./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i --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/goblint-regression/28-race_reach_37-indirect_racing.i -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 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:33:59,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:33:59,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:33:59,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:33:59,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:33:59,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:33:59,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:33:59,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:33:59,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:33:59,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:33:59,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:33:59,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:33:59,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:33:59,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:33:59,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:33:59,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:33:59,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:33:59,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:33:59,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:33:59,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:33:59,282 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:33:59,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:33:59,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:33:59,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:33:59,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:33:59,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:33:59,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:33:59,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:33:59,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:33:59,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:33:59,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:33:59,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:33:59,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:33:59,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:33:59,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:33:59,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:33:59,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:33:59,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:33:59,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:33:59,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:33:59,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:33:59,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:33:59,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:33:59,333 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:33:59,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:33:59,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:33:59,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:33:59,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:33:59,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:33:59,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:33:59,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:33:59,336 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:33:59,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:33:59,337 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:33:59,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:33:59,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:33:59,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:33:59,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:33:59,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:33:59,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:33:59,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:33:59,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:33:59,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:33:59,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:33:59,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:33:59,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:33:59,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:33:59,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:33:59,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:33:59,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:33:59,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:33:59,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:33:59,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:33:59,341 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:33:59,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:33:59,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:33:59,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2022-07-22 21:33:59,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:33:59,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:33:59,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:33:59,590 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:33:59,591 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:33:59,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-07-22 21:33:59,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af83d6444/3ccec697283142768c6cf3405246cd71/FLAGc3204aa07 [2022-07-22 21:34:00,066 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:34:00,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-07-22 21:34:00,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af83d6444/3ccec697283142768c6cf3405246cd71/FLAGc3204aa07 [2022-07-22 21:34:00,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af83d6444/3ccec697283142768c6cf3405246cd71 [2022-07-22 21:34:00,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:34:00,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:34:00,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:00,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:34:00,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:34:00,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f0619e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00, skipping insertion in model container [2022-07-22 21:34:00,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:34:00,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:34:00,769 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/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-07-22 21:34:00,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:00,803 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:34:00,842 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/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-07-22 21:34:00,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:00,883 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:34:00,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00 WrapperNode [2022-07-22 21:34:00,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:00,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:00,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:34:00,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:34:00,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,937 INFO L137 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-07-22 21:34:00,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:00,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:34:00,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:34:00,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:34:00,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:34:00,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:34:00,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:34:00,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:34:00,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (1/1) ... [2022-07-22 21:34:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:00,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:00,987 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 21:34:00,989 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 21:34:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:34:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:34:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:34:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:34:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:34:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:34:01,018 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:34:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:34:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:34:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:34:01,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:34:01,020 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:34:01,121 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:34:01,123 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:34:01,332 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:34:01,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:34:01,339 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-22 21:34:01,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:01 BoogieIcfgContainer [2022-07-22 21:34:01,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:34:01,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:34:01,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:34:01,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:34:01,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:34:00" (1/3) ... [2022-07-22 21:34:01,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34414008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:01, skipping insertion in model container [2022-07-22 21:34:01,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:00" (2/3) ... [2022-07-22 21:34:01,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34414008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:01, skipping insertion in model container [2022-07-22 21:34:01,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:01" (3/3) ... [2022-07-22 21:34:01,363 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2022-07-22 21:34:01,372 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:34:01,381 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:34:01,381 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:34:01,381 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:34:01,455 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:34:01,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2022-07-22 21:34:01,553 INFO L129 PetriNetUnfolder]: 17/149 cut-off events. [2022-07-22 21:34:01,553 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:01,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 149 events. 17/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 357 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 72. Up to 6 conditions per place. [2022-07-22 21:34:01,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2022-07-22 21:34:01,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 223 flow [2022-07-22 21:34:01,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:01,585 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:01,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:01,602 INFO L129 PetriNetUnfolder]: 2/74 cut-off events. [2022-07-22 21:34:01,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:01,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:01,604 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:01,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1656258703, now seen corresponding path program 1 times [2022-07-22 21:34:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421013069] [2022-07-22 21:34:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:01,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:01,848 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 21:34:01,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421013069] [2022-07-22 21:34:01,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421013069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:01,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:01,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:01,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364255606] [2022-07-22 21:34:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:01,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:01,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:01,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 114 [2022-07-22 21:34:01,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 21:34:01,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:01,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 114 [2022-07-22 21:34:01,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:01,960 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2022-07-22 21:34:01,960 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:01,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 101 events. 0/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 22/120 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-22 21:34:01,962 INFO L132 encePairwiseOnDemand]: 100/114 looper letters, 8 selfloop transitions, 2 changer transitions 15/99 dead transitions. [2022-07-22 21:34:01,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 223 flow [2022-07-22 21:34:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2022-07-22 21:34:01,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9005847953216374 [2022-07-22 21:34:01,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2022-07-22 21:34:01,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2022-07-22 21:34:01,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:01,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2022-07-22 21:34:01,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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 21:34:01,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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 21:34:01,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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 21:34:01,997 INFO L186 Difference]: Start difference. First operand has 101 places, 109 transitions, 223 flow. Second operand 3 states and 308 transitions. [2022-07-22 21:34:01,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 223 flow [2022-07-22 21:34:02,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 99 transitions, 223 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:02,003 INFO L242 Difference]: Finished difference. Result has 103 places, 82 transitions, 177 flow [2022-07-22 21:34:02,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=103, PETRI_TRANSITIONS=82} [2022-07-22 21:34:02,008 INFO L279 CegarLoopForPetriNet]: 101 programPoint places, 2 predicate places. [2022-07-22 21:34:02,009 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 82 transitions, 177 flow [2022-07-22 21:34:02,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 21:34:02,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:02,010 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:34:02,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:34:02,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1881921463, now seen corresponding path program 1 times [2022-07-22 21:34:02,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454056653] [2022-07-22 21:34:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:02,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:02,059 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:02,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:02,108 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:02,109 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:02,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:02,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:34:02,112 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:34:02,115 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:02,115 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:34:02,138 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:34:02,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 148 transitions, 314 flow [2022-07-22 21:34:02,185 INFO L129 PetriNetUnfolder]: 31/243 cut-off events. [2022-07-22 21:34:02,186 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:34:02,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 31/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 721 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-07-22 21:34:02,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 148 transitions, 314 flow [2022-07-22 21:34:02,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 148 transitions, 314 flow [2022-07-22 21:34:02,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:02,194 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:02,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:02,203 INFO L129 PetriNetUnfolder]: 4/79 cut-off events. [2022-07-22 21:34:02,203 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:02,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:02,204 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:02,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1865005030, now seen corresponding path program 1 times [2022-07-22 21:34:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466226780] [2022-07-22 21:34:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:02,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:02,293 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 21:34:02,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466226780] [2022-07-22 21:34:02,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466226780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:02,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:02,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:02,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112460315] [2022-07-22 21:34:02,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:02,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:02,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:02,299 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 148 [2022-07-22 21:34:02,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 148 transitions, 314 flow. Second operand has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 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 21:34:02,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:02,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 148 [2022-07-22 21:34:02,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:02,363 INFO L129 PetriNetUnfolder]: 3/212 cut-off events. [2022-07-22 21:34:02,363 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-22 21:34:02,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 212 events. 3/212 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 532 event pairs, 0 based on Foata normal form. 42/244 useless extension candidates. Maximal degree in co-relation 135. Up to 7 conditions per place. [2022-07-22 21:34:02,366 INFO L132 encePairwiseOnDemand]: 131/148 looper letters, 2 selfloop transitions, 0 changer transitions 21/130 dead transitions. [2022-07-22 21:34:02,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 286 flow [2022-07-22 21:34:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-07-22 21:34:02,371 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9222972972972973 [2022-07-22 21:34:02,371 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-07-22 21:34:02,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-07-22 21:34:02,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:02,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-07-22 21:34:02,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 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 21:34:02,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 21:34:02,378 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 21:34:02,379 INFO L186 Difference]: Start difference. First operand has 134 places, 148 transitions, 314 flow. Second operand 2 states and 273 transitions. [2022-07-22 21:34:02,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 286 flow [2022-07-22 21:34:02,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 130 transitions, 286 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:02,384 INFO L242 Difference]: Finished difference. Result has 134 places, 109 transitions, 230 flow [2022-07-22 21:34:02,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=134, PETRI_TRANSITIONS=109} [2022-07-22 21:34:02,385 INFO L279 CegarLoopForPetriNet]: 134 programPoint places, 0 predicate places. [2022-07-22 21:34:02,385 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 109 transitions, 230 flow [2022-07-22 21:34:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 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 21:34:02,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:02,386 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:34:02,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1668491525, now seen corresponding path program 1 times [2022-07-22 21:34:02,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:02,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73688764] [2022-07-22 21:34:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:02,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:02,448 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 21:34:02,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:02,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73688764] [2022-07-22 21:34:02,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73688764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:02,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:02,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:02,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267746457] [2022-07-22 21:34:02,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:02,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:02,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:02,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 148 [2022-07-22 21:34:02,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 109 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 21:34:02,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:02,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 148 [2022-07-22 21:34:02,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:02,481 INFO L129 PetriNetUnfolder]: 0/132 cut-off events. [2022-07-22 21:34:02,482 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:34:02,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 132 events. 0/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 191 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-22 21:34:02,483 INFO L132 encePairwiseOnDemand]: 145/148 looper letters, 11 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2022-07-22 21:34:02,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 113 transitions, 264 flow [2022-07-22 21:34:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2022-07-22 21:34:02,485 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8355855855855856 [2022-07-22 21:34:02,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2022-07-22 21:34:02,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2022-07-22 21:34:02,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:02,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2022-07-22 21:34:02,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 21:34:02,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 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 21:34:02,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 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 21:34:02,495 INFO L186 Difference]: Start difference. First operand has 134 places, 109 transitions, 230 flow. Second operand 3 states and 371 transitions. [2022-07-22 21:34:02,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 113 transitions, 264 flow [2022-07-22 21:34:02,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 113 transitions, 262 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:02,502 INFO L242 Difference]: Finished difference. Result has 118 places, 110 transitions, 240 flow [2022-07-22 21:34:02,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=118, PETRI_TRANSITIONS=110} [2022-07-22 21:34:02,505 INFO L279 CegarLoopForPetriNet]: 134 programPoint places, -16 predicate places. [2022-07-22 21:34:02,506 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 110 transitions, 240 flow [2022-07-22 21:34:02,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 21:34:02,506 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:02,507 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:02,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:34:02,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:02,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1178735508, now seen corresponding path program 1 times [2022-07-22 21:34:02,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:02,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57233096] [2022-07-22 21:34:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:02,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:02,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:02,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57233096] [2022-07-22 21:34:02,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57233096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:02,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951744608] [2022-07-22 21:34:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:02,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:02,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:02,595 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 21:34:02,618 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 21:34:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:02,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:02,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:02,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951744608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:02,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:02,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:02,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944409782] [2022-07-22 21:34:02,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:02,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:02,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:02,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:02,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:02,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 148 [2022-07-22 21:34:02,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 110 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 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 21:34:02,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:02,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 148 [2022-07-22 21:34:02,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:02,999 INFO L129 PetriNetUnfolder]: 0/112 cut-off events. [2022-07-22 21:34:02,999 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:34:02,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 0/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/114 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-22 21:34:03,000 INFO L132 encePairwiseOnDemand]: 143/148 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-07-22 21:34:03,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 262 flow [2022-07-22 21:34:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1080 transitions. [2022-07-22 21:34:03,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8108108108108109 [2022-07-22 21:34:03,005 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1080 transitions. [2022-07-22 21:34:03,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1080 transitions. [2022-07-22 21:34:03,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:03,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1080 transitions. [2022-07-22 21:34:03,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.0) internal successors, (1080), 9 states have internal predecessors, (1080), 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 21:34:03,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 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 21:34:03,012 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 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 21:34:03,012 INFO L186 Difference]: Start difference. First operand has 118 places, 110 transitions, 240 flow. Second operand 9 states and 1080 transitions. [2022-07-22 21:34:03,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 262 flow [2022-07-22 21:34:03,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 106 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:03,019 INFO L242 Difference]: Finished difference. Result has 115 places, 102 transitions, 234 flow [2022-07-22 21:34:03,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2022-07-22 21:34:03,021 INFO L279 CegarLoopForPetriNet]: 134 programPoint places, -19 predicate places. [2022-07-22 21:34:03,021 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 234 flow [2022-07-22 21:34:03,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 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 21:34:03,022 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:03,022 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:03,050 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 21:34:03,231 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 21:34:03,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1979046043, now seen corresponding path program 1 times [2022-07-22 21:34:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:03,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694395434] [2022-07-22 21:34:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:03,268 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:03,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:03,294 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:03,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:03,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:03,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:34:03,295 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:34:03,296 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:03,296 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:34:03,316 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:34:03,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 163 places, 182 transitions, 394 flow [2022-07-22 21:34:03,374 INFO L129 PetriNetUnfolder]: 50/370 cut-off events. [2022-07-22 21:34:03,374 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:34:03,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 370 events. 50/370 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1251 event pairs, 1 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 251. Up to 16 conditions per place. [2022-07-22 21:34:03,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 182 transitions, 394 flow [2022-07-22 21:34:03,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 182 transitions, 394 flow [2022-07-22 21:34:03,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:03,386 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:03,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:03,392 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2022-07-22 21:34:03,392 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:03,393 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:03,393 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:03,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1788177093, now seen corresponding path program 1 times [2022-07-22 21:34:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:03,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422250908] [2022-07-22 21:34:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:03,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:03,449 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 21:34:03,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:03,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422250908] [2022-07-22 21:34:03,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422250908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:03,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:03,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:03,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976687645] [2022-07-22 21:34:03,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:03,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:03,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:03,454 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 182 [2022-07-22 21:34:03,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 182 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 21:34:03,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:03,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 182 [2022-07-22 21:34:03,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:03,530 INFO L129 PetriNetUnfolder]: 7/308 cut-off events. [2022-07-22 21:34:03,530 INFO L130 PetriNetUnfolder]: For 43/80 co-relation queries the response was YES. [2022-07-22 21:34:03,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 308 events. 7/308 cut-off events. For 43/80 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 920 event pairs, 1 based on Foata normal form. 193/487 useless extension candidates. Maximal degree in co-relation 224. Up to 30 conditions per place. [2022-07-22 21:34:03,533 INFO L132 encePairwiseOnDemand]: 156/182 looper letters, 12 selfloop transitions, 2 changer transitions 22/162 dead transitions. [2022-07-22 21:34:03,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 162 transitions, 388 flow [2022-07-22 21:34:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-07-22 21:34:03,535 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8846153846153846 [2022-07-22 21:34:03,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-07-22 21:34:03,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-07-22 21:34:03,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:03,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-07-22 21:34:03,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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 21:34:03,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 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 21:34:03,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 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 21:34:03,541 INFO L186 Difference]: Start difference. First operand has 163 places, 182 transitions, 394 flow. Second operand 3 states and 483 transitions. [2022-07-22 21:34:03,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 162 transitions, 388 flow [2022-07-22 21:34:03,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 162 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:03,547 INFO L242 Difference]: Finished difference. Result has 165 places, 137 transitions, 305 flow [2022-07-22 21:34:03,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=165, PETRI_TRANSITIONS=137} [2022-07-22 21:34:03,549 INFO L279 CegarLoopForPetriNet]: 163 programPoint places, 2 predicate places. [2022-07-22 21:34:03,552 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 137 transitions, 305 flow [2022-07-22 21:34:03,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 21:34:03,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:03,553 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:34:03,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:03,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:03,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1863745046, now seen corresponding path program 1 times [2022-07-22 21:34:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139541188] [2022-07-22 21:34:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:03,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:03,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139541188] [2022-07-22 21:34:03,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139541188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837848318] [2022-07-22 21:34:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:03,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:03,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:03,624 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 21:34:03,625 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 21:34:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:03,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:03,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:03,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:03,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837848318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:03,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:03,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367286748] [2022-07-22 21:34:03,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:03,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:03,797 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 182 [2022-07-22 21:34:03,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 137 transitions, 305 flow. Second operand has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 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 21:34:03,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:03,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 182 [2022-07-22 21:34:03,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:03,900 INFO L129 PetriNetUnfolder]: 0/158 cut-off events. [2022-07-22 21:34:03,901 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:34:03,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 158 events. 0/158 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 239 event pairs, 0 based on Foata normal form. 2/160 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-22 21:34:03,902 INFO L132 encePairwiseOnDemand]: 176/182 looper letters, 13 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2022-07-22 21:34:03,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 147 transitions, 371 flow [2022-07-22 21:34:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1320 transitions. [2022-07-22 21:34:03,906 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8058608058608059 [2022-07-22 21:34:03,906 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1320 transitions. [2022-07-22 21:34:03,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1320 transitions. [2022-07-22 21:34:03,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:03,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1320 transitions. [2022-07-22 21:34:03,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.66666666666666) internal successors, (1320), 9 states have internal predecessors, (1320), 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 21:34:03,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 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 21:34:03,915 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 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 21:34:03,915 INFO L186 Difference]: Start difference. First operand has 165 places, 137 transitions, 305 flow. Second operand 9 states and 1320 transitions. [2022-07-22 21:34:03,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 147 transitions, 371 flow [2022-07-22 21:34:03,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 147 transitions, 363 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:03,920 INFO L242 Difference]: Finished difference. Result has 156 places, 143 transitions, 347 flow [2022-07-22 21:34:03,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=156, PETRI_TRANSITIONS=143} [2022-07-22 21:34:03,921 INFO L279 CegarLoopForPetriNet]: 163 programPoint places, -7 predicate places. [2022-07-22 21:34:03,921 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 347 flow [2022-07-22 21:34:03,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 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 21:34:03,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:03,924 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:03,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:04,139 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,SelfDestructingSolverStorable7 [2022-07-22 21:34:04,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:04,140 INFO L85 PathProgramCache]: Analyzing trace with hash -806067410, now seen corresponding path program 1 times [2022-07-22 21:34:04,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:04,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71073964] [2022-07-22 21:34:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:04,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:04,172 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:04,209 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:04,210 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:04,210 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:04,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:04,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:34:04,211 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:34:04,211 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:04,212 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:34:04,232 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:34:04,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 192 places, 216 transitions, 476 flow [2022-07-22 21:34:04,299 INFO L129 PetriNetUnfolder]: 81/565 cut-off events. [2022-07-22 21:34:04,299 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-22 21:34:04,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 565 events. 81/565 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2144 event pairs, 6 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 390. Up to 32 conditions per place. [2022-07-22 21:34:04,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 216 transitions, 476 flow [2022-07-22 21:34:04,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 216 transitions, 476 flow [2022-07-22 21:34:04,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:04,317 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:04,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:04,323 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-22 21:34:04,323 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:04,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:04,323 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:04,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash 858637331, now seen corresponding path program 1 times [2022-07-22 21:34:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:04,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284650494] [2022-07-22 21:34:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:04,349 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 21:34:04,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:04,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284650494] [2022-07-22 21:34:04,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284650494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:04,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001622639] [2022-07-22 21:34:04,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:04,367 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 216 [2022-07-22 21:34:04,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 216 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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 21:34:04,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:04,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 216 [2022-07-22 21:34:04,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:04,461 INFO L129 PetriNetUnfolder]: 20/484 cut-off events. [2022-07-22 21:34:04,461 INFO L130 PetriNetUnfolder]: For 156/297 co-relation queries the response was YES. [2022-07-22 21:34:04,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 484 events. 20/484 cut-off events. For 156/297 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1893 event pairs, 6 based on Foata normal form. 422/882 useless extension candidates. Maximal degree in co-relation 362. Up to 56 conditions per place. [2022-07-22 21:34:04,467 INFO L132 encePairwiseOnDemand]: 184/216 looper letters, 13 selfloop transitions, 2 changer transitions 23/190 dead transitions. [2022-07-22 21:34:04,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 190 transitions, 462 flow [2022-07-22 21:34:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2022-07-22 21:34:04,469 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8780864197530864 [2022-07-22 21:34:04,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2022-07-22 21:34:04,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2022-07-22 21:34:04,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:04,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2022-07-22 21:34:04,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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 21:34:04,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 21:34:04,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 21:34:04,473 INFO L186 Difference]: Start difference. First operand has 192 places, 216 transitions, 476 flow. Second operand 3 states and 569 transitions. [2022-07-22 21:34:04,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 190 transitions, 462 flow [2022-07-22 21:34:04,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 190 transitions, 462 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:04,477 INFO L242 Difference]: Finished difference. Result has 194 places, 164 transitions, 370 flow [2022-07-22 21:34:04,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=194, PETRI_TRANSITIONS=164} [2022-07-22 21:34:04,478 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 2 predicate places. [2022-07-22 21:34:04,478 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 164 transitions, 370 flow [2022-07-22 21:34:04,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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 21:34:04,479 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:04,479 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:04,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:34:04,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash -15546974, now seen corresponding path program 1 times [2022-07-22 21:34:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81419085] [2022-07-22 21:34:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81419085] [2022-07-22 21:34:04,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81419085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:04,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940581709] [2022-07-22 21:34:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:04,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:04,516 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 21:34:04,546 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 21:34:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:04,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:04,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940581709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:04,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:04,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817183440] [2022-07-22 21:34:04,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:04,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:04,690 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 216 [2022-07-22 21:34:04,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 164 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 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 21:34:04,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:04,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 216 [2022-07-22 21:34:04,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:04,792 INFO L129 PetriNetUnfolder]: 0/204 cut-off events. [2022-07-22 21:34:04,792 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:34:04,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 204 events. 0/204 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 399 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-22 21:34:04,793 INFO L132 encePairwiseOnDemand]: 210/216 looper letters, 14 selfloop transitions, 9 changer transitions 0/174 dead transitions. [2022-07-22 21:34:04,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 174 transitions, 438 flow [2022-07-22 21:34:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1555 transitions. [2022-07-22 21:34:04,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7998971193415638 [2022-07-22 21:34:04,797 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1555 transitions. [2022-07-22 21:34:04,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1555 transitions. [2022-07-22 21:34:04,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:04,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1555 transitions. [2022-07-22 21:34:04,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.77777777777777) internal successors, (1555), 9 states have internal predecessors, (1555), 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 21:34:04,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 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 21:34:04,806 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 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 21:34:04,806 INFO L186 Difference]: Start difference. First operand has 194 places, 164 transitions, 370 flow. Second operand 9 states and 1555 transitions. [2022-07-22 21:34:04,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 174 transitions, 438 flow [2022-07-22 21:34:04,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 174 transitions, 424 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:04,809 INFO L242 Difference]: Finished difference. Result has 185 places, 170 transitions, 406 flow [2022-07-22 21:34:04,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=185, PETRI_TRANSITIONS=170} [2022-07-22 21:34:04,810 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, -7 predicate places. [2022-07-22 21:34:04,811 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 170 transitions, 406 flow [2022-07-22 21:34:04,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 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 21:34:04,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:04,812 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:04,841 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 21:34:05,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:05,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:05,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1341330269, now seen corresponding path program 1 times [2022-07-22 21:34:05,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:05,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91464148] [2022-07-22 21:34:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:05,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:05,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:05,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91464148] [2022-07-22 21:34:05,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91464148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:05,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311119925] [2022-07-22 21:34:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:05,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:05,116 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 21:34:05,119 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 21:34:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:05,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:05,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311119925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:05,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:05,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517259508] [2022-07-22 21:34:05,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:05,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 216 [2022-07-22 21:34:05,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 170 transitions, 406 flow. Second operand has 18 states, 18 states have (on average 172.61111111111111) internal successors, (3107), 18 states have internal predecessors, (3107), 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 21:34:05,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:05,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 216 [2022-07-22 21:34:05,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:05,526 INFO L129 PetriNetUnfolder]: 0/184 cut-off events. [2022-07-22 21:34:05,526 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-22 21:34:05,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 184 events. 0/184 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-22 21:34:05,527 INFO L132 encePairwiseOnDemand]: 211/216 looper letters, 15 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2022-07-22 21:34:05,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 170 transitions, 474 flow [2022-07-22 21:34:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:34:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:34:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2580 transitions. [2022-07-22 21:34:05,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962962962962963 [2022-07-22 21:34:05,533 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2580 transitions. [2022-07-22 21:34:05,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2580 transitions. [2022-07-22 21:34:05,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:05,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2580 transitions. [2022-07-22 21:34:05,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 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 21:34:05,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 216.0) internal successors, (3456), 16 states have internal predecessors, (3456), 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 21:34:05,546 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 216.0) internal successors, (3456), 16 states have internal predecessors, (3456), 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 21:34:05,547 INFO L186 Difference]: Start difference. First operand has 185 places, 170 transitions, 406 flow. Second operand 15 states and 2580 transitions. [2022-07-22 21:34:05,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 170 transitions, 474 flow [2022-07-22 21:34:05,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 170 transitions, 457 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-22 21:34:05,568 INFO L242 Difference]: Finished difference. Result has 185 places, 163 transitions, 406 flow [2022-07-22 21:34:05,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=406, PETRI_PLACES=185, PETRI_TRANSITIONS=163} [2022-07-22 21:34:05,570 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, -7 predicate places. [2022-07-22 21:34:05,570 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 163 transitions, 406 flow [2022-07-22 21:34:05,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 172.61111111111111) internal successors, (3107), 18 states have internal predecessors, (3107), 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 21:34:05,572 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:05,572 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:05,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:05,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:05,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash -291249534, now seen corresponding path program 1 times [2022-07-22 21:34:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514581768] [2022-07-22 21:34:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:05,803 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:05,839 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:05,839 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:05,840 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:05,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:05,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:34:05,841 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:34:05,842 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:05,842 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:34:05,874 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-22 21:34:05,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 250 transitions, 560 flow [2022-07-22 21:34:05,999 INFO L129 PetriNetUnfolder]: 140/900 cut-off events. [2022-07-22 21:34:05,999 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-22 21:34:06,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 140/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4096 event pairs, 23 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 610. Up to 80 conditions per place. [2022-07-22 21:34:06,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 250 transitions, 560 flow [2022-07-22 21:34:06,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 250 transitions, 560 flow [2022-07-22 21:34:06,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:06,027 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:06,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:06,031 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-22 21:34:06,032 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:06,032 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:06,032 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:06,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:06,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1019000205, now seen corresponding path program 1 times [2022-07-22 21:34:06,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:06,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435475885] [2022-07-22 21:34:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:06,053 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 21:34:06,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:06,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435475885] [2022-07-22 21:34:06,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435475885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:06,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:06,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556683961] [2022-07-22 21:34:06,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:06,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:06,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:06,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 250 [2022-07-22 21:34:06,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 250 transitions, 560 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 21:34:06,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:06,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 250 [2022-07-22 21:34:06,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:06,218 INFO L129 PetriNetUnfolder]: 53/792 cut-off events. [2022-07-22 21:34:06,218 INFO L130 PetriNetUnfolder]: For 288/388 co-relation queries the response was YES. [2022-07-22 21:34:06,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1018 conditions, 792 events. 53/792 cut-off events. For 288/388 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3706 event pairs, 23 based on Foata normal form. 863/1613 useless extension candidates. Maximal degree in co-relation 589. Up to 110 conditions per place. [2022-07-22 21:34:06,228 INFO L132 encePairwiseOnDemand]: 212/250 looper letters, 14 selfloop transitions, 2 changer transitions 24/218 dead transitions. [2022-07-22 21:34:06,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 218 transitions, 538 flow [2022-07-22 21:34:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2022-07-22 21:34:06,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2022-07-22 21:34:06,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2022-07-22 21:34:06,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2022-07-22 21:34:06,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:06,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2022-07-22 21:34:06,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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 21:34:06,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 21:34:06,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 21:34:06,234 INFO L186 Difference]: Start difference. First operand has 221 places, 250 transitions, 560 flow. Second operand 3 states and 655 transitions. [2022-07-22 21:34:06,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 218 transitions, 538 flow [2022-07-22 21:34:06,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 218 transitions, 538 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:06,238 INFO L242 Difference]: Finished difference. Result has 223 places, 191 transitions, 437 flow [2022-07-22 21:34:06,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=437, PETRI_PLACES=223, PETRI_TRANSITIONS=191} [2022-07-22 21:34:06,243 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 2 predicate places. [2022-07-22 21:34:06,243 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 191 transitions, 437 flow [2022-07-22 21:34:06,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 21:34:06,244 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:06,244 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:06,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:34:06,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1866604868, now seen corresponding path program 1 times [2022-07-22 21:34:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:06,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144730055] [2022-07-22 21:34:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:06,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144730055] [2022-07-22 21:34:06,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144730055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064265151] [2022-07-22 21:34:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:06,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:06,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:06,279 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 21:34:06,280 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 21:34:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:06,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:06,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064265151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:06,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:06,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:06,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039083295] [2022-07-22 21:34:06,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:06,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:06,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:06,435 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 250 [2022-07-22 21:34:06,437 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 191 transitions, 437 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 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 21:34:06,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:06,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 250 [2022-07-22 21:34:06,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:06,534 INFO L129 PetriNetUnfolder]: 0/250 cut-off events. [2022-07-22 21:34:06,534 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-22 21:34:06,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 250 events. 0/250 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 563 event pairs, 0 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:34:06,536 INFO L132 encePairwiseOnDemand]: 244/250 looper letters, 15 selfloop transitions, 9 changer transitions 0/201 dead transitions. [2022-07-22 21:34:06,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 201 transitions, 507 flow [2022-07-22 21:34:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1790 transitions. [2022-07-22 21:34:06,540 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7955555555555556 [2022-07-22 21:34:06,540 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1790 transitions. [2022-07-22 21:34:06,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1790 transitions. [2022-07-22 21:34:06,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:06,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1790 transitions. [2022-07-22 21:34:06,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.88888888888889) internal successors, (1790), 9 states have internal predecessors, (1790), 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 21:34:06,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 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 21:34:06,549 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 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 21:34:06,549 INFO L186 Difference]: Start difference. First operand has 223 places, 191 transitions, 437 flow. Second operand 9 states and 1790 transitions. [2022-07-22 21:34:06,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 201 transitions, 507 flow [2022-07-22 21:34:06,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 201 transitions, 485 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:06,553 INFO L242 Difference]: Finished difference. Result has 214 places, 197 transitions, 465 flow [2022-07-22 21:34:06,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=214, PETRI_TRANSITIONS=197} [2022-07-22 21:34:06,554 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, -7 predicate places. [2022-07-22 21:34:06,554 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 197 transitions, 465 flow [2022-07-22 21:34:06,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 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 21:34:06,555 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:06,555 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:06,582 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 21:34:06,780 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,SelfDestructingSolverStorable14 [2022-07-22 21:34:06,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1812030391, now seen corresponding path program 1 times [2022-07-22 21:34:06,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383029424] [2022-07-22 21:34:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:06,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:06,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:06,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383029424] [2022-07-22 21:34:06,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383029424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:06,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393717113] [2022-07-22 21:34:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:06,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:06,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:06,852 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 21:34:06,853 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 21:34:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:06,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:07,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:07,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393717113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:07,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:07,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257581080] [2022-07-22 21:34:07,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:07,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:07,114 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 250 [2022-07-22 21:34:07,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 197 transitions, 465 flow. Second operand has 18 states, 18 states have (on average 198.61111111111111) internal successors, (3575), 18 states have internal predecessors, (3575), 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 21:34:07,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:07,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 250 [2022-07-22 21:34:07,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:07,284 INFO L129 PetriNetUnfolder]: 0/220 cut-off events. [2022-07-22 21:34:07,284 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-22 21:34:07,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 220 events. 0/220 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-22 21:34:07,285 INFO L132 encePairwiseOnDemand]: 245/250 looper letters, 18 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2022-07-22 21:34:07,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 202 transitions, 569 flow [2022-07-22 21:34:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:34:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:34:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3565 transitions. [2022-07-22 21:34:07,293 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922222222222223 [2022-07-22 21:34:07,293 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3565 transitions. [2022-07-22 21:34:07,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3565 transitions. [2022-07-22 21:34:07,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:07,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3565 transitions. [2022-07-22 21:34:07,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.05555555555554) internal successors, (3565), 18 states have internal predecessors, (3565), 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 21:34:07,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 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 21:34:07,309 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 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 21:34:07,310 INFO L186 Difference]: Start difference. First operand has 214 places, 197 transitions, 465 flow. Second operand 18 states and 3565 transitions. [2022-07-22 21:34:07,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 202 transitions, 569 flow [2022-07-22 21:34:07,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 202 transitions, 548 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-22 21:34:07,314 INFO L242 Difference]: Finished difference. Result has 217 places, 193 transitions, 484 flow [2022-07-22 21:34:07,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=484, PETRI_PLACES=217, PETRI_TRANSITIONS=193} [2022-07-22 21:34:07,315 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, -4 predicate places. [2022-07-22 21:34:07,316 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 193 transitions, 484 flow [2022-07-22 21:34:07,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 198.61111111111111) internal successors, (3575), 18 states have internal predecessors, (3575), 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 21:34:07,317 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:07,317 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:07,347 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 21:34:07,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 21:34:07,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:07,540 INFO L85 PathProgramCache]: Analyzing trace with hash 309502231, now seen corresponding path program 1 times [2022-07-22 21:34:07,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:07,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620471274] [2022-07-22 21:34:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:07,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:07,569 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:07,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:07,595 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:07,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:07,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:07,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:34:07,596 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:34:07,597 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:07,597 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:34:07,623 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-22 21:34:07,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 250 places, 284 transitions, 646 flow [2022-07-22 21:34:07,875 INFO L129 PetriNetUnfolder]: 263/1523 cut-off events. [2022-07-22 21:34:07,875 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-22 21:34:07,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 1523 events. 263/1523 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8553 event pairs, 72 based on Foata normal form. 0/1317 useless extension candidates. Maximal degree in co-relation 999. Up to 192 conditions per place. [2022-07-22 21:34:07,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 284 transitions, 646 flow [2022-07-22 21:34:07,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 284 transitions, 646 flow [2022-07-22 21:34:07,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:07,916 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:07,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:07,920 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-22 21:34:07,920 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:07,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:07,921 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:07,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1307088471, now seen corresponding path program 1 times [2022-07-22 21:34:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431350908] [2022-07-22 21:34:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:07,942 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 21:34:07,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431350908] [2022-07-22 21:34:07,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431350908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:07,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:07,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:07,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182238990] [2022-07-22 21:34:07,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:07,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:07,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:07,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:07,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 284 [2022-07-22 21:34:07,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 284 transitions, 646 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 21:34:07,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:07,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 284 [2022-07-22 21:34:07,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:08,243 INFO L129 PetriNetUnfolder]: 134/1372 cut-off events. [2022-07-22 21:34:08,243 INFO L130 PetriNetUnfolder]: For 708/954 co-relation queries the response was YES. [2022-07-22 21:34:08,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1837 conditions, 1372 events. 134/1372 cut-off events. For 708/954 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8135 event pairs, 72 based on Foata normal form. 1739/3035 useless extension candidates. Maximal degree in co-relation 1005. Up to 228 conditions per place. [2022-07-22 21:34:08,263 INFO L132 encePairwiseOnDemand]: 240/284 looper letters, 15 selfloop transitions, 2 changer transitions 25/246 dead transitions. [2022-07-22 21:34:08,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 246 transitions, 616 flow [2022-07-22 21:34:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 741 transitions. [2022-07-22 21:34:08,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8697183098591549 [2022-07-22 21:34:08,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 741 transitions. [2022-07-22 21:34:08,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 741 transitions. [2022-07-22 21:34:08,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:08,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 741 transitions. [2022-07-22 21:34:08,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 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 21:34:08,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 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 21:34:08,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 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 21:34:08,269 INFO L186 Difference]: Start difference. First operand has 250 places, 284 transitions, 646 flow. Second operand 3 states and 741 transitions. [2022-07-22 21:34:08,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 246 transitions, 616 flow [2022-07-22 21:34:08,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 246 transitions, 616 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:08,303 INFO L242 Difference]: Finished difference. Result has 252 places, 218 transitions, 506 flow [2022-07-22 21:34:08,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=506, PETRI_PLACES=252, PETRI_TRANSITIONS=218} [2022-07-22 21:34:08,305 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, 2 predicate places. [2022-07-22 21:34:08,305 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 218 transitions, 506 flow [2022-07-22 21:34:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 21:34:08,306 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:08,306 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:08,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:34:08,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1173015864, now seen corresponding path program 1 times [2022-07-22 21:34:08,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:08,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848546854] [2022-07-22 21:34:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848546854] [2022-07-22 21:34:08,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848546854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055614362] [2022-07-22 21:34:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:08,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:08,348 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:08,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:34:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:08,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055614362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:08,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:08,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:08,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980169835] [2022-07-22 21:34:08,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:08,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:08,514 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 284 [2022-07-22 21:34:08,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 218 transitions, 506 flow. Second operand has 10 states, 10 states have (on average 224.3) internal successors, (2243), 10 states have internal predecessors, (2243), 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 21:34:08,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:08,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 284 [2022-07-22 21:34:08,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:08,637 INFO L129 PetriNetUnfolder]: 0/296 cut-off events. [2022-07-22 21:34:08,638 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-22 21:34:08,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 296 events. 0/296 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 725 event pairs, 0 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-22 21:34:08,639 INFO L132 encePairwiseOnDemand]: 278/284 looper letters, 16 selfloop transitions, 9 changer transitions 0/228 dead transitions. [2022-07-22 21:34:08,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 228 transitions, 578 flow [2022-07-22 21:34:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2025 transitions. [2022-07-22 21:34:08,643 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922535211267606 [2022-07-22 21:34:08,644 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2025 transitions. [2022-07-22 21:34:08,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2025 transitions. [2022-07-22 21:34:08,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:08,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2025 transitions. [2022-07-22 21:34:08,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 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 21:34:08,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 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 21:34:08,653 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 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 21:34:08,653 INFO L186 Difference]: Start difference. First operand has 252 places, 218 transitions, 506 flow. Second operand 9 states and 2025 transitions. [2022-07-22 21:34:08,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 228 transitions, 578 flow [2022-07-22 21:34:08,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 228 transitions, 546 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:08,657 INFO L242 Difference]: Finished difference. Result has 243 places, 224 transitions, 524 flow [2022-07-22 21:34:08,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=524, PETRI_PLACES=243, PETRI_TRANSITIONS=224} [2022-07-22 21:34:08,658 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -7 predicate places. [2022-07-22 21:34:08,659 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 224 transitions, 524 flow [2022-07-22 21:34:08,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 224.3) internal successors, (2243), 10 states have internal predecessors, (2243), 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 21:34:08,659 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:08,660 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:08,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:08,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:08,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1821400819, now seen corresponding path program 1 times [2022-07-22 21:34:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:08,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544956609] [2022-07-22 21:34:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:08,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544956609] [2022-07-22 21:34:08,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544956609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:08,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980112583] [2022-07-22 21:34:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:08,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:08,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:34:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980112583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:09,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:09,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468683816] [2022-07-22 21:34:09,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:09,209 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 284 [2022-07-22 21:34:09,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 224 transitions, 524 flow. Second operand has 18 states, 18 states have (on average 224.61111111111111) internal successors, (4043), 18 states have internal predecessors, (4043), 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 21:34:09,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:09,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 284 [2022-07-22 21:34:09,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:09,416 INFO L129 PetriNetUnfolder]: 0/256 cut-off events. [2022-07-22 21:34:09,416 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:34:09,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 256 events. 0/256 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/260 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-22 21:34:09,417 INFO L132 encePairwiseOnDemand]: 279/284 looper letters, 21 selfloop transitions, 19 changer transitions 0/234 dead transitions. [2022-07-22 21:34:09,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 234 transitions, 664 flow [2022-07-22 21:34:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4706 transitions. [2022-07-22 21:34:09,424 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7890677397719651 [2022-07-22 21:34:09,424 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4706 transitions. [2022-07-22 21:34:09,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4706 transitions. [2022-07-22 21:34:09,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:09,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4706 transitions. [2022-07-22 21:34:09,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 224.0952380952381) internal successors, (4706), 21 states have internal predecessors, (4706), 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 21:34:09,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 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 21:34:09,441 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 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 21:34:09,442 INFO L186 Difference]: Start difference. First operand has 243 places, 224 transitions, 524 flow. Second operand 21 states and 4706 transitions. [2022-07-22 21:34:09,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 234 transitions, 664 flow [2022-07-22 21:34:09,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 234 transitions, 639 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-22 21:34:09,447 INFO L242 Difference]: Finished difference. Result has 249 places, 223 transitions, 562 flow [2022-07-22 21:34:09,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=562, PETRI_PLACES=249, PETRI_TRANSITIONS=223} [2022-07-22 21:34:09,447 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -1 predicate places. [2022-07-22 21:34:09,448 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 223 transitions, 562 flow [2022-07-22 21:34:09,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 224.61111111111111) internal successors, (4043), 18 states have internal predecessors, (4043), 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 21:34:09,449 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:09,449 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:09,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:09,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:09,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1967318675, now seen corresponding path program 1 times [2022-07-22 21:34:09,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073354461] [2022-07-22 21:34:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:09,712 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:09,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:09,738 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:09,738 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:09,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:09,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:34:09,738 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:34:09,741 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:09,742 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-22 21:34:09,766 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-22 21:34:09,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 279 places, 318 transitions, 734 flow [2022-07-22 21:34:10,315 INFO L129 PetriNetUnfolder]: 530/2738 cut-off events. [2022-07-22 21:34:10,315 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-22 21:34:10,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3236 conditions, 2738 events. 530/2738 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18373 event pairs, 201 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 1741. Up to 448 conditions per place. [2022-07-22 21:34:10,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 318 transitions, 734 flow [2022-07-22 21:34:10,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 318 transitions, 734 flow [2022-07-22 21:34:10,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:10,397 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:10,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:10,402 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2022-07-22 21:34:10,402 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:10,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,403 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:10,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1824661401, now seen corresponding path program 1 times [2022-07-22 21:34:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037688163] [2022-07-22 21:34:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,422 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 21:34:10,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:10,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037688163] [2022-07-22 21:34:10,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037688163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:10,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:10,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:10,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257131133] [2022-07-22 21:34:10,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:10,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:10,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:10,425 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 318 [2022-07-22 21:34:10,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 318 transitions, 734 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 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 21:34:10,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:10,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 318 [2022-07-22 21:34:10,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:11,040 INFO L129 PetriNetUnfolder]: 327/2512 cut-off events. [2022-07-22 21:34:11,040 INFO L130 PetriNetUnfolder]: For 1437/1578 co-relation queries the response was YES. [2022-07-22 21:34:11,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3505 conditions, 2512 events. 327/2512 cut-off events. For 1437/1578 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 17903 event pairs, 201 based on Foata normal form. 3549/5919 useless extension candidates. Maximal degree in co-relation 1823. Up to 490 conditions per place. [2022-07-22 21:34:11,069 INFO L132 encePairwiseOnDemand]: 268/318 looper letters, 16 selfloop transitions, 2 changer transitions 26/274 dead transitions. [2022-07-22 21:34:11,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 274 transitions, 696 flow [2022-07-22 21:34:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2022-07-22 21:34:11,071 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8668763102725366 [2022-07-22 21:34:11,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2022-07-22 21:34:11,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2022-07-22 21:34:11,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:11,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2022-07-22 21:34:11,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 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 21:34:11,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 21:34:11,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 21:34:11,074 INFO L186 Difference]: Start difference. First operand has 279 places, 318 transitions, 734 flow. Second operand 3 states and 827 transitions. [2022-07-22 21:34:11,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 274 transitions, 696 flow [2022-07-22 21:34:11,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 274 transitions, 696 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:11,080 INFO L242 Difference]: Finished difference. Result has 281 places, 245 transitions, 577 flow [2022-07-22 21:34:11,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=577, PETRI_PLACES=281, PETRI_TRANSITIONS=245} [2022-07-22 21:34:11,081 INFO L279 CegarLoopForPetriNet]: 279 programPoint places, 2 predicate places. [2022-07-22 21:34:11,081 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 245 transitions, 577 flow [2022-07-22 21:34:11,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 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 21:34:11,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:11,081 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:11,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:34:11,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash 513380630, now seen corresponding path program 1 times [2022-07-22 21:34:11,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:11,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329131852] [2022-07-22 21:34:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:11,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:11,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329131852] [2022-07-22 21:34:11,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329131852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:11,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914671792] [2022-07-22 21:34:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:11,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:11,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:11,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:11,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:34:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:11,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914671792] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:11,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:11,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:11,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442845152] [2022-07-22 21:34:11,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:11,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:11,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 318 [2022-07-22 21:34:11,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 245 transitions, 577 flow. Second operand has 10 states, 10 states have (on average 250.3) internal successors, (2503), 10 states have internal predecessors, (2503), 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 21:34:11,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:11,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 318 [2022-07-22 21:34:11,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:11,433 INFO L129 PetriNetUnfolder]: 0/342 cut-off events. [2022-07-22 21:34:11,433 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-07-22 21:34:11,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 342 events. 0/342 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 882 event pairs, 0 based on Foata normal form. 2/344 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-22 21:34:11,434 INFO L132 encePairwiseOnDemand]: 312/318 looper letters, 17 selfloop transitions, 9 changer transitions 0/255 dead transitions. [2022-07-22 21:34:11,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 255 transitions, 651 flow [2022-07-22 21:34:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2260 transitions. [2022-07-22 21:34:11,437 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7896575821104123 [2022-07-22 21:34:11,438 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2260 transitions. [2022-07-22 21:34:11,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2260 transitions. [2022-07-22 21:34:11,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:11,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2260 transitions. [2022-07-22 21:34:11,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 251.11111111111111) internal successors, (2260), 9 states have internal predecessors, (2260), 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 21:34:11,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 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 21:34:11,447 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 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 21:34:11,447 INFO L186 Difference]: Start difference. First operand has 281 places, 245 transitions, 577 flow. Second operand 9 states and 2260 transitions. [2022-07-22 21:34:11,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 255 transitions, 651 flow [2022-07-22 21:34:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 255 transitions, 607 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:11,452 INFO L242 Difference]: Finished difference. Result has 272 places, 251 transitions, 583 flow [2022-07-22 21:34:11,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=583, PETRI_PLACES=272, PETRI_TRANSITIONS=251} [2022-07-22 21:34:11,453 INFO L279 CegarLoopForPetriNet]: 279 programPoint places, -7 predicate places. [2022-07-22 21:34:11,454 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 251 transitions, 583 flow [2022-07-22 21:34:11,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.3) internal successors, (2503), 10 states have internal predecessors, (2503), 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 21:34:11,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:11,455 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:11,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:11,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:11,680 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1369441553, now seen corresponding path program 1 times [2022-07-22 21:34:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:11,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212136436] [2022-07-22 21:34:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:11,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:11,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212136436] [2022-07-22 21:34:11,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212136436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:11,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325879131] [2022-07-22 21:34:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:11,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:11,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:11,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:34:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:11,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325879131] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:11,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:11,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:11,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117103012] [2022-07-22 21:34:11,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:11,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:11,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:12,001 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 318 [2022-07-22 21:34:12,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 251 transitions, 583 flow. Second operand has 18 states, 18 states have (on average 250.61111111111111) internal successors, (4511), 18 states have internal predecessors, (4511), 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 21:34:12,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:12,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 318 [2022-07-22 21:34:12,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:12,269 INFO L129 PetriNetUnfolder]: 0/302 cut-off events. [2022-07-22 21:34:12,269 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-22 21:34:12,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 302 events. 0/302 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 631 event pairs, 0 based on Foata normal form. 4/306 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-22 21:34:12,271 INFO L132 encePairwiseOnDemand]: 312/318 looper letters, 25 selfloop transitions, 21 changer transitions 0/275 dead transitions. [2022-07-22 21:34:12,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 275 transitions, 783 flow [2022-07-22 21:34:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5258 transitions. [2022-07-22 21:34:12,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.787361485474693 [2022-07-22 21:34:12,277 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5258 transitions. [2022-07-22 21:34:12,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5258 transitions. [2022-07-22 21:34:12,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:12,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5258 transitions. [2022-07-22 21:34:12,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 250.38095238095238) internal successors, (5258), 21 states have internal predecessors, (5258), 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 21:34:12,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 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 21:34:12,299 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 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 21:34:12,299 INFO L186 Difference]: Start difference. First operand has 272 places, 251 transitions, 583 flow. Second operand 21 states and 5258 transitions. [2022-07-22 21:34:12,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 275 transitions, 783 flow [2022-07-22 21:34:12,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 275 transitions, 769 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:12,305 INFO L242 Difference]: Finished difference. Result has 296 places, 264 transitions, 707 flow [2022-07-22 21:34:12,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=707, PETRI_PLACES=296, PETRI_TRANSITIONS=264} [2022-07-22 21:34:12,305 INFO L279 CegarLoopForPetriNet]: 279 programPoint places, 17 predicate places. [2022-07-22 21:34:12,306 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 264 transitions, 707 flow [2022-07-22 21:34:12,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 250.61111111111111) internal successors, (4511), 18 states have internal predecessors, (4511), 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 21:34:12,309 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:12,309 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:12,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:12,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 21:34:12,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:12,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2027817468, now seen corresponding path program 1 times [2022-07-22 21:34:12,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:12,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160177631] [2022-07-22 21:34:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:12,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:12,559 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:12,589 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:12,589 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:12,590 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:12,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:12,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 21:34:12,590 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:34:12,591 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:12,591 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-22 21:34:12,621 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-22 21:34:12,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 308 places, 352 transitions, 824 flow [2022-07-22 21:34:13,618 INFO L129 PetriNetUnfolder]: 1117/5169 cut-off events. [2022-07-22 21:34:13,618 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-22 21:34:13,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6254 conditions, 5169 events. 1117/5169 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41283 event pairs, 522 based on Foata normal form. 0/4555 useless extension candidates. Maximal degree in co-relation 3220. Up to 1024 conditions per place. [2022-07-22 21:34:13,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 352 transitions, 824 flow [2022-07-22 21:34:13,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 352 transitions, 824 flow [2022-07-22 21:34:13,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:13,773 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:13,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:13,776 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2022-07-22 21:34:13,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:13,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:13,777 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:13,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash -337205080, now seen corresponding path program 1 times [2022-07-22 21:34:13,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:13,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161304805] [2022-07-22 21:34:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:13,791 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 21:34:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:13,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161304805] [2022-07-22 21:34:13,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161304805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:13,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:13,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945822327] [2022-07-22 21:34:13,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:13,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:13,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:13,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 352 [2022-07-22 21:34:13,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 352 transitions, 824 flow. Second operand has 2 states, 2 states have (on average 282.5) internal successors, (565), 2 states have internal predecessors, (565), 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 21:34:13,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:13,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 352 [2022-07-22 21:34:13,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:15,067 INFO L129 PetriNetUnfolder]: 777/4820 cut-off events. [2022-07-22 21:34:15,067 INFO L130 PetriNetUnfolder]: For 3229/3273 co-relation queries the response was YES. [2022-07-22 21:34:15,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 4820 events. 777/4820 cut-off events. For 3229/3273 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40152 event pairs, 522 based on Foata normal form. 6564/11110 useless extension candidates. Maximal degree in co-relation 3465. Up to 1033 conditions per place. [2022-07-22 21:34:15,126 INFO L132 encePairwiseOnDemand]: 299/352 looper letters, 8 selfloop transitions, 0 changer transitions 27/298 dead transitions. [2022-07-22 21:34:15,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 298 transitions, 748 flow [2022-07-22 21:34:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 633 transitions. [2022-07-22 21:34:15,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8991477272727273 [2022-07-22 21:34:15,128 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 633 transitions. [2022-07-22 21:34:15,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 633 transitions. [2022-07-22 21:34:15,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:15,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 633 transitions. [2022-07-22 21:34:15,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 316.5) internal successors, (633), 2 states have internal predecessors, (633), 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 21:34:15,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 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 21:34:15,131 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 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 21:34:15,131 INFO L186 Difference]: Start difference. First operand has 308 places, 352 transitions, 824 flow. Second operand 2 states and 633 transitions. [2022-07-22 21:34:15,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 298 transitions, 748 flow [2022-07-22 21:34:15,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 298 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:15,137 INFO L242 Difference]: Finished difference. Result has 308 places, 271 transitions, 638 flow [2022-07-22 21:34:15,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=638, PETRI_PLACES=308, PETRI_TRANSITIONS=271} [2022-07-22 21:34:15,138 INFO L279 CegarLoopForPetriNet]: 308 programPoint places, 0 predicate places. [2022-07-22 21:34:15,138 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 271 transitions, 638 flow [2022-07-22 21:34:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 282.5) internal successors, (565), 2 states have internal predecessors, (565), 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 21:34:15,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:15,139 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 21:34:15,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash -533718585, now seen corresponding path program 1 times [2022-07-22 21:34:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:15,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425386448] [2022-07-22 21:34:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:15,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:15,157 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 21:34:15,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:15,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425386448] [2022-07-22 21:34:15,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425386448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:15,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:15,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320518854] [2022-07-22 21:34:15,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:15,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:15,160 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 352 [2022-07-22 21:34:15,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 271 transitions, 638 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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 21:34:15,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:15,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 352 [2022-07-22 21:34:15,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:15,241 INFO L129 PetriNetUnfolder]: 0/408 cut-off events. [2022-07-22 21:34:15,242 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-22 21:34:15,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 408 events. 0/408 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1157 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-22 21:34:15,243 INFO L132 encePairwiseOnDemand]: 349/352 looper letters, 17 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-07-22 21:34:15,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 275 transitions, 684 flow [2022-07-22 21:34:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2022-07-22 21:34:15,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8001893939393939 [2022-07-22 21:34:15,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2022-07-22 21:34:15,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2022-07-22 21:34:15,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:15,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2022-07-22 21:34:15,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 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 21:34:15,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 21:34:15,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 21:34:15,249 INFO L186 Difference]: Start difference. First operand has 308 places, 271 transitions, 638 flow. Second operand 3 states and 845 transitions. [2022-07-22 21:34:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 275 transitions, 684 flow [2022-07-22 21:34:15,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 275 transitions, 628 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:15,254 INFO L242 Difference]: Finished difference. Result has 292 places, 272 transitions, 594 flow [2022-07-22 21:34:15,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=594, PETRI_PLACES=292, PETRI_TRANSITIONS=272} [2022-07-22 21:34:15,255 INFO L279 CegarLoopForPetriNet]: 308 programPoint places, -16 predicate places. [2022-07-22 21:34:15,255 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 272 transitions, 594 flow [2022-07-22 21:34:15,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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 21:34:15,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:15,256 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:15,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 21:34:15,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:15,257 INFO L85 PathProgramCache]: Analyzing trace with hash 449456726, now seen corresponding path program 1 times [2022-07-22 21:34:15,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:15,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2325232] [2022-07-22 21:34:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:15,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:15,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2325232] [2022-07-22 21:34:15,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2325232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659810887] [2022-07-22 21:34:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:15,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:15,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:15,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:34:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:15,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:15,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:15,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659810887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:15,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:15,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:15,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12306438] [2022-07-22 21:34:15,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:15,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:15,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:15,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:15,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:15,600 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-07-22 21:34:15,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 272 transitions, 594 flow. Second operand has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 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 21:34:15,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:15,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-07-22 21:34:15,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:15,742 INFO L129 PetriNetUnfolder]: 0/388 cut-off events. [2022-07-22 21:34:15,742 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:34:15,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 388 events. 0/388 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1043 event pairs, 0 based on Foata normal form. 2/390 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-22 21:34:15,745 INFO L132 encePairwiseOnDemand]: 346/352 looper letters, 18 selfloop transitions, 9 changer transitions 0/282 dead transitions. [2022-07-22 21:34:15,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 282 transitions, 670 flow [2022-07-22 21:34:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2495 transitions. [2022-07-22 21:34:15,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7875631313131313 [2022-07-22 21:34:15,751 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2495 transitions. [2022-07-22 21:34:15,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2495 transitions. [2022-07-22 21:34:15,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:15,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2495 transitions. [2022-07-22 21:34:15,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 277.22222222222223) internal successors, (2495), 9 states have internal predecessors, (2495), 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 21:34:15,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 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 21:34:15,761 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 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 21:34:15,761 INFO L186 Difference]: Start difference. First operand has 292 places, 272 transitions, 594 flow. Second operand 9 states and 2495 transitions. [2022-07-22 21:34:15,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 282 transitions, 670 flow [2022-07-22 21:34:15,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 282 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:15,767 INFO L242 Difference]: Finished difference. Result has 302 places, 278 transitions, 642 flow [2022-07-22 21:34:15,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=302, PETRI_TRANSITIONS=278} [2022-07-22 21:34:15,769 INFO L279 CegarLoopForPetriNet]: 308 programPoint places, -6 predicate places. [2022-07-22 21:34:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 278 transitions, 642 flow [2022-07-22 21:34:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 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 21:34:15,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:15,770 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:15,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 21:34:15,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash 456152593, now seen corresponding path program 1 times [2022-07-22 21:34:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393424605] [2022-07-22 21:34:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:16,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393424605] [2022-07-22 21:34:16,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393424605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:16,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676342905] [2022-07-22 21:34:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:16,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:16,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:16,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:34:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676342905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:16,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:16,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699461796] [2022-07-22 21:34:16,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:16,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:16,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-07-22 21:34:16,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 278 transitions, 642 flow. Second operand has 18 states, 18 states have (on average 276.6111111111111) internal successors, (4979), 18 states have internal predecessors, (4979), 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 21:34:16,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:16,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-07-22 21:34:16,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:16,573 INFO L129 PetriNetUnfolder]: 0/348 cut-off events. [2022-07-22 21:34:16,573 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-22 21:34:16,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 791 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-22 21:34:16,574 INFO L132 encePairwiseOnDemand]: 346/352 looper letters, 26 selfloop transitions, 21 changer transitions 0/302 dead transitions. [2022-07-22 21:34:16,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 302 transitions, 844 flow [2022-07-22 21:34:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5805 transitions. [2022-07-22 21:34:16,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7853084415584416 [2022-07-22 21:34:16,580 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5805 transitions. [2022-07-22 21:34:16,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5805 transitions. [2022-07-22 21:34:16,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:16,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5805 transitions. [2022-07-22 21:34:16,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 276.42857142857144) internal successors, (5805), 21 states have internal predecessors, (5805), 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 21:34:16,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 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 21:34:16,597 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 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 21:34:16,598 INFO L186 Difference]: Start difference. First operand has 302 places, 278 transitions, 642 flow. Second operand 21 states and 5805 transitions. [2022-07-22 21:34:16,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 302 transitions, 844 flow [2022-07-22 21:34:16,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 302 transitions, 830 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:16,604 INFO L242 Difference]: Finished difference. Result has 326 places, 291 transitions, 766 flow [2022-07-22 21:34:16,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=766, PETRI_PLACES=326, PETRI_TRANSITIONS=291} [2022-07-22 21:34:16,605 INFO L279 CegarLoopForPetriNet]: 308 programPoint places, 18 predicate places. [2022-07-22 21:34:16,605 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 291 transitions, 766 flow [2022-07-22 21:34:16,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 276.6111111111111) internal successors, (4979), 18 states have internal predecessors, (4979), 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 21:34:16,606 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:16,606 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:16,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 21:34:16,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2101820155, now seen corresponding path program 1 times [2022-07-22 21:34:16,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534543373] [2022-07-22 21:34:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534543373] [2022-07-22 21:34:16,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534543373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50828739] [2022-07-22 21:34:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:16,960 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:16,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:34:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:17,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:17,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50828739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:17,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:17,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:34:17,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123480807] [2022-07-22 21:34:17,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:17,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:34:17,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:34:17,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:34:17,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-07-22 21:34:17,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 291 transitions, 766 flow. Second operand has 34 states, 34 states have (on average 276.79411764705884) internal successors, (9411), 34 states have internal predecessors, (9411), 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 21:34:17,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:17,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-07-22 21:34:17,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:17,826 INFO L129 PetriNetUnfolder]: 0/328 cut-off events. [2022-07-22 21:34:17,826 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-22 21:34:17,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 328 events. 0/328 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-22 21:34:17,827 INFO L132 encePairwiseOnDemand]: 347/352 looper letters, 27 selfloop transitions, 25 changer transitions 0/298 dead transitions. [2022-07-22 21:34:17,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 298 transitions, 916 flow [2022-07-22 21:34:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:34:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:34:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7452 transitions. [2022-07-22 21:34:17,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7840909090909091 [2022-07-22 21:34:17,835 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7452 transitions. [2022-07-22 21:34:17,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7452 transitions. [2022-07-22 21:34:17,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:17,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7452 transitions. [2022-07-22 21:34:17,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 276.0) internal successors, (7452), 27 states have internal predecessors, (7452), 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 21:34:17,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 352.0) internal successors, (9856), 28 states have internal predecessors, (9856), 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 21:34:17,861 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 352.0) internal successors, (9856), 28 states have internal predecessors, (9856), 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 21:34:17,861 INFO L186 Difference]: Start difference. First operand has 326 places, 291 transitions, 766 flow. Second operand 27 states and 7452 transitions. [2022-07-22 21:34:17,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 298 transitions, 916 flow [2022-07-22 21:34:17,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 298 transitions, 862 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-22 21:34:17,867 INFO L242 Difference]: Finished difference. Result has 329 places, 284 transitions, 755 flow [2022-07-22 21:34:17,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=755, PETRI_PLACES=329, PETRI_TRANSITIONS=284} [2022-07-22 21:34:17,868 INFO L279 CegarLoopForPetriNet]: 308 programPoint places, 21 predicate places. [2022-07-22 21:34:17,868 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 284 transitions, 755 flow [2022-07-22 21:34:17,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 276.79411764705884) internal successors, (9411), 34 states have internal predecessors, (9411), 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 21:34:17,870 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:17,870 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:17,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 21:34:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:18,077 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1697246884, now seen corresponding path program 1 times [2022-07-22 21:34:18,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:18,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875713801] [2022-07-22 21:34:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:18,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:18,115 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:18,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:18,192 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:18,192 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:18,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:18,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 21:34:18,193 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-22 21:34:18,193 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:18,193 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-22 21:34:18,219 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-22 21:34:18,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 337 places, 386 transitions, 916 flow [2022-07-22 21:34:20,205 INFO L129 PetriNetUnfolder]: 2408/10096 cut-off events. [2022-07-22 21:34:20,205 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-22 21:34:20,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12473 conditions, 10096 events. 2408/10096 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 93444 event pairs, 1291 based on Foata normal form. 0/8958 useless extension candidates. Maximal degree in co-relation 6236. Up to 2304 conditions per place. [2022-07-22 21:34:20,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 386 transitions, 916 flow [2022-07-22 21:34:20,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 386 transitions, 916 flow [2022-07-22 21:34:20,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:20,621 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:20,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:20,624 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-22 21:34:20,625 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:20,625 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:20,625 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:20,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1729227319, now seen corresponding path program 1 times [2022-07-22 21:34:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:20,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36312267] [2022-07-22 21:34:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:20,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:20,640 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 21:34:20,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:20,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36312267] [2022-07-22 21:34:20,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36312267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:20,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:20,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:20,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101605576] [2022-07-22 21:34:20,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:20,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:20,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 386 [2022-07-22 21:34:20,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 386 transitions, 916 flow. Second operand has 3 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 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 21:34:20,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:20,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 386 [2022-07-22 21:34:20,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:22,993 INFO L129 PetriNetUnfolder]: 1801/9464 cut-off events. [2022-07-22 21:34:22,993 INFO L130 PetriNetUnfolder]: For 7164/7501 co-relation queries the response was YES. [2022-07-22 21:34:23,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14204 conditions, 9464 events. 1801/9464 cut-off events. For 7164/7501 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91569 event pairs, 1291 based on Foata normal form. 15595/24529 useless extension candidates. Maximal degree in co-relation 6952. Up to 2358 conditions per place. [2022-07-22 21:34:23,089 INFO L132 encePairwiseOnDemand]: 324/386 looper letters, 18 selfloop transitions, 2 changer transitions 28/330 dead transitions. [2022-07-22 21:34:23,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 330 transitions, 862 flow [2022-07-22 21:34:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 999 transitions. [2022-07-22 21:34:23,091 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8626943005181347 [2022-07-22 21:34:23,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 999 transitions. [2022-07-22 21:34:23,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 999 transitions. [2022-07-22 21:34:23,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:23,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 999 transitions. [2022-07-22 21:34:23,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 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 21:34:23,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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 21:34:23,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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 21:34:23,095 INFO L186 Difference]: Start difference. First operand has 337 places, 386 transitions, 916 flow. Second operand 3 states and 999 transitions. [2022-07-22 21:34:23,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 330 transitions, 862 flow [2022-07-22 21:34:23,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 330 transitions, 862 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:23,104 INFO L242 Difference]: Finished difference. Result has 339 places, 299 transitions, 725 flow [2022-07-22 21:34:23,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=725, PETRI_PLACES=339, PETRI_TRANSITIONS=299} [2022-07-22 21:34:23,106 INFO L279 CegarLoopForPetriNet]: 337 programPoint places, 2 predicate places. [2022-07-22 21:34:23,106 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 299 transitions, 725 flow [2022-07-22 21:34:23,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 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 21:34:23,106 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:23,107 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:23,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 21:34:23,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash 981244152, now seen corresponding path program 1 times [2022-07-22 21:34:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173575658] [2022-07-22 21:34:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:23,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:23,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173575658] [2022-07-22 21:34:23,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173575658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:23,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872836035] [2022-07-22 21:34:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:23,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:23,140 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:23,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:34:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:23,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:23,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:23,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872836035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:23,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:23,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718808450] [2022-07-22 21:34:23,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:23,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:23,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-07-22 21:34:23,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 299 transitions, 725 flow. Second operand has 10 states, 10 states have (on average 302.3) internal successors, (3023), 10 states have internal predecessors, (3023), 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 21:34:23,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:23,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-07-22 21:34:23,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:23,462 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2022-07-22 21:34:23,462 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-22 21:34:23,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 434 events. 0/434 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1209 event pairs, 0 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-22 21:34:23,465 INFO L132 encePairwiseOnDemand]: 380/386 looper letters, 19 selfloop transitions, 9 changer transitions 0/309 dead transitions. [2022-07-22 21:34:23,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 309 transitions, 803 flow [2022-07-22 21:34:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2730 transitions. [2022-07-22 21:34:23,468 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7858376511226253 [2022-07-22 21:34:23,469 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2730 transitions. [2022-07-22 21:34:23,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2730 transitions. [2022-07-22 21:34:23,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:23,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2730 transitions. [2022-07-22 21:34:23,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 303.3333333333333) internal successors, (2730), 9 states have internal predecessors, (2730), 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 21:34:23,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 386.0) internal successors, (3860), 10 states have internal predecessors, (3860), 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 21:34:23,475 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 386.0) internal successors, (3860), 10 states have internal predecessors, (3860), 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 21:34:23,476 INFO L186 Difference]: Start difference. First operand has 339 places, 299 transitions, 725 flow. Second operand 9 states and 2730 transitions. [2022-07-22 21:34:23,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 309 transitions, 803 flow [2022-07-22 21:34:23,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 309 transitions, 729 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:23,482 INFO L242 Difference]: Finished difference. Result has 330 places, 305 transitions, 701 flow [2022-07-22 21:34:23,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=701, PETRI_PLACES=330, PETRI_TRANSITIONS=305} [2022-07-22 21:34:23,483 INFO L279 CegarLoopForPetriNet]: 337 programPoint places, -7 predicate places. [2022-07-22 21:34:23,483 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 305 transitions, 701 flow [2022-07-22 21:34:23,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 302.3) internal successors, (3023), 10 states have internal predecessors, (3023), 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 21:34:23,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:23,484 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:23,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:23,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:23,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash -918466061, now seen corresponding path program 1 times [2022-07-22 21:34:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:23,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020571774] [2022-07-22 21:34:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:23,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020571774] [2022-07-22 21:34:23,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020571774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015751951] [2022-07-22 21:34:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:23,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:23,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:23,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:34:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:24,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:24,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015751951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:24,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:24,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010704137] [2022-07-22 21:34:24,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:24,136 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-07-22 21:34:24,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 305 transitions, 701 flow. Second operand has 18 states, 18 states have (on average 302.6111111111111) internal successors, (5447), 18 states have internal predecessors, (5447), 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 21:34:24,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:24,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-07-22 21:34:24,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:24,390 INFO L129 PetriNetUnfolder]: 0/394 cut-off events. [2022-07-22 21:34:24,390 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-22 21:34:24,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 394 events. 0/394 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 952 event pairs, 0 based on Foata normal form. 4/398 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:34:24,390 INFO L132 encePairwiseOnDemand]: 380/386 looper letters, 27 selfloop transitions, 21 changer transitions 0/329 dead transitions. [2022-07-22 21:34:24,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 329 transitions, 905 flow [2022-07-22 21:34:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6352 transitions. [2022-07-22 21:34:24,395 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7836170737725142 [2022-07-22 21:34:24,395 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6352 transitions. [2022-07-22 21:34:24,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6352 transitions. [2022-07-22 21:34:24,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:24,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6352 transitions. [2022-07-22 21:34:24,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 302.4761904761905) internal successors, (6352), 21 states have internal predecessors, (6352), 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 21:34:24,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 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 21:34:24,410 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 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 21:34:24,410 INFO L186 Difference]: Start difference. First operand has 330 places, 305 transitions, 701 flow. Second operand 21 states and 6352 transitions. [2022-07-22 21:34:24,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 329 transitions, 905 flow [2022-07-22 21:34:24,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 329 transitions, 891 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:24,418 INFO L242 Difference]: Finished difference. Result has 354 places, 318 transitions, 825 flow [2022-07-22 21:34:24,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=825, PETRI_PLACES=354, PETRI_TRANSITIONS=318} [2022-07-22 21:34:24,419 INFO L279 CegarLoopForPetriNet]: 337 programPoint places, 17 predicate places. [2022-07-22 21:34:24,419 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 318 transitions, 825 flow [2022-07-22 21:34:24,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 302.6111111111111) internal successors, (5447), 18 states have internal predecessors, (5447), 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 21:34:24,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,420 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:24,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:24,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:24,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:24,637 INFO L85 PathProgramCache]: Analyzing trace with hash -62656163, now seen corresponding path program 1 times [2022-07-22 21:34:24,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:24,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155599212] [2022-07-22 21:34:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:24,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155599212] [2022-07-22 21:34:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155599212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053670563] [2022-07-22 21:34:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:24,771 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:24,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:34:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:25,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:25,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053670563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:25,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:25,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:34:25,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696345819] [2022-07-22 21:34:25,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:25,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:34:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:25,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:34:25,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:34:25,328 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-07-22 21:34:25,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 318 transitions, 825 flow. Second operand has 34 states, 34 states have (on average 302.79411764705884) internal successors, (10295), 34 states have internal predecessors, (10295), 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 21:34:25,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:25,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-07-22 21:34:25,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:25,676 INFO L129 PetriNetUnfolder]: 0/364 cut-off events. [2022-07-22 21:34:25,677 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-22 21:34:25,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 364 events. 0/364 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/367 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:34:25,678 INFO L132 encePairwiseOnDemand]: 381/386 looper letters, 30 selfloop transitions, 28 changer transitions 0/330 dead transitions. [2022-07-22 21:34:25,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 330 transitions, 1021 flow [2022-07-22 21:34:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9061 transitions. [2022-07-22 21:34:25,686 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7824697754749568 [2022-07-22 21:34:25,686 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9061 transitions. [2022-07-22 21:34:25,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9061 transitions. [2022-07-22 21:34:25,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:25,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9061 transitions. [2022-07-22 21:34:25,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 302.03333333333336) internal successors, (9061), 30 states have internal predecessors, (9061), 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 21:34:25,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 386.0) internal successors, (11966), 31 states have internal predecessors, (11966), 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 21:34:25,709 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 386.0) internal successors, (11966), 31 states have internal predecessors, (11966), 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 21:34:25,709 INFO L186 Difference]: Start difference. First operand has 354 places, 318 transitions, 825 flow. Second operand 30 states and 9061 transitions. [2022-07-22 21:34:25,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 330 transitions, 1021 flow [2022-07-22 21:34:25,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 330 transitions, 961 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-22 21:34:25,717 INFO L242 Difference]: Finished difference. Result has 360 places, 314 transitions, 838 flow [2022-07-22 21:34:25,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=838, PETRI_PLACES=360, PETRI_TRANSITIONS=314} [2022-07-22 21:34:25,718 INFO L279 CegarLoopForPetriNet]: 337 programPoint places, 23 predicate places. [2022-07-22 21:34:25,718 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 314 transitions, 838 flow [2022-07-22 21:34:25,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 302.79411764705884) internal successors, (10295), 34 states have internal predecessors, (10295), 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 21:34:25,719 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:25,719 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:25,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:25,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-22 21:34:25,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash -235375115, now seen corresponding path program 1 times [2022-07-22 21:34:25,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:25,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873673828] [2022-07-22 21:34:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:25,973 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:26,006 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:26,006 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:26,006 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:26,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:26,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-22 21:34:26,007 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:34:26,007 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:26,007 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-22 21:34:26,040 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-22 21:34:26,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 366 places, 420 transitions, 1010 flow [2022-07-22 21:34:30,728 INFO L129 PetriNetUnfolder]: 5235/20143 cut-off events. [2022-07-22 21:34:30,729 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-22 21:34:31,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25349 conditions, 20143 events. 5235/20143 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 211743 event pairs, 3084 based on Foata normal form. 0/17969 useless extension candidates. Maximal degree in co-relation 12453. Up to 5120 conditions per place. [2022-07-22 21:34:31,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 420 transitions, 1010 flow [2022-07-22 21:34:31,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 366 places, 420 transitions, 1010 flow [2022-07-22 21:34:31,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:31,608 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:31,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:31,611 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-22 21:34:31,611 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:31,611 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:31,611 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:31,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -919706802, now seen corresponding path program 1 times [2022-07-22 21:34:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:31,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665052474] [2022-07-22 21:34:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:31,622 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 21:34:31,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:31,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665052474] [2022-07-22 21:34:31,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665052474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:31,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:31,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:31,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19699937] [2022-07-22 21:34:31,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:31,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:31,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:31,625 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 420 [2022-07-22 21:34:31,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 420 transitions, 1010 flow. Second operand has 2 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 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 21:34:31,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:31,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 420 [2022-07-22 21:34:31,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:36,580 INFO L129 PetriNetUnfolder]: 4107/19004 cut-off events. [2022-07-22 21:34:36,580 INFO L130 PetriNetUnfolder]: For 15645/15715 co-relation queries the response was YES. [2022-07-22 21:34:36,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 19004 events. 4107/19004 cut-off events. For 15645/15715 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 205960 event pairs, 3084 based on Foata normal form. 32006/49964 useless extension candidates. Maximal degree in co-relation 14150. Up to 5131 conditions per place. [2022-07-22 21:34:36,805 INFO L132 encePairwiseOnDemand]: 355/420 looper letters, 10 selfloop transitions, 0 changer transitions 29/354 dead transitions. [2022-07-22 21:34:36,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 354 transitions, 918 flow [2022-07-22 21:34:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 753 transitions. [2022-07-22 21:34:36,807 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8964285714285715 [2022-07-22 21:34:36,807 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 753 transitions. [2022-07-22 21:34:36,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 753 transitions. [2022-07-22 21:34:36,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:36,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 753 transitions. [2022-07-22 21:34:36,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 376.5) internal successors, (753), 2 states have internal predecessors, (753), 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 21:34:36,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 420.0) internal successors, (1260), 3 states have internal predecessors, (1260), 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 21:34:36,809 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 420.0) internal successors, (1260), 3 states have internal predecessors, (1260), 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 21:34:36,809 INFO L186 Difference]: Start difference. First operand has 366 places, 420 transitions, 1010 flow. Second operand 2 states and 753 transitions. [2022-07-22 21:34:36,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 354 transitions, 918 flow [2022-07-22 21:34:36,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 354 transitions, 918 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:36,820 INFO L242 Difference]: Finished difference. Result has 366 places, 325 transitions, 790 flow [2022-07-22 21:34:36,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=790, PETRI_PLACES=366, PETRI_TRANSITIONS=325} [2022-07-22 21:34:36,821 INFO L279 CegarLoopForPetriNet]: 366 programPoint places, 0 predicate places. [2022-07-22 21:34:36,821 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 325 transitions, 790 flow [2022-07-22 21:34:36,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 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 21:34:36,822 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:36,822 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:36,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-22 21:34:36,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1116220307, now seen corresponding path program 1 times [2022-07-22 21:34:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:36,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387098515] [2022-07-22 21:34:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:36,843 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 21:34:36,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:36,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387098515] [2022-07-22 21:34:36,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387098515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:36,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:36,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:36,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644007712] [2022-07-22 21:34:36,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:36,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:36,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:36,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:36,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:36,847 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 420 [2022-07-22 21:34:36,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 325 transitions, 790 flow. Second operand has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 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 21:34:36,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:36,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 420 [2022-07-22 21:34:36,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:36,971 INFO L129 PetriNetUnfolder]: 0/500 cut-off events. [2022-07-22 21:34:36,971 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-22 21:34:36,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 500 events. 0/500 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1488 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-22 21:34:36,973 INFO L132 encePairwiseOnDemand]: 417/420 looper letters, 19 selfloop transitions, 2 changer transitions 0/329 dead transitions. [2022-07-22 21:34:36,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 329 transitions, 840 flow [2022-07-22 21:34:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1003 transitions. [2022-07-22 21:34:36,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.796031746031746 [2022-07-22 21:34:36,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1003 transitions. [2022-07-22 21:34:36,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1003 transitions. [2022-07-22 21:34:36,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:36,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1003 transitions. [2022-07-22 21:34:36,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.3333333333333) internal successors, (1003), 3 states have internal predecessors, (1003), 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 21:34:36,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 21:34:36,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 21:34:36,978 INFO L186 Difference]: Start difference. First operand has 366 places, 325 transitions, 790 flow. Second operand 3 states and 1003 transitions. [2022-07-22 21:34:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 329 transitions, 840 flow [2022-07-22 21:34:36,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 329 transitions, 750 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:36,984 INFO L242 Difference]: Finished difference. Result has 350 places, 326 transitions, 712 flow [2022-07-22 21:34:36,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=712, PETRI_PLACES=350, PETRI_TRANSITIONS=326} [2022-07-22 21:34:36,986 INFO L279 CegarLoopForPetriNet]: 366 programPoint places, -16 predicate places. [2022-07-22 21:34:36,986 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 326 transitions, 712 flow [2022-07-22 21:34:36,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 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 21:34:36,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:36,986 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-22 21:34:36,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2108742908, now seen corresponding path program 1 times [2022-07-22 21:34:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:36,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166103639] [2022-07-22 21:34:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:37,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166103639] [2022-07-22 21:34:37,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166103639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:37,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044114468] [2022-07-22 21:34:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:37,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:37,016 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:37,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:34:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:37,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044114468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:37,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:37,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:37,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771974789] [2022-07-22 21:34:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:37,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:37,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-07-22 21:34:37,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 326 transitions, 712 flow. Second operand has 10 states, 10 states have (on average 328.3) internal successors, (3283), 10 states have internal predecessors, (3283), 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 21:34:37,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:37,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-07-22 21:34:37,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:37,349 INFO L129 PetriNetUnfolder]: 0/480 cut-off events. [2022-07-22 21:34:37,349 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-22 21:34:37,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 480 events. 0/480 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1372 event pairs, 0 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-22 21:34:37,350 INFO L132 encePairwiseOnDemand]: 414/420 looper letters, 20 selfloop transitions, 9 changer transitions 0/336 dead transitions. [2022-07-22 21:34:37,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 336 transitions, 792 flow [2022-07-22 21:34:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2965 transitions. [2022-07-22 21:34:37,352 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7843915343915344 [2022-07-22 21:34:37,352 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2965 transitions. [2022-07-22 21:34:37,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2965 transitions. [2022-07-22 21:34:37,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:37,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2965 transitions. [2022-07-22 21:34:37,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 329.44444444444446) internal successors, (2965), 9 states have internal predecessors, (2965), 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 21:34:37,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 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 21:34:37,357 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 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 21:34:37,357 INFO L186 Difference]: Start difference. First operand has 350 places, 326 transitions, 712 flow. Second operand 9 states and 2965 transitions. [2022-07-22 21:34:37,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 336 transitions, 792 flow [2022-07-22 21:34:37,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 336 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:37,362 INFO L242 Difference]: Finished difference. Result has 360 places, 332 transitions, 760 flow [2022-07-22 21:34:37,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=760, PETRI_PLACES=360, PETRI_TRANSITIONS=332} [2022-07-22 21:34:37,363 INFO L279 CegarLoopForPetriNet]: 366 programPoint places, -6 predicate places. [2022-07-22 21:34:37,363 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 332 transitions, 760 flow [2022-07-22 21:34:37,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 328.3) internal successors, (3283), 10 states have internal predecessors, (3283), 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 21:34:37,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:37,364 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:37,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 21:34:37,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-22 21:34:37,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:37,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1540552887, now seen corresponding path program 1 times [2022-07-22 21:34:37,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:37,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66319835] [2022-07-22 21:34:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:37,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66319835] [2022-07-22 21:34:37,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66319835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:37,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528549311] [2022-07-22 21:34:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:37,639 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:37,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 21:34:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:37,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528549311] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:37,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:37,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:37,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008698794] [2022-07-22 21:34:37,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:37,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:37,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-07-22 21:34:37,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 332 transitions, 760 flow. Second operand has 18 states, 18 states have (on average 328.6111111111111) internal successors, (5915), 18 states have internal predecessors, (5915), 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 21:34:37,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:37,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-07-22 21:34:37,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:38,152 INFO L129 PetriNetUnfolder]: 0/440 cut-off events. [2022-07-22 21:34:38,152 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-22 21:34:38,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 440 events. 0/440 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1116 event pairs, 0 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-22 21:34:38,153 INFO L132 encePairwiseOnDemand]: 414/420 looper letters, 28 selfloop transitions, 21 changer transitions 0/356 dead transitions. [2022-07-22 21:34:38,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 356 transitions, 966 flow [2022-07-22 21:34:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6899 transitions. [2022-07-22 21:34:38,159 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7821995464852608 [2022-07-22 21:34:38,159 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6899 transitions. [2022-07-22 21:34:38,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6899 transitions. [2022-07-22 21:34:38,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:38,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6899 transitions. [2022-07-22 21:34:38,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 328.5238095238095) internal successors, (6899), 21 states have internal predecessors, (6899), 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 21:34:38,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 420.0) internal successors, (9240), 22 states have internal predecessors, (9240), 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 21:34:38,173 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 420.0) internal successors, (9240), 22 states have internal predecessors, (9240), 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 21:34:38,173 INFO L186 Difference]: Start difference. First operand has 360 places, 332 transitions, 760 flow. Second operand 21 states and 6899 transitions. [2022-07-22 21:34:38,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 356 transitions, 966 flow [2022-07-22 21:34:38,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 356 transitions, 952 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:38,181 INFO L242 Difference]: Finished difference. Result has 384 places, 345 transitions, 884 flow [2022-07-22 21:34:38,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=884, PETRI_PLACES=384, PETRI_TRANSITIONS=345} [2022-07-22 21:34:38,181 INFO L279 CegarLoopForPetriNet]: 366 programPoint places, 18 predicate places. [2022-07-22 21:34:38,181 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 345 transitions, 884 flow [2022-07-22 21:34:38,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 328.6111111111111) internal successors, (5915), 18 states have internal predecessors, (5915), 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 21:34:38,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:38,182 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:38,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:38,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-22 21:34:38,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1163509153, now seen corresponding path program 1 times [2022-07-22 21:34:38,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618074795] [2022-07-22 21:34:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618074795] [2022-07-22 21:34:38,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618074795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32058035] [2022-07-22 21:34:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:38,648 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:38,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 21:34:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:38,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:39,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32058035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:39,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:39,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:34:39,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672008648] [2022-07-22 21:34:39,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:34:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:34:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:34:39,199 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-07-22 21:34:39,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 345 transitions, 884 flow. Second operand has 34 states, 34 states have (on average 328.79411764705884) internal successors, (11179), 34 states have internal predecessors, (11179), 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 21:34:39,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:39,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-07-22 21:34:39,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:39,579 INFO L129 PetriNetUnfolder]: 0/400 cut-off events. [2022-07-22 21:34:39,580 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-22 21:34:39,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 400 events. 0/400 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-22 21:34:39,581 INFO L132 encePairwiseOnDemand]: 415/420 looper letters, 33 selfloop transitions, 31 changer transitions 0/362 dead transitions. [2022-07-22 21:34:39,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 362 transitions, 1126 flow [2022-07-22 21:34:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 21:34:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-22 21:34:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10826 transitions. [2022-07-22 21:34:39,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7810966810966811 [2022-07-22 21:34:39,589 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10826 transitions. [2022-07-22 21:34:39,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10826 transitions. [2022-07-22 21:34:39,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:39,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10826 transitions. [2022-07-22 21:34:39,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 328.06060606060606) internal successors, (10826), 33 states have internal predecessors, (10826), 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 21:34:39,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 420.0) internal successors, (14280), 34 states have internal predecessors, (14280), 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 21:34:39,612 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 420.0) internal successors, (14280), 34 states have internal predecessors, (14280), 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 21:34:39,612 INFO L186 Difference]: Start difference. First operand has 384 places, 345 transitions, 884 flow. Second operand 33 states and 10826 transitions. [2022-07-22 21:34:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 362 transitions, 1126 flow [2022-07-22 21:34:39,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 362 transitions, 1060 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-22 21:34:39,620 INFO L242 Difference]: Finished difference. Result has 393 places, 344 transitions, 921 flow [2022-07-22 21:34:39,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=921, PETRI_PLACES=393, PETRI_TRANSITIONS=344} [2022-07-22 21:34:39,621 INFO L279 CegarLoopForPetriNet]: 366 programPoint places, 27 predicate places. [2022-07-22 21:34:39,621 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 344 transitions, 921 flow [2022-07-22 21:34:39,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 328.79411764705884) internal successors, (11179), 34 states have internal predecessors, (11179), 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 21:34:39,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:39,623 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:39,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:39,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:39,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash 954621519, now seen corresponding path program 1 times [2022-07-22 21:34:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:39,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242594413] [2022-07-22 21:34:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:39,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:39,887 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:39,926 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:39,926 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:39,927 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:39,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:39,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-22 21:34:39,927 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-22 21:34:39,928 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:39,928 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-22 21:34:39,957 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-22 21:34:39,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 395 places, 454 transitions, 1106 flow [2022-07-22 21:34:49,996 INFO L129 PetriNetUnfolder]: 11390/40686 cut-off events. [2022-07-22 21:34:49,997 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-22 21:34:51,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52050 conditions, 40686 events. 11390/40686 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 477093 event pairs, 7181 based on Foata normal form. 0/36452 useless extension candidates. Maximal degree in co-relation 25327. Up to 11264 conditions per place. [2022-07-22 21:34:51,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 395 places, 454 transitions, 1106 flow [2022-07-22 21:34:52,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 454 transitions, 1106 flow [2022-07-22 21:34:52,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:52,436 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@1190c0b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f8e6f47 [2022-07-22 21:34:52,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:52,439 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2022-07-22 21:34:52,439 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:52,439 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:52,439 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:52,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1501815956, now seen corresponding path program 1 times [2022-07-22 21:34:52,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:52,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254602415] [2022-07-22 21:34:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:52,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:52,451 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 21:34:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254602415] [2022-07-22 21:34:52,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254602415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:52,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427160816] [2022-07-22 21:34:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:52,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:52,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 454 [2022-07-22 21:34:52,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 454 transitions, 1106 flow. Second operand has 2 states, 2 states have (on average 360.5) internal successors, (721), 2 states have internal predecessors, (721), 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 21:34:52,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:52,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 454 [2022-07-22 21:34:52,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand