./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:04:51,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:04:51,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:04:51,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:04:51,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:04:51,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:04:51,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:04:51,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:04:51,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:04:51,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:04:51,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:04:51,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:04:51,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:04:51,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:04:51,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:04:51,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:04:51,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:04:51,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:04:51,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:04:51,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:04:51,189 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:04:51,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:04:51,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:04:51,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:04:51,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:04:51,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:04:51,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:04:51,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:04:51,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:04:51,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:04:51,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:04:51,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:04:51,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:04:51,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:04:51,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:04:51,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:04:51,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:04:51,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:04:51,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:04:51,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:04:51,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:04:51,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:04:51,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:04:51,237 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:04:51,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:04:51,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:04:51,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:04:51,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:04:51,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:04:51,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:04:51,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:04:51,240 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:04:51,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:04:51,241 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:04:51,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:04:51,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:04:51,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:04:51,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:04:51,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:04:51,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:04:51,242 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:04:51,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:04:51,242 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:04:51,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:04:51,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:04:51,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:04:51,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:04:51,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:51,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:04:51,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:04:51,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:04:51,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:04:51,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:04:51,244 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:04:51,244 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:04:51,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:04:51,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-07-21 09:04:51,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:04:51,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:04:51,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:04:51,550 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:04:51,550 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:04:51,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-21 09:04:51,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da7a031d7/3703295f2ac042a5a7f887dbfeea3c8a/FLAGf08f3b8b5 [2022-07-21 09:04:52,007 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:04:52,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-21 09:04:52,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da7a031d7/3703295f2ac042a5a7f887dbfeea3c8a/FLAGf08f3b8b5 [2022-07-21 09:04:52,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da7a031d7/3703295f2ac042a5a7f887dbfeea3c8a [2022-07-21 09:04:52,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:04:52,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:04:52,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:52,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:04:52,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:04:52,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f2c951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52, skipping insertion in model container [2022-07-21 09:04:52,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:04:52,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:04:52,264 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/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-07-21 09:04:52,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:52,280 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:04:52,314 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/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-07-21 09:04:52,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:52,334 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:04:52,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52 WrapperNode [2022-07-21 09:04:52,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:52,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:52,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:04:52,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:04:52,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,391 INFO L137 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 333 [2022-07-21 09:04:52,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:52,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:04:52,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:04:52,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:04:52,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:04:52,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:04:52,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:04:52,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:04:52,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (1/1) ... [2022-07-21 09:04:52,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:52,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:52,481 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) [2022-07-21 09:04:52,484 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 [2022-07-21 09:04:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:04:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:04:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:04:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:04:52,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:04:52,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:04:52,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:04:52,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:04:52,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:04:52,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:04:52,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:04:52,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:04:52,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:04:52,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:04:52,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:04:52,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:04:52,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:04:52,521 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:04:52,587 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:04:52,588 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:04:52,983 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:04:53,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:04:53,142 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 09:04:53,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:53 BoogieIcfgContainer [2022-07-21 09:04:53,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:04:53,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:04:53,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:04:53,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:04:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:04:52" (1/3) ... [2022-07-21 09:04:53,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d0182a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:53, skipping insertion in model container [2022-07-21 09:04:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:52" (2/3) ... [2022-07-21 09:04:53,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d0182a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:53, skipping insertion in model container [2022-07-21 09:04:53,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:53" (3/3) ... [2022-07-21 09:04:53,154 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2022-07-21 09:04:53,157 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:04:53,166 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:04:53,167 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:04:53,167 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:04:53,227 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:04:53,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 254 transitions, 532 flow [2022-07-21 09:04:53,336 INFO L129 PetriNetUnfolder]: 19/251 cut-off events. [2022-07-21 09:04:53,340 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:04:53,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 251 events. 19/251 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2022-07-21 09:04:53,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 254 transitions, 532 flow [2022-07-21 09:04:53,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 240 transitions, 498 flow [2022-07-21 09:04:53,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:04:53,361 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@56a6af0c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6db4c84e [2022-07-21 09:04:53,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:04:53,388 INFO L129 PetriNetUnfolder]: 19/239 cut-off events. [2022-07-21 09:04:53,388 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:04:53,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:53,389 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:53,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1728033997, now seen corresponding path program 1 times [2022-07-21 09:04:53,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:53,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448413087] [2022-07-21 09:04:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:53,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:53,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:53,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448413087] [2022-07-21 09:04:53,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448413087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:53,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:53,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:04:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574542624] [2022-07-21 09:04:53,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:53,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:04:53,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:04:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:04:53,583 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 254 [2022-07-21 09:04:53,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 240 transitions, 498 flow. Second operand has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:53,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 254 [2022-07-21 09:04:53,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:53,685 INFO L129 PetriNetUnfolder]: 66/311 cut-off events. [2022-07-21 09:04:53,685 INFO L130 PetriNetUnfolder]: For 34/35 co-relation queries the response was YES. [2022-07-21 09:04:53,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 311 events. 66/311 cut-off events. For 34/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 446 event pairs, 31 based on Foata normal form. 42/332 useless extension candidates. Maximal degree in co-relation 251. Up to 99 conditions per place. [2022-07-21 09:04:53,690 INFO L132 encePairwiseOnDemand]: 241/254 looper letters, 14 selfloop transitions, 0 changer transitions 7/227 dead transitions. [2022-07-21 09:04:53,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 227 transitions, 500 flow [2022-07-21 09:04:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:04:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:04:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-07-21 09:04:53,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9429133858267716 [2022-07-21 09:04:53,705 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-07-21 09:04:53,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-07-21 09:04:53,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:53,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-07-21 09:04:53,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,718 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,720 INFO L186 Difference]: Start difference. First operand has 231 places, 240 transitions, 498 flow. Second operand 2 states and 479 transitions. [2022-07-21 09:04:53,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 227 transitions, 500 flow [2022-07-21 09:04:53,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 227 transitions, 488 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:04:53,730 INFO L242 Difference]: Finished difference. Result has 226 places, 220 transitions, 446 flow [2022-07-21 09:04:53,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=446, PETRI_PLACES=226, PETRI_TRANSITIONS=220} [2022-07-21 09:04:53,734 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-21 09:04:53,735 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 220 transitions, 446 flow [2022-07-21 09:04:53,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,735 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:53,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:53,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:04:53,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1182409905, now seen corresponding path program 1 times [2022-07-21 09:04:53,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:53,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464508374] [2022-07-21 09:04:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:53,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:53,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464508374] [2022-07-21 09:04:54,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464508374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:54,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:54,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:04:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057347082] [2022-07-21 09:04:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:04:54,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:04:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:04:54,005 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 254 [2022-07-21 09:04:54,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 220 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:54,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 254 [2022-07-21 09:04:54,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:54,149 INFO L129 PetriNetUnfolder]: 79/371 cut-off events. [2022-07-21 09:04:54,150 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-21 09:04:54,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 371 events. 79/371 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 754 event pairs, 8 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 539. Up to 115 conditions per place. [2022-07-21 09:04:54,153 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 48 selfloop transitions, 4 changer transitions 4/232 dead transitions. [2022-07-21 09:04:54,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 232 transitions, 587 flow [2022-07-21 09:04:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:04:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:04:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2022-07-21 09:04:54,156 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7889763779527559 [2022-07-21 09:04:54,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2022-07-21 09:04:54,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2022-07-21 09:04:54,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:54,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2022-07-21 09:04:54,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,163 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,163 INFO L186 Difference]: Start difference. First operand has 226 places, 220 transitions, 446 flow. Second operand 5 states and 1002 transitions. [2022-07-21 09:04:54,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 232 transitions, 587 flow [2022-07-21 09:04:54,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 232 transitions, 587 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:04:54,171 INFO L242 Difference]: Finished difference. Result has 226 places, 223 transitions, 476 flow [2022-07-21 09:04:54,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=226, PETRI_TRANSITIONS=223} [2022-07-21 09:04:54,172 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-21 09:04:54,172 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 223 transitions, 476 flow [2022-07-21 09:04:54,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:54,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:54,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:04:54,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash 811659123, now seen corresponding path program 1 times [2022-07-21 09:04:54,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:54,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413319448] [2022-07-21 09:04:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:54,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413319448] [2022-07-21 09:04:54,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413319448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:54,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:54,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:04:54,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123237635] [2022-07-21 09:04:54,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:54,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:04:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:04:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:04:54,287 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-21 09:04:54,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 223 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:54,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-21 09:04:54,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:54,443 INFO L129 PetriNetUnfolder]: 83/511 cut-off events. [2022-07-21 09:04:54,443 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-21 09:04:54,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 511 events. 83/511 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1273 event pairs, 36 based on Foata normal form. 13/495 useless extension candidates. Maximal degree in co-relation 794. Up to 145 conditions per place. [2022-07-21 09:04:54,445 INFO L132 encePairwiseOnDemand]: 242/254 looper letters, 51 selfloop transitions, 8 changer transitions 32/259 dead transitions. [2022-07-21 09:04:54,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 259 transitions, 739 flow [2022-07-21 09:04:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:04:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:04:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1783 transitions. [2022-07-21 09:04:54,449 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7799650043744532 [2022-07-21 09:04:54,449 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1783 transitions. [2022-07-21 09:04:54,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1783 transitions. [2022-07-21 09:04:54,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:54,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1783 transitions. [2022-07-21 09:04:54,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.11111111111111) internal successors, (1783), 9 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,457 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,457 INFO L186 Difference]: Start difference. First operand has 226 places, 223 transitions, 476 flow. Second operand 9 states and 1783 transitions. [2022-07-21 09:04:54,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 259 transitions, 739 flow [2022-07-21 09:04:54,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 259 transitions, 730 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 09:04:54,462 INFO L242 Difference]: Finished difference. Result has 231 places, 224 transitions, 502 flow [2022-07-21 09:04:54,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=502, PETRI_PLACES=231, PETRI_TRANSITIONS=224} [2022-07-21 09:04:54,463 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 0 predicate places. [2022-07-21 09:04:54,463 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 224 transitions, 502 flow [2022-07-21 09:04:54,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,464 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:54,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:04:54,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1273864345, now seen corresponding path program 1 times [2022-07-21 09:04:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:54,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007152289] [2022-07-21 09:04:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:04:54,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007152289] [2022-07-21 09:04:54,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007152289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:54,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:54,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:04:54,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780994402] [2022-07-21 09:04:54,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:54,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:04:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:04:54,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:04:54,595 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-21 09:04:54,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 224 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:54,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-21 09:04:54,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:54,665 INFO L129 PetriNetUnfolder]: 84/434 cut-off events. [2022-07-21 09:04:54,666 INFO L130 PetriNetUnfolder]: For 88/89 co-relation queries the response was YES. [2022-07-21 09:04:54,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 434 events. 84/434 cut-off events. For 88/89 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1118 event pairs, 40 based on Foata normal form. 12/416 useless extension candidates. Maximal degree in co-relation 699. Up to 104 conditions per place. [2022-07-21 09:04:54,668 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 26 selfloop transitions, 6 changer transitions 0/232 dead transitions. [2022-07-21 09:04:54,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 232 transitions, 593 flow [2022-07-21 09:04:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:04:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:04:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-07-21 09:04:54,670 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8927165354330708 [2022-07-21 09:04:54,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-07-21 09:04:54,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-07-21 09:04:54,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:54,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-07-21 09:04:54,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,675 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,675 INFO L186 Difference]: Start difference. First operand has 231 places, 224 transitions, 502 flow. Second operand 4 states and 907 transitions. [2022-07-21 09:04:54,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 232 transitions, 593 flow [2022-07-21 09:04:54,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 232 transitions, 579 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:04:54,679 INFO L242 Difference]: Finished difference. Result has 228 places, 224 transitions, 504 flow [2022-07-21 09:04:54,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=504, PETRI_PLACES=228, PETRI_TRANSITIONS=224} [2022-07-21 09:04:54,680 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -3 predicate places. [2022-07-21 09:04:54,680 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 224 transitions, 504 flow [2022-07-21 09:04:54,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:54,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:54,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:04:54,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash 642704095, now seen corresponding path program 1 times [2022-07-21 09:04:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:54,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682972449] [2022-07-21 09:04:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:54,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:04:54,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682972449] [2022-07-21 09:04:54,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682972449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:54,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:54,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:04:54,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410986967] [2022-07-21 09:04:54,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:54,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:04:54,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:54,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:04:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:04:54,867 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-21 09:04:54,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 224 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:54,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-21 09:04:54,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:54,939 INFO L129 PetriNetUnfolder]: 96/423 cut-off events. [2022-07-21 09:04:54,940 INFO L130 PetriNetUnfolder]: For 124/125 co-relation queries the response was YES. [2022-07-21 09:04:54,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 423 events. 96/423 cut-off events. For 124/125 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1109 event pairs, 18 based on Foata normal form. 8/413 useless extension candidates. Maximal degree in co-relation 747. Up to 107 conditions per place. [2022-07-21 09:04:54,942 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 24 selfloop transitions, 6 changer transitions 3/233 dead transitions. [2022-07-21 09:04:54,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 599 flow [2022-07-21 09:04:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:04:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:04:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2022-07-21 09:04:54,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8956692913385826 [2022-07-21 09:04:54,945 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2022-07-21 09:04:54,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2022-07-21 09:04:54,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:54,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2022-07-21 09:04:54,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,948 INFO L186 Difference]: Start difference. First operand has 228 places, 224 transitions, 504 flow. Second operand 4 states and 910 transitions. [2022-07-21 09:04:54,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 599 flow [2022-07-21 09:04:54,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 233 transitions, 589 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:04:54,952 INFO L242 Difference]: Finished difference. Result has 230 places, 224 transitions, 510 flow [2022-07-21 09:04:54,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=510, PETRI_PLACES=230, PETRI_TRANSITIONS=224} [2022-07-21 09:04:54,953 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -1 predicate places. [2022-07-21 09:04:54,954 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 224 transitions, 510 flow [2022-07-21 09:04:54,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,954 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:54,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:54,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:04:54,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1052780232, now seen corresponding path program 1 times [2022-07-21 09:04:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:54,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818853011] [2022-07-21 09:04:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:04:55,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818853011] [2022-07-21 09:04:55,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818853011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:55,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:55,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:04:55,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644106981] [2022-07-21 09:04:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:04:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:55,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:04:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:04:55,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-21 09:04:55,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 224 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:55,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-21 09:04:55,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:55,181 INFO L129 PetriNetUnfolder]: 121/551 cut-off events. [2022-07-21 09:04:55,181 INFO L130 PetriNetUnfolder]: For 162/164 co-relation queries the response was YES. [2022-07-21 09:04:55,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 551 events. 121/551 cut-off events. For 162/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1666 event pairs, 73 based on Foata normal form. 7/530 useless extension candidates. Maximal degree in co-relation 1057. Up to 168 conditions per place. [2022-07-21 09:04:55,184 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 52 selfloop transitions, 8 changer transitions 25/253 dead transitions. [2022-07-21 09:04:55,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 253 transitions, 758 flow [2022-07-21 09:04:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:04:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:04:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1774 transitions. [2022-07-21 09:04:55,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7760279965004374 [2022-07-21 09:04:55,187 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1774 transitions. [2022-07-21 09:04:55,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1774 transitions. [2022-07-21 09:04:55,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:55,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1774 transitions. [2022-07-21 09:04:55,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.11111111111111) internal successors, (1774), 9 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,194 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,194 INFO L186 Difference]: Start difference. First operand has 230 places, 224 transitions, 510 flow. Second operand 9 states and 1774 transitions. [2022-07-21 09:04:55,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 253 transitions, 758 flow [2022-07-21 09:04:55,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 253 transitions, 748 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:04:55,198 INFO L242 Difference]: Finished difference. Result has 238 places, 225 transitions, 528 flow [2022-07-21 09:04:55,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=238, PETRI_TRANSITIONS=225} [2022-07-21 09:04:55,199 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-21 09:04:55,200 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 225 transitions, 528 flow [2022-07-21 09:04:55,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:55,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:55,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:04:55,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1352398940, now seen corresponding path program 1 times [2022-07-21 09:04:55,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:55,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078658857] [2022-07-21 09:04:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:55,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:55,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078658857] [2022-07-21 09:04:55,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078658857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:55,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:55,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:04:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615613567] [2022-07-21 09:04:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:04:55,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:04:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:04:55,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-21 09:04:55,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 225 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:55,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-21 09:04:55,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:55,407 INFO L129 PetriNetUnfolder]: 101/483 cut-off events. [2022-07-21 09:04:55,407 INFO L130 PetriNetUnfolder]: For 159/161 co-relation queries the response was YES. [2022-07-21 09:04:55,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 483 events. 101/483 cut-off events. For 159/161 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1332 event pairs, 60 based on Foata normal form. 4/465 useless extension candidates. Maximal degree in co-relation 923. Up to 165 conditions per place. [2022-07-21 09:04:55,410 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 55 selfloop transitions, 6 changer transitions 9/238 dead transitions. [2022-07-21 09:04:55,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 238 transitions, 706 flow [2022-07-21 09:04:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:04:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:04:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1382 transitions. [2022-07-21 09:04:55,413 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772778402699663 [2022-07-21 09:04:55,413 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1382 transitions. [2022-07-21 09:04:55,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1382 transitions. [2022-07-21 09:04:55,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:55,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1382 transitions. [2022-07-21 09:04:55,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.42857142857142) internal successors, (1382), 7 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,418 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,418 INFO L186 Difference]: Start difference. First operand has 238 places, 225 transitions, 528 flow. Second operand 7 states and 1382 transitions. [2022-07-21 09:04:55,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 238 transitions, 706 flow [2022-07-21 09:04:55,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 238 transitions, 688 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-21 09:04:55,423 INFO L242 Difference]: Finished difference. Result has 238 places, 226 transitions, 532 flow [2022-07-21 09:04:55,423 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=532, PETRI_PLACES=238, PETRI_TRANSITIONS=226} [2022-07-21 09:04:55,424 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-21 09:04:55,424 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 226 transitions, 532 flow [2022-07-21 09:04:55,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:55,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:55,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:04:55,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash -879290637, now seen corresponding path program 1 times [2022-07-21 09:04:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:55,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543252100] [2022-07-21 09:04:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:55,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:55,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543252100] [2022-07-21 09:04:55,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543252100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:55,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:55,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:04:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209707144] [2022-07-21 09:04:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:55,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:04:55,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:04:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:04:55,541 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-21 09:04:55,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 226 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:55,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-21 09:04:55,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:55,596 INFO L129 PetriNetUnfolder]: 52/372 cut-off events. [2022-07-21 09:04:55,596 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2022-07-21 09:04:55,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 372 events. 52/372 cut-off events. For 110/114 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 690 event pairs, 20 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 584. Up to 84 conditions per place. [2022-07-21 09:04:55,598 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 19 selfloop transitions, 6 changer transitions 3/230 dead transitions. [2022-07-21 09:04:55,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 230 transitions, 601 flow [2022-07-21 09:04:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:04:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:04:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2022-07-21 09:04:55,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8963254593175853 [2022-07-21 09:04:55,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2022-07-21 09:04:55,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2022-07-21 09:04:55,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:55,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2022-07-21 09:04:55,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,603 INFO L186 Difference]: Start difference. First operand has 238 places, 226 transitions, 532 flow. Second operand 3 states and 683 transitions. [2022-07-21 09:04:55,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 230 transitions, 601 flow [2022-07-21 09:04:55,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 230 transitions, 589 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-21 09:04:55,607 INFO L242 Difference]: Finished difference. Result has 235 places, 227 transitions, 546 flow [2022-07-21 09:04:55,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=235, PETRI_TRANSITIONS=227} [2022-07-21 09:04:55,608 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 4 predicate places. [2022-07-21 09:04:55,608 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 227 transitions, 546 flow [2022-07-21 09:04:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:55,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:55,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:04:55,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1058869021, now seen corresponding path program 1 times [2022-07-21 09:04:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:55,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947142893] [2022-07-21 09:04:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:55,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:55,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:55,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947142893] [2022-07-21 09:04:55,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947142893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:55,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:55,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:04:55,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930649194] [2022-07-21 09:04:55,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:55,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:04:55,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:55,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:04:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:04:55,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-21 09:04:55,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 227 transitions, 546 flow. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:55,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-21 09:04:55,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:55,808 INFO L129 PetriNetUnfolder]: 134/666 cut-off events. [2022-07-21 09:04:55,808 INFO L130 PetriNetUnfolder]: For 352/371 co-relation queries the response was YES. [2022-07-21 09:04:55,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 666 events. 134/666 cut-off events. For 352/371 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2551 event pairs, 35 based on Foata normal form. 8/626 useless extension candidates. Maximal degree in co-relation 1220. Up to 100 conditions per place. [2022-07-21 09:04:55,812 INFO L132 encePairwiseOnDemand]: 249/254 looper letters, 35 selfloop transitions, 9 changer transitions 0/249 dead transitions. [2022-07-21 09:04:55,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 249 transitions, 728 flow [2022-07-21 09:04:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:04:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:04:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-21 09:04:55,815 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-21 09:04:55,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-21 09:04:55,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-21 09:04:55,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:55,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-21 09:04:55,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,819 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,819 INFO L186 Difference]: Start difference. First operand has 235 places, 227 transitions, 546 flow. Second operand 4 states and 928 transitions. [2022-07-21 09:04:55,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 249 transitions, 728 flow [2022-07-21 09:04:55,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 249 transitions, 722 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:04:55,823 INFO L242 Difference]: Finished difference. Result has 239 places, 233 transitions, 613 flow [2022-07-21 09:04:55,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=613, PETRI_PLACES=239, PETRI_TRANSITIONS=233} [2022-07-21 09:04:55,824 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 8 predicate places. [2022-07-21 09:04:55,824 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 233 transitions, 613 flow [2022-07-21 09:04:55,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,825 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:55,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:55,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:04:55,825 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:55,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash 505081247, now seen corresponding path program 1 times [2022-07-21 09:04:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:55,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166006033] [2022-07-21 09:04:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:55,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:55,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:55,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166006033] [2022-07-21 09:04:55,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166006033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:55,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935676066] [2022-07-21 09:04:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:55,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:55,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:55,966 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) [2022-07-21 09:04:56,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:04:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:04:56,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:56,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:56,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935676066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:56,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:56,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:04:56,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593203411] [2022-07-21 09:04:56,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:56,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:04:56,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:56,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:04:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:04:56,663 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-21 09:04:56,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 233 transitions, 613 flow. Second operand has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:56,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:56,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-21 09:04:56,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:57,084 INFO L129 PetriNetUnfolder]: 138/847 cut-off events. [2022-07-21 09:04:57,085 INFO L130 PetriNetUnfolder]: For 700/714 co-relation queries the response was YES. [2022-07-21 09:04:57,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 847 events. 138/847 cut-off events. For 700/714 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3213 event pairs, 63 based on Foata normal form. 1/785 useless extension candidates. Maximal degree in co-relation 1700. Up to 246 conditions per place. [2022-07-21 09:04:57,089 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 58 selfloop transitions, 20 changer transitions 41/282 dead transitions. [2022-07-21 09:04:57,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 282 transitions, 1001 flow [2022-07-21 09:04:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:04:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:04:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3217 transitions. [2022-07-21 09:04:57,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7450208429828624 [2022-07-21 09:04:57,096 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3217 transitions. [2022-07-21 09:04:57,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3217 transitions. [2022-07-21 09:04:57,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:57,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3217 transitions. [2022-07-21 09:04:57,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 189.23529411764707) internal successors, (3217), 17 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:57,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:57,107 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:57,107 INFO L186 Difference]: Start difference. First operand has 239 places, 233 transitions, 613 flow. Second operand 17 states and 3217 transitions. [2022-07-21 09:04:57,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 282 transitions, 1001 flow [2022-07-21 09:04:57,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 282 transitions, 977 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-21 09:04:57,112 INFO L242 Difference]: Finished difference. Result has 261 places, 237 transitions, 671 flow [2022-07-21 09:04:57,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=671, PETRI_PLACES=261, PETRI_TRANSITIONS=237} [2022-07-21 09:04:57,113 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 30 predicate places. [2022-07-21 09:04:57,113 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 237 transitions, 671 flow [2022-07-21 09:04:57,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:57,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:57,114 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:57,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:57,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 09:04:57,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1762191461, now seen corresponding path program 2 times [2022-07-21 09:04:57,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:57,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549040800] [2022-07-21 09:04:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:57,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:04:57,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549040800] [2022-07-21 09:04:57,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549040800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149195694] [2022-07-21 09:04:57,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:04:57,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:57,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:57,471 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) [2022-07-21 09:04:57,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:04:57,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:04:57,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:57,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 09:04:57,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:04:57,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:04:58,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149195694] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:58,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:58,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:04:58,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692367486] [2022-07-21 09:04:58,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:58,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:04:58,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:04:58,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:04:58,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-21 09:04:58,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 237 transitions, 671 flow. Second operand has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:58,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:58,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-21 09:04:58,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:58,393 INFO L129 PetriNetUnfolder]: 168/965 cut-off events. [2022-07-21 09:04:58,394 INFO L130 PetriNetUnfolder]: For 825/841 co-relation queries the response was YES. [2022-07-21 09:04:58,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 965 events. 168/965 cut-off events. For 825/841 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4414 event pairs, 70 based on Foata normal form. 39/927 useless extension candidates. Maximal degree in co-relation 1995. Up to 234 conditions per place. [2022-07-21 09:04:58,398 INFO L132 encePairwiseOnDemand]: 236/254 looper letters, 61 selfloop transitions, 21 changer transitions 42/287 dead transitions. [2022-07-21 09:04:58,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 287 transitions, 1135 flow [2022-07-21 09:04:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:04:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:04:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3030 transitions. [2022-07-21 09:04:58,402 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7455708661417323 [2022-07-21 09:04:58,402 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3030 transitions. [2022-07-21 09:04:58,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3030 transitions. [2022-07-21 09:04:58,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:58,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3030 transitions. [2022-07-21 09:04:58,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 189.375) internal successors, (3030), 16 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:58,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:58,412 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:58,412 INFO L186 Difference]: Start difference. First operand has 261 places, 237 transitions, 671 flow. Second operand 16 states and 3030 transitions. [2022-07-21 09:04:58,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 287 transitions, 1135 flow [2022-07-21 09:04:58,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 287 transitions, 1081 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-21 09:04:58,417 INFO L242 Difference]: Finished difference. Result has 269 places, 241 transitions, 720 flow [2022-07-21 09:04:58,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=720, PETRI_PLACES=269, PETRI_TRANSITIONS=241} [2022-07-21 09:04:58,417 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 38 predicate places. [2022-07-21 09:04:58,418 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 241 transitions, 720 flow [2022-07-21 09:04:58,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:58,418 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:58,419 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:58,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:58,634 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,SelfDestructingSolverStorable10 [2022-07-21 09:04:58,634 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 642213491, now seen corresponding path program 3 times [2022-07-21 09:04:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932206536] [2022-07-21 09:04:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:03,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932206536] [2022-07-21 09:05:03,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932206536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:03,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466049929] [2022-07-21 09:05:03,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:05:03,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:03,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:03,183 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) [2022-07-21 09:05:03,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:05:03,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:05:03,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:05:03,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 09:05:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 09:05:05,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:30,648 INFO L356 Elim1Store]: treesize reduction 97, result has 81.5 percent of original size [2022-07-21 09:05:30,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 453 [2022-07-21 09:05:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 09:05:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466049929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:34,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:34,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 17, 15] total 75 [2022-07-21 09:05:34,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889783264] [2022-07-21 09:05:34,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:34,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-21 09:05:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-21 09:05:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=5072, Unknown=13, NotChecked=0, Total=5550 [2022-07-21 09:05:34,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 254 [2022-07-21 09:05:34,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 241 transitions, 720 flow. Second operand has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:34,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:34,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 254 [2022-07-21 09:05:34,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:43,507 INFO L129 PetriNetUnfolder]: 403/1559 cut-off events. [2022-07-21 09:05:43,507 INFO L130 PetriNetUnfolder]: For 1499/1515 co-relation queries the response was YES. [2022-07-21 09:05:43,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3815 conditions, 1559 events. 403/1559 cut-off events. For 1499/1515 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7962 event pairs, 68 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 3790. Up to 524 conditions per place. [2022-07-21 09:05:43,517 INFO L132 encePairwiseOnDemand]: 191/254 looper letters, 249 selfloop transitions, 131 changer transitions 36/504 dead transitions. [2022-07-21 09:05:43,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 504 transitions, 2409 flow [2022-07-21 09:05:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-21 09:05:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2022-07-21 09:05:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 11816 transitions. [2022-07-21 09:05:43,534 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.41167862866699184 [2022-07-21 09:05:43,534 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 11816 transitions. [2022-07-21 09:05:43,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 11816 transitions. [2022-07-21 09:05:43,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:43,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 11816 transitions. [2022-07-21 09:05:43,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 104.56637168141593) internal successors, (11816), 113 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:43,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:43,602 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:43,602 INFO L186 Difference]: Start difference. First operand has 269 places, 241 transitions, 720 flow. Second operand 113 states and 11816 transitions. [2022-07-21 09:05:43,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 504 transitions, 2409 flow [2022-07-21 09:05:43,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 504 transitions, 2305 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-07-21 09:05:43,613 INFO L242 Difference]: Finished difference. Result has 397 places, 349 transitions, 1528 flow [2022-07-21 09:05:43,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=1528, PETRI_PLACES=397, PETRI_TRANSITIONS=349} [2022-07-21 09:05:43,614 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 166 predicate places. [2022-07-21 09:05:43,614 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 349 transitions, 1528 flow [2022-07-21 09:05:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:43,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:43,617 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:43,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:43,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:43,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:05:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash 329244297, now seen corresponding path program 4 times [2022-07-21 09:05:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:43,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154159035] [2022-07-21 09:05:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:43,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:05:43,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:43,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154159035] [2022-07-21 09:05:43,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154159035] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:43,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677326859] [2022-07-21 09:05:43,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:05:43,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:43,950 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) [2022-07-21 09:05:43,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:05:44,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:05:44,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:05:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:05:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:05:44,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:05:44,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677326859] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:44,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:44,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-21 09:05:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320564572] [2022-07-21 09:05:44,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:44,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:05:44,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:05:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:05:44,719 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-21 09:05:44,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 349 transitions, 1528 flow. Second operand has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:44,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:44,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-21 09:05:44,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:45,368 INFO L129 PetriNetUnfolder]: 173/1156 cut-off events. [2022-07-21 09:05:45,369 INFO L130 PetriNetUnfolder]: For 1152/1166 co-relation queries the response was YES. [2022-07-21 09:05:45,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2694 conditions, 1156 events. 173/1156 cut-off events. For 1152/1166 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5226 event pairs, 47 based on Foata normal form. 11/1103 useless extension candidates. Maximal degree in co-relation 2643. Up to 271 conditions per place. [2022-07-21 09:05:45,386 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 73 selfloop transitions, 25 changer transitions 129/390 dead transitions. [2022-07-21 09:05:45,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 390 transitions, 2128 flow [2022-07-21 09:05:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:05:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:05:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4514 transitions. [2022-07-21 09:05:45,390 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.740485564304462 [2022-07-21 09:05:45,390 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4514 transitions. [2022-07-21 09:05:45,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4514 transitions. [2022-07-21 09:05:45,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:45,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4514 transitions. [2022-07-21 09:05:45,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 188.08333333333334) internal successors, (4514), 24 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:45,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:45,400 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:45,400 INFO L186 Difference]: Start difference. First operand has 397 places, 349 transitions, 1528 flow. Second operand 24 states and 4514 transitions. [2022-07-21 09:05:45,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 390 transitions, 2128 flow [2022-07-21 09:05:45,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 390 transitions, 1979 flow, removed 55 selfloop flow, removed 14 redundant places. [2022-07-21 09:05:45,410 INFO L242 Difference]: Finished difference. Result has 407 places, 256 transitions, 953 flow [2022-07-21 09:05:45,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=953, PETRI_PLACES=407, PETRI_TRANSITIONS=256} [2022-07-21 09:05:45,411 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 176 predicate places. [2022-07-21 09:05:45,411 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 256 transitions, 953 flow [2022-07-21 09:05:45,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:45,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:45,412 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:45,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:45,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:45,630 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:05:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash 60836953, now seen corresponding path program 5 times [2022-07-21 09:05:45,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:45,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104595245] [2022-07-21 09:05:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 09:05:45,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:45,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104595245] [2022-07-21 09:05:45,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104595245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:05:45,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:05:45,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:05:45,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857634939] [2022-07-21 09:05:45,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:05:45,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:05:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:05:45,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:05:45,747 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-21 09:05:45,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 256 transitions, 953 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:45,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:45,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-21 09:05:45,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:46,012 INFO L129 PetriNetUnfolder]: 337/1352 cut-off events. [2022-07-21 09:05:46,012 INFO L130 PetriNetUnfolder]: For 2093/2109 co-relation queries the response was YES. [2022-07-21 09:05:46,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 1352 events. 337/1352 cut-off events. For 2093/2109 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7178 event pairs, 79 based on Foata normal form. 33/1309 useless extension candidates. Maximal degree in co-relation 3414. Up to 207 conditions per place. [2022-07-21 09:05:46,021 INFO L132 encePairwiseOnDemand]: 251/254 looper letters, 61 selfloop transitions, 6 changer transitions 0/284 dead transitions. [2022-07-21 09:05:46,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 284 transitions, 1280 flow [2022-07-21 09:05:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:05:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:05:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-21 09:05:46,024 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-21 09:05:46,024 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-21 09:05:46,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-21 09:05:46,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:46,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-21 09:05:46,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,027 INFO L186 Difference]: Start difference. First operand has 407 places, 256 transitions, 953 flow. Second operand 4 states and 928 transitions. [2022-07-21 09:05:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 284 transitions, 1280 flow [2022-07-21 09:05:46,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 284 transitions, 1126 flow, removed 49 selfloop flow, removed 43 redundant places. [2022-07-21 09:05:46,035 INFO L242 Difference]: Finished difference. Result has 278 places, 254 transitions, 830 flow [2022-07-21 09:05:46,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=830, PETRI_PLACES=278, PETRI_TRANSITIONS=254} [2022-07-21 09:05:46,036 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 47 predicate places. [2022-07-21 09:05:46,036 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 254 transitions, 830 flow [2022-07-21 09:05:46,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:46,037 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:46,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:05:46,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:05:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:46,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1601424871, now seen corresponding path program 6 times [2022-07-21 09:05:46,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:46,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221684461] [2022-07-21 09:05:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:46,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 09:05:46,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:46,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221684461] [2022-07-21 09:05:46,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221684461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:46,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484794499] [2022-07-21 09:05:46,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:05:46,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:46,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:46,169 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) [2022-07-21 09:05:46,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:05:46,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 09:05:46,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:05:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:05:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 09:05:46,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 09:05:46,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484794499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:46,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:46,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-07-21 09:05:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784982951] [2022-07-21 09:05:46,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:05:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:05:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:05:46,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-21 09:05:46,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 254 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:46,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-21 09:05:46,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:46,864 INFO L129 PetriNetUnfolder]: 14/351 cut-off events. [2022-07-21 09:05:46,864 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-21 09:05:46,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 351 events. 14/351 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 453 event pairs, 6 based on Foata normal form. 11/353 useless extension candidates. Maximal degree in co-relation 578. Up to 47 conditions per place. [2022-07-21 09:05:46,865 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 23 selfloop transitions, 9 changer transitions 0/246 dead transitions. [2022-07-21 09:05:46,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 246 transitions, 828 flow [2022-07-21 09:05:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:05:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:05:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1338 transitions. [2022-07-21 09:05:46,867 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8779527559055118 [2022-07-21 09:05:46,867 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1338 transitions. [2022-07-21 09:05:46,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1338 transitions. [2022-07-21 09:05:46,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:46,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1338 transitions. [2022-07-21 09:05:46,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,872 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,873 INFO L186 Difference]: Start difference. First operand has 278 places, 254 transitions, 830 flow. Second operand 6 states and 1338 transitions. [2022-07-21 09:05:46,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 246 transitions, 828 flow [2022-07-21 09:05:46,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 246 transitions, 777 flow, removed 2 selfloop flow, removed 9 redundant places. [2022-07-21 09:05:46,877 INFO L242 Difference]: Finished difference. Result has 274 places, 244 transitions, 725 flow [2022-07-21 09:05:46,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=274, PETRI_TRANSITIONS=244} [2022-07-21 09:05:46,878 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 43 predicate places. [2022-07-21 09:05:46,878 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 244 transitions, 725 flow [2022-07-21 09:05:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:46,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:46,879 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:46,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:47,096 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 [2022-07-21 09:05:47,096 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:05:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:47,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1127042464, now seen corresponding path program 7 times [2022-07-21 09:05:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:47,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259911898] [2022-07-21 09:05:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:47,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:05:47,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:47,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259911898] [2022-07-21 09:05:47,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259911898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:47,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068077587] [2022-07-21 09:05:47,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:05:47,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:47,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:47,312 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) [2022-07-21 09:05:47,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:05:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:05:47,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 09:05:47,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 09:05:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068077587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:47,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:47,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2022-07-21 09:05:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033137078] [2022-07-21 09:05:47,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:47,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:05:47,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:05:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:05:47,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 254 [2022-07-21 09:05:47,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 244 transitions, 725 flow. Second operand has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:47,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:47,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 254 [2022-07-21 09:05:47,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:49,330 INFO L129 PetriNetUnfolder]: 34/848 cut-off events. [2022-07-21 09:05:49,330 INFO L130 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2022-07-21 09:05:49,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 848 events. 34/848 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3457 event pairs, 20 based on Foata normal form. 3/804 useless extension candidates. Maximal degree in co-relation 1448. Up to 58 conditions per place. [2022-07-21 09:05:49,334 INFO L132 encePairwiseOnDemand]: 223/254 looper letters, 73 selfloop transitions, 30 changer transitions 113/375 dead transitions. [2022-07-21 09:05:49,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 375 transitions, 1680 flow [2022-07-21 09:05:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 09:05:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-21 09:05:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 10761 transitions. [2022-07-21 09:05:49,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7180701988522621 [2022-07-21 09:05:49,350 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 10761 transitions. [2022-07-21 09:05:49,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 10761 transitions. [2022-07-21 09:05:49,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:49,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 10761 transitions. [2022-07-21 09:05:49,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 182.38983050847457) internal successors, (10761), 59 states have internal predecessors, (10761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:49,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:49,381 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:49,382 INFO L186 Difference]: Start difference. First operand has 274 places, 244 transitions, 725 flow. Second operand 59 states and 10761 transitions. [2022-07-21 09:05:49,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 375 transitions, 1680 flow [2022-07-21 09:05:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 375 transitions, 1643 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-21 09:05:49,389 INFO L242 Difference]: Finished difference. Result has 359 places, 252 transitions, 898 flow [2022-07-21 09:05:49,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=898, PETRI_PLACES=359, PETRI_TRANSITIONS=252} [2022-07-21 09:05:49,391 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 128 predicate places. [2022-07-21 09:05:49,391 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 252 transitions, 898 flow [2022-07-21 09:05:49,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:49,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:49,392 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:49,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:49,624 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 [2022-07-21 09:05:49,624 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:05:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash -429007627, now seen corresponding path program 8 times [2022-07-21 09:05:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:49,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164229401] [2022-07-21 09:05:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:49,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-21 09:05:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164229401] [2022-07-21 09:05:49,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164229401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601204252] [2022-07-21 09:05:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:05:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:49,862 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) [2022-07-21 09:05:49,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:05:50,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:05:50,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:05:50,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:05:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-21 09:05:50,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-21 09:05:50,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601204252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:50,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:50,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-21 09:05:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985624123] [2022-07-21 09:05:50,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:50,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:05:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:05:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:05:50,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 254 [2022-07-21 09:05:50,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 252 transitions, 898 flow. Second operand has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:50,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:50,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 254 [2022-07-21 09:05:50,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:51,344 INFO L129 PetriNetUnfolder]: 21/576 cut-off events. [2022-07-21 09:05:51,345 INFO L130 PetriNetUnfolder]: For 425/425 co-relation queries the response was YES. [2022-07-21 09:05:51,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 576 events. 21/576 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1529 event pairs, 14 based on Foata normal form. 3/554 useless extension candidates. Maximal degree in co-relation 1129. Up to 64 conditions per place. [2022-07-21 09:05:51,348 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 60 selfloop transitions, 40 changer transitions 48/309 dead transitions. [2022-07-21 09:05:51,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 309 transitions, 1503 flow [2022-07-21 09:05:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:05:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:05:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5729 transitions. [2022-07-21 09:05:51,353 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7275844551689103 [2022-07-21 09:05:51,353 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5729 transitions. [2022-07-21 09:05:51,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5729 transitions. [2022-07-21 09:05:51,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:51,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5729 transitions. [2022-07-21 09:05:51,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 184.80645161290323) internal successors, (5729), 31 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:51,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:51,363 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:51,363 INFO L186 Difference]: Start difference. First operand has 359 places, 252 transitions, 898 flow. Second operand 31 states and 5729 transitions. [2022-07-21 09:05:51,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 309 transitions, 1503 flow [2022-07-21 09:05:51,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 309 transitions, 1310 flow, removed 71 selfloop flow, removed 43 redundant places. [2022-07-21 09:05:51,370 INFO L242 Difference]: Finished difference. Result has 325 places, 256 transitions, 910 flow [2022-07-21 09:05:51,370 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=910, PETRI_PLACES=325, PETRI_TRANSITIONS=256} [2022-07-21 09:05:51,370 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 94 predicate places. [2022-07-21 09:05:51,370 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 256 transitions, 910 flow [2022-07-21 09:05:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:51,371 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:51,371 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:51,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:51,589 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:05:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1560661591, now seen corresponding path program 9 times [2022-07-21 09:05:51,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:51,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635705842] [2022-07-21 09:05:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:51,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635705842] [2022-07-21 09:05:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635705842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284901067] [2022-07-21 09:05:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:05:59,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:59,952 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) [2022-07-21 09:05:59,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:06:00,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:06:00,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 153 conjunts are in the unsatisfiable core [2022-07-21 09:06:00,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:06:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:06:18,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:06:18,465 INFO L356 Elim1Store]: treesize reduction 422, result has 34.1 percent of original size [2022-07-21 09:06:18,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 160 treesize of output 249 [2022-07-21 09:06:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 09:06:18,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:37,636 INFO L356 Elim1Store]: treesize reduction 577, result has 74.2 percent of original size [2022-07-21 09:06:37,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 291 treesize of output 1714