] [2022-07-22 13:12:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 39 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:24,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:24,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314362913] [2022-07-22 13:12:24,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314362913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:12:24,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046822141] [2022-07-22 13:12:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:24,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:24,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:12:24,784 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) [2022-07-22 13:12:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 13:12:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:24,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:12:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:12:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 13:12:24,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:12:24,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046822141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:24,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:12:24,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 13:12:24,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990504530] [2022-07-22 13:12:24,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:12:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:12:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 13:12:24,995 INFO L87 Difference]: Start difference. First operand 23632 states and 31358 transitions. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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) [2022-07-22 13:12:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:30,748 INFO L93 Difference]: Finished difference Result 67757 states and 90811 transitions. [2022-07-22 13:12:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:12:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 591 [2022-07-22 13:12:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:30,801 INFO L225 Difference]: With dead ends: 67757 [2022-07-22 13:12:30,802 INFO L226 Difference]: Without dead ends: 45492 [2022-07-22 13:12:30,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 13:12:30,826 INFO L413 NwaCegarLoop]: 2083 mSDtfsCounter, 1643 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4895 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 5948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 4895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:30,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 2185 Invalid, 5948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 4895 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-22 13:12:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45492 states. [2022-07-22 13:12:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45492 to 45478. [2022-07-22 13:12:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45478 states, 45477 states have (on average 1.3033181608285507) internal successors, (59271), 45477 states have internal predecessors, (59271), 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) [2022-07-22 13:12:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45478 states to 45478 states and 59271 transitions. [2022-07-22 13:12:31,276 INFO L78 Accepts]: Start accepts. Automaton has 45478 states and 59271 transitions. Word has length 591 [2022-07-22 13:12:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:31,277 INFO L495 AbstractCegarLoop]: Abstraction has 45478 states and 59271 transitions. [2022-07-22 13:12:31,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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) [2022-07-22 13:12:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 45478 states and 59271 transitions. [2022-07-22 13:12:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2022-07-22 13:12:31,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:31,281 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:31,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 13:12:31,499 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,SelfDestructingSolverStorable6 [2022-07-22 13:12:31,499 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1991304213, now seen corresponding path program 1 times [2022-07-22 13:12:31,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:31,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350679353] [2022-07-22 13:12:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:31,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:31,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:31,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350679353] [2022-07-22 13:12:31,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350679353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:31,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:12:31,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:12:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647984939] [2022-07-22 13:12:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:31,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:12:31,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:12:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:12:31,741 INFO L87 Difference]: Start difference. First operand 45478 states and 59271 transitions. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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) [2022-07-22 13:12:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:36,729 INFO L93 Difference]: Finished difference Result 114213 states and 148417 transitions. [2022-07-22 13:12:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:12:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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 607 [2022-07-22 13:12:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:36,820 INFO L225 Difference]: With dead ends: 114213 [2022-07-22 13:12:36,821 INFO L226 Difference]: Without dead ends: 68737 [2022-07-22 13:12:36,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:12:36,878 INFO L413 NwaCegarLoop]: 1933 mSDtfsCounter, 1619 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4164 mSolverCounterSat, 2284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 6448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2284 IncrementalHoareTripleChecker+Valid, 4164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:36,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1619 Valid, 2015 Invalid, 6448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2284 Valid, 4164 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-22 13:12:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68737 states. [2022-07-22 13:12:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68737 to 68691. [2022-07-22 13:12:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68691 states, 68690 states have (on average 1.2739845683505604) internal successors, (87510), 68690 states have internal predecessors, (87510), 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) [2022-07-22 13:12:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68691 states to 68691 states and 87510 transitions. [2022-07-22 13:12:37,588 INFO L78 Accepts]: Start accepts. Automaton has 68691 states and 87510 transitions. Word has length 607 [2022-07-22 13:12:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:37,588 INFO L495 AbstractCegarLoop]: Abstraction has 68691 states and 87510 transitions. [2022-07-22 13:12:37,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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) [2022-07-22 13:12:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 68691 states and 87510 transitions. [2022-07-22 13:12:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2022-07-22 13:12:37,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:37,594 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:37,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 13:12:37,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1357063286, now seen corresponding path program 1 times [2022-07-22 13:12:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:37,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698430148] [2022-07-22 13:12:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 39 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698430148] [2022-07-22 13:12:37,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698430148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:12:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437628228] [2022-07-22 13:12:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:37,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:37,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:12:37,921 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) [2022-07-22 13:12:37,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 13:12:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:12:38,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:12:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:38,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:12:38,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437628228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:38,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:12:38,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 13:12:38,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246633990] [2022-07-22 13:12:38,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:38,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:12:38,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:12:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 13:12:38,269 INFO L87 Difference]: Start difference. First operand 68691 states and 87510 transitions. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 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) [2022-07-22 13:12:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:43,874 INFO L93 Difference]: Finished difference Result 182403 states and 233219 transitions. [2022-07-22 13:12:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:12:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 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 677 [2022-07-22 13:12:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:44,018 INFO L225 Difference]: With dead ends: 182403 [2022-07-22 13:12:44,019 INFO L226 Difference]: Without dead ends: 116444 [2022-07-22 13:12:44,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 13:12:44,052 INFO L413 NwaCegarLoop]: 1360 mSDtfsCounter, 1592 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 1716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 5559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1716 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:44,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1592 Valid, 1492 Invalid, 5559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1716 Valid, 3843 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-22 13:12:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116444 states. [2022-07-22 13:12:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116444 to 102794. [2022-07-22 13:12:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102794 states, 102793 states have (on average 1.1904798964910062) internal successors, (122373), 102793 states have internal predecessors, (122373), 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) [2022-07-22 13:12:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102794 states to 102794 states and 122373 transitions. [2022-07-22 13:12:45,368 INFO L78 Accepts]: Start accepts. Automaton has 102794 states and 122373 transitions. Word has length 677 [2022-07-22 13:12:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:45,369 INFO L495 AbstractCegarLoop]: Abstraction has 102794 states and 122373 transitions. [2022-07-22 13:12:45,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 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) [2022-07-22 13:12:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 102794 states and 122373 transitions. [2022-07-22 13:12:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2022-07-22 13:12:45,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:45,374 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:45,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 13:12:45,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:45,585 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1304539255, now seen corresponding path program 1 times [2022-07-22 13:12:45,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:45,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626660467] [2022-07-22 13:12:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:45,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-07-22 13:12:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:46,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626660467] [2022-07-22 13:12:46,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626660467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:12:46,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726989428] [2022-07-22 13:12:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:46,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:46,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:12:46,330 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) [2022-07-22 13:12:46,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 13:12:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:46,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:12:46,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:12:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 13:12:47,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:12:47,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726989428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:47,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:12:47,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 13:12:47,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254756877] [2022-07-22 13:12:47,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:12:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:12:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:12:47,099 INFO L87 Difference]: Start difference. First operand 102794 states and 122373 transitions. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 2 states have internal predecessors, (700), 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) [2022-07-22 13:12:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:12:53,118 INFO L93 Difference]: Finished difference Result 205649 states and 244718 transitions. [2022-07-22 13:12:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:12:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 2 states have internal predecessors, (700), 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 719 [2022-07-22 13:12:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:12:53,241 INFO L225 Difference]: With dead ends: 205649 [2022-07-22 13:12:53,242 INFO L226 Difference]: Without dead ends: 105587 [2022-07-22 13:12:53,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:12:53,282 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 1153 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 1695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 5877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1695 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:12:53,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 1262 Invalid, 5877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1695 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-22 13:12:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105587 states. [2022-07-22 13:12:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105587 to 101432. [2022-07-22 13:12:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101432 states, 101431 states have (on average 1.1413374609340339) internal successors, (115767), 101431 states have internal predecessors, (115767), 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) [2022-07-22 13:12:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101432 states to 101432 states and 115767 transitions. [2022-07-22 13:12:54,491 INFO L78 Accepts]: Start accepts. Automaton has 101432 states and 115767 transitions. Word has length 719 [2022-07-22 13:12:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:12:54,491 INFO L495 AbstractCegarLoop]: Abstraction has 101432 states and 115767 transitions. [2022-07-22 13:12:54,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 2 states have internal predecessors, (700), 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) [2022-07-22 13:12:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 101432 states and 115767 transitions. [2022-07-22 13:12:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2022-07-22 13:12:54,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:12:54,497 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:12:54,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 13:12:54,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:54,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:12:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:12:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash 537888153, now seen corresponding path program 1 times [2022-07-22 13:12:54,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:12:54,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307565456] [2022-07-22 13:12:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:54,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:12:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 39 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:55,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:12:55,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307565456] [2022-07-22 13:12:55,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307565456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:12:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918378792] [2022-07-22 13:12:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:12:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:12:55,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:12:55,615 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) [2022-07-22 13:12:55,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 13:12:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:12:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 13:12:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:12:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:12:56,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:12:56,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918378792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:12:56,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:12:56,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-22 13:12:56,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541832845] [2022-07-22 13:12:56,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:12:56,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:12:56,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:12:56,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:12:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-22 13:12:56,829 INFO L87 Difference]: Start difference. First operand 101432 states and 115767 transitions. Second operand has 4 states, 4 states have (on average 182.0) internal successors, (728), 3 states have internal predecessors, (728), 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) [2022-07-22 13:13:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:04,385 INFO L93 Difference]: Finished difference Result 219250 states and 251700 transitions. [2022-07-22 13:13:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:13:04,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 182.0) internal successors, (728), 3 states have internal predecessors, (728), 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 728 [2022-07-22 13:13:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:04,645 INFO L225 Difference]: With dead ends: 219250 [2022-07-22 13:13:04,646 INFO L226 Difference]: Without dead ends: 119181 [2022-07-22 13:13:04,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-22 13:13:04,663 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 3805 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 3469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 9043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3469 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:04,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3805 Valid, 837 Invalid, 9043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3469 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-07-22 13:13:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119181 states. [2022-07-22 13:13:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119181 to 119178. [2022-07-22 13:13:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119178 states, 119177 states have (on average 1.0842108796160332) internal successors, (129213), 119177 states have internal predecessors, (129213), 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) [2022-07-22 13:13:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119178 states to 119178 states and 129213 transitions. [2022-07-22 13:13:05,965 INFO L78 Accepts]: Start accepts. Automaton has 119178 states and 129213 transitions. Word has length 728 [2022-07-22 13:13:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:05,965 INFO L495 AbstractCegarLoop]: Abstraction has 119178 states and 129213 transitions. [2022-07-22 13:13:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.0) internal successors, (728), 3 states have internal predecessors, (728), 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) [2022-07-22 13:13:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 119178 states and 129213 transitions. [2022-07-22 13:13:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 941 [2022-07-22 13:13:05,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:05,973 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:05,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 13:13:06,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 13:13:06,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1937906783, now seen corresponding path program 1 times [2022-07-22 13:13:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:06,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363068495] [2022-07-22 13:13:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 487 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 13:13:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:06,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363068495] [2022-07-22 13:13:06,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363068495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:06,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:06,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:13:06,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263827739] [2022-07-22 13:13:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:06,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:13:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:13:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:13:06,822 INFO L87 Difference]: Start difference. First operand 119178 states and 129213 transitions. Second operand has 4 states, 4 states have (on average 183.0) internal successors, (732), 3 states have internal predecessors, (732), 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) [2022-07-22 13:13:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:12,437 INFO L93 Difference]: Finished difference Result 278140 states and 299947 transitions. [2022-07-22 13:13:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:13:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 183.0) internal successors, (732), 3 states have internal predecessors, (732), 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 940 [2022-07-22 13:13:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:12,678 INFO L225 Difference]: With dead ends: 278140 [2022-07-22 13:13:12,679 INFO L226 Difference]: Without dead ends: 161694 [2022-07-22 13:13:12,731 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 [2022-07-22 13:13:12,732 INFO L413 NwaCegarLoop]: 1279 mSDtfsCounter, 2389 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 7057 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2389 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 7188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 7057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:12,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2389 Valid, 1623 Invalid, 7188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 7057 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-22 13:13:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161694 states. [2022-07-22 13:13:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161694 to 158933. [2022-07-22 13:13:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158933 states, 158932 states have (on average 1.0729116855007172) internal successors, (170520), 158932 states have internal predecessors, (170520), 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) [2022-07-22 13:13:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158933 states to 158933 states and 170520 transitions. [2022-07-22 13:13:14,520 INFO L78 Accepts]: Start accepts. Automaton has 158933 states and 170520 transitions. Word has length 940 [2022-07-22 13:13:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:14,521 INFO L495 AbstractCegarLoop]: Abstraction has 158933 states and 170520 transitions. [2022-07-22 13:13:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.0) internal successors, (732), 3 states have internal predecessors, (732), 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) [2022-07-22 13:13:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 158933 states and 170520 transitions. [2022-07-22 13:13:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 954 [2022-07-22 13:13:14,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:14,769 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 13:13:14,769 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash -151616378, now seen corresponding path program 1 times [2022-07-22 13:13:14,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361241671] [2022-07-22 13:13:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-07-22 13:13:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361241671] [2022-07-22 13:13:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361241671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:15,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:15,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 13:13:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072796013] [2022-07-22 13:13:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:15,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:13:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:13:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:13:15,103 INFO L87 Difference]: Start difference. First operand 158933 states and 170520 transitions. Second operand has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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) [2022-07-22 13:13:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:21,666 INFO L93 Difference]: Finished difference Result 405240 states and 439545 transitions. [2022-07-22 13:13:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:13:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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 953 [2022-07-22 13:13:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:22,037 INFO L225 Difference]: With dead ends: 405240 [2022-07-22 13:13:22,037 INFO L226 Difference]: Without dead ends: 249039 [2022-07-22 13:13:22,328 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 [2022-07-22 13:13:22,329 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 4877 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 5340 mSolverCounterSat, 1769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4877 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 7109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1769 IncrementalHoareTripleChecker+Valid, 5340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:22,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4877 Valid, 873 Invalid, 7109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1769 Valid, 5340 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-22 13:13:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249039 states. [2022-07-22 13:13:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249039 to 249028. [2022-07-22 13:13:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249028 states, 249027 states have (on average 1.0647038272958353) internal successors, (265140), 249027 states have internal predecessors, (265140), 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) [2022-07-22 13:13:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249028 states to 249028 states and 265140 transitions. [2022-07-22 13:13:25,456 INFO L78 Accepts]: Start accepts. Automaton has 249028 states and 265140 transitions. Word has length 953 [2022-07-22 13:13:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:25,456 INFO L495 AbstractCegarLoop]: Abstraction has 249028 states and 265140 transitions. [2022-07-22 13:13:25,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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) [2022-07-22 13:13:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 249028 states and 265140 transitions. [2022-07-22 13:13:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-07-22 13:13:25,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:25,464 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:25,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 13:13:25,465 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1242863874, now seen corresponding path program 1 times [2022-07-22 13:13:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:25,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584361526] [2022-07-22 13:13:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:25,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 40 proven. 460 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-22 13:13:25,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584361526] [2022-07-22 13:13:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584361526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:13:25,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897107090] [2022-07-22 13:13:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:25,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:13:25,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:13:25,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 13:13:25,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 13:13:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:13:26,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:13:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-07-22 13:13:26,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:13:26,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897107090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:26,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:13:26,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 13:13:26,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642527518] [2022-07-22 13:13:26,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:26,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:13:26,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:13:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:13:26,296 INFO L87 Difference]: Start difference. First operand 249028 states and 265140 transitions. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-07-22 13:13:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:31,644 INFO L93 Difference]: Finished difference Result 552660 states and 590949 transitions. [2022-07-22 13:13:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:13:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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 954 [2022-07-22 13:13:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:32,052 INFO L225 Difference]: With dead ends: 552660 [2022-07-22 13:13:32,052 INFO L226 Difference]: Without dead ends: 292710 [2022-07-22 13:13:32,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:13:32,175 INFO L413 NwaCegarLoop]: 2419 mSDtfsCounter, 1473 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 3540 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 4397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 3540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:32,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1473 Valid, 2548 Invalid, 4397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 3540 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-22 13:13:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292710 states. [2022-07-22 13:13:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292710 to 292698. [2022-07-22 13:13:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292698 states, 292697 states have (on average 1.0577218078764046) internal successors, (309592), 292697 states have internal predecessors, (309592), 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) [2022-07-22 13:13:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292698 states to 292698 states and 309592 transitions. [2022-07-22 13:13:35,891 INFO L78 Accepts]: Start accepts. Automaton has 292698 states and 309592 transitions. Word has length 954 [2022-07-22 13:13:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:35,891 INFO L495 AbstractCegarLoop]: Abstraction has 292698 states and 309592 transitions. [2022-07-22 13:13:35,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-07-22 13:13:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 292698 states and 309592 transitions. [2022-07-22 13:13:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1058 [2022-07-22 13:13:35,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:35,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 13:13:35,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 13:13:36,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:13:36,123 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:36,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1874854530, now seen corresponding path program 1 times [2022-07-22 13:13:36,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:36,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826526699] [2022-07-22 13:13:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 833 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-22 13:13:36,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826526699] [2022-07-22 13:13:36,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826526699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:36,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:36,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:13:36,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409683156] [2022-07-22 13:13:36,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:36,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:13:36,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:13:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:13:36,912 INFO L87 Difference]: Start difference. First operand 292698 states and 309592 transitions. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 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) [2022-07-22 13:13:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:42,655 INFO L93 Difference]: Finished difference Result 656445 states and 694530 transitions. [2022-07-22 13:13:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:13:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 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 1057 [2022-07-22 13:13:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:43,175 INFO L225 Difference]: With dead ends: 656445 [2022-07-22 13:13:43,176 INFO L226 Difference]: Without dead ends: 366479 [2022-07-22 13:13:43,358 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 [2022-07-22 13:13:43,358 INFO L413 NwaCegarLoop]: 2464 mSDtfsCounter, 1250 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 4430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:43,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1250 Valid, 2621 Invalid, 4430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-22 13:13:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366479 states.