./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/floating_read-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/pthread-deagle/floating_read-5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:48:31,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:48:31,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:48:31,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:48:31,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:48:31,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:48:31,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:48:31,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:48:31,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:48:31,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:48:31,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:48:31,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:48:31,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:48:31,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:48:31,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:48:31,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:48:31,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:48:31,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:48:31,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:48:31,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:48:31,207 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:48:31,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:48:31,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:48:31,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:48:31,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:48:31,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:48:31,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:48:31,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:48:31,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:48:31,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:48:31,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:48:31,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:48:31,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:48:31,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:48:31,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:48:31,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:48:31,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:48:31,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:48:31,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:48:31,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:48:31,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:48:31,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:48:31,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:48:31,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:48:31,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:48:31,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:48:31,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:48:31,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:48:31,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:48:31,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:48:31,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:48:31,247 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:48:31,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:48:31,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:48:31,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:48:31,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:48:31,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:48:31,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:48:31,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:48:31,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:48:31,249 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:48:31,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:48:31,249 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:48:31,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:48:31,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:48:31,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:48:31,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:48:31,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:48:31,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:48:31,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:48:31,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:48:31,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:48:31,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:48:31,251 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:48:31,251 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:48:31,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:48:31,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d [2022-07-19 21:48:31,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:48:31,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:48:31,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:48:31,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:48:31,470 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:48:31,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/floating_read-5.i [2022-07-19 21:48:31,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a4a8c31/b94e655062884207accc4ef406891dd9/FLAG93e6ba7fc [2022-07-19 21:48:31,872 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:48:31,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i [2022-07-19 21:48:31,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a4a8c31/b94e655062884207accc4ef406891dd9/FLAG93e6ba7fc [2022-07-19 21:48:32,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a4a8c31/b94e655062884207accc4ef406891dd9 [2022-07-19 21:48:32,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:48:32,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:48:32,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:48:32,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:48:32,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:48:32,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8e2897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32, skipping insertion in model container [2022-07-19 21:48:32,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:48:32,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:48:32,485 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-19 21:48:32,492 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/pthread-deagle/floating_read-5.i[31193,31206] [2022-07-19 21:48:32,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:48:32,499 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:48:32,522 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-19 21:48:32,524 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/pthread-deagle/floating_read-5.i[31193,31206] [2022-07-19 21:48:32,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:48:32,550 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:48:32,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32 WrapperNode [2022-07-19 21:48:32,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:48:32,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:48:32,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:48:32,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:48:32,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,593 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-19 21:48:32,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:48:32,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:48:32,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:48:32,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:48:32,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:48:32,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:48:32,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:48:32,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:48:32,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (1/1) ... [2022-07-19 21:48:32,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:48:32,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:32,663 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) [2022-07-19 21:48:32,667 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 [2022-07-19 21:48:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:48:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:48:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:48:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:48:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:48:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:48:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:48:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-07-19 21:48:32,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-07-19 21:48:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:48:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:48:32,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:48:32,707 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:48:32,826 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:48:32,828 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:48:33,002 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:48:33,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:48:33,010 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:48:33,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:33 BoogieIcfgContainer [2022-07-19 21:48:33,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:48:33,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:48:33,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:48:33,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:48:33,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:48:32" (1/3) ... [2022-07-19 21:48:33,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e13c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:33, skipping insertion in model container [2022-07-19 21:48:33,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:32" (2/3) ... [2022-07-19 21:48:33,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e13c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:33, skipping insertion in model container [2022-07-19 21:48:33,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:33" (3/3) ... [2022-07-19 21:48:33,036 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-5.i [2022-07-19 21:48:33,044 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:48:33,050 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:48:33,051 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:48:33,051 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:48:33,121 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:48:33,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2022-07-19 21:48:33,229 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2022-07-19 21:48:33,229 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:48:33,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2022-07-19 21:48:33,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2022-07-19 21:48:33,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2022-07-19 21:48:33,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:48:33,290 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@af3cc93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4606fa8d [2022-07-19 21:48:33,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:48:33,320 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-19 21:48:33,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:48:33,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:33,321 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] [2022-07-19 21:48:33,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2022-07-19 21:48:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:33,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462771286] [2022-07-19 21:48:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:33,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:33,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462771286] [2022-07-19 21:48:33,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462771286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:33,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:33,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:48:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877556958] [2022-07-19 21:48:33,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:48:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:48:33,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:48:33,630 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2022-07-19 21:48:33,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:33,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2022-07-19 21:48:33,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:33,654 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2022-07-19 21:48:33,654 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:48:33,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 46 events. 0/46 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-19 21:48:33,655 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2022-07-19 21:48:33,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 85 flow [2022-07-19 21:48:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:48:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:48:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2022-07-19 21:48:33,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2022-07-19 21:48:33,665 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2022-07-19 21:48:33,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2022-07-19 21:48:33,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:33,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2022-07-19 21:48:33,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,678 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,679 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 85 flow. Second operand 2 states and 108 transitions. [2022-07-19 21:48:33,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 85 flow [2022-07-19 21:48:33,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:33,685 INFO L242 Difference]: Finished difference. Result has 43 places, 39 transitions, 83 flow [2022-07-19 21:48:33,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-07-19 21:48:33,706 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-07-19 21:48:33,706 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 83 flow [2022-07-19 21:48:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:33,707 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] [2022-07-19 21:48:33,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:48:33,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:33,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2022-07-19 21:48:33,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:33,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107862409] [2022-07-19 21:48:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:33,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107862409] [2022-07-19 21:48:33,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107862409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:33,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:33,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:33,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694593193] [2022-07-19 21:48:33,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:33,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:33,785 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2022-07-19 21:48:33,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:33,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2022-07-19 21:48:33,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:33,814 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-19 21:48:33,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:48:33,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:48:33,815 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 8 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-07-19 21:48:33,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 107 flow [2022-07-19 21:48:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2022-07-19 21:48:33,820 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2022-07-19 21:48:33,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2022-07-19 21:48:33,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2022-07-19 21:48:33,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:33,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2022-07-19 21:48:33,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,825 INFO L186 Difference]: Start difference. First operand has 43 places, 39 transitions, 83 flow. Second operand 3 states and 149 transitions. [2022-07-19 21:48:33,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 107 flow [2022-07-19 21:48:33,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:33,828 INFO L242 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2022-07-19 21:48:33,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2022-07-19 21:48:33,829 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-07-19 21:48:33,829 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2022-07-19 21:48:33,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,829 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:33,829 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] [2022-07-19 21:48:33,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:48:33,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2022-07-19 21:48:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:33,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445111506] [2022-07-19 21:48:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:33,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:33,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445111506] [2022-07-19 21:48:33,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445111506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:33,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:33,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:33,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4070052] [2022-07-19 21:48:33,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:33,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:33,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:33,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:33,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:33,900 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2022-07-19 21:48:33,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:33,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2022-07-19 21:48:33,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:33,916 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-19 21:48:33,916 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:48:33,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 43 events. 0/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-19 21:48:33,917 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-07-19 21:48:33,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 101 flow [2022-07-19 21:48:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2022-07-19 21:48:33,918 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2022-07-19 21:48:33,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2022-07-19 21:48:33,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2022-07-19 21:48:33,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:33,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2022-07-19 21:48:33,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,920 INFO L186 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 150 transitions. [2022-07-19 21:48:33,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 101 flow [2022-07-19 21:48:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:48:33,921 INFO L242 Difference]: Finished difference. Result has 47 places, 39 transitions, 95 flow [2022-07-19 21:48:33,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2022-07-19 21:48:33,922 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-07-19 21:48:33,922 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 95 flow [2022-07-19 21:48:33,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:33,923 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:33,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:48:33,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2022-07-19 21:48:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:33,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864742337] [2022-07-19 21:48:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:33,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:33,947 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:48:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:33,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:48:33,969 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:48:33,970 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:48:33,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:48:33,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:48:33,971 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:48:33,973 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:48:33,973 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:48:33,981 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:48:33,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2022-07-19 21:48:33,993 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2022-07-19 21:48:33,994 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:48:33,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-07-19 21:48:33,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2022-07-19 21:48:33,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2022-07-19 21:48:33,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:48:33,997 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@af3cc93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4606fa8d [2022-07-19 21:48:33,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:48:33,999 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-19 21:48:34,000 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:48:34,000 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,000 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] [2022-07-19 21:48:34,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash 775345522, now seen corresponding path program 1 times [2022-07-19 21:48:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678161776] [2022-07-19 21:48:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:34,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678161776] [2022-07-19 21:48:34,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678161776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:34,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:34,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:48:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981342913] [2022-07-19 21:48:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:34,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:48:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:48:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:48:34,016 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 66 [2022-07-19 21:48:34,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:34,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 66 [2022-07-19 21:48:34,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:34,024 INFO L129 PetriNetUnfolder]: 0/64 cut-off events. [2022-07-19 21:48:34,024 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:48:34,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 0/64 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 3/64 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-19 21:48:34,025 INFO L132 encePairwiseOnDemand]: 65/66 looper letters, 2 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2022-07-19 21:48:34,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 106 flow [2022-07-19 21:48:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:48:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:48:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 119 transitions. [2022-07-19 21:48:34,026 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9015151515151515 [2022-07-19 21:48:34,026 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 119 transitions. [2022-07-19 21:48:34,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 119 transitions. [2022-07-19 21:48:34,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:34,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 119 transitions. [2022-07-19 21:48:34,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,028 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,028 INFO L186 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 2 states and 119 transitions. [2022-07-19 21:48:34,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 106 flow [2022-07-19 21:48:34,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 104 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:34,029 INFO L242 Difference]: Finished difference. Result has 51 places, 45 transitions, 100 flow [2022-07-19 21:48:34,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2022-07-19 21:48:34,030 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-07-19 21:48:34,030 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 100 flow [2022-07-19 21:48:34,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,031 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] [2022-07-19 21:48:34,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:48:34,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2022-07-19 21:48:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458305376] [2022-07-19 21:48:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:34,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458305376] [2022-07-19 21:48:34,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458305376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:34,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:34,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:34,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561803974] [2022-07-19 21:48:34,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:34,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:34,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:34,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:34,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:34,050 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2022-07-19 21:48:34,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:34,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2022-07-19 21:48:34,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:34,068 INFO L129 PetriNetUnfolder]: 0/61 cut-off events. [2022-07-19 21:48:34,068 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:48:34,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 61 events. 0/61 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-19 21:48:34,069 INFO L132 encePairwiseOnDemand]: 63/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2022-07-19 21:48:34,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 134 flow [2022-07-19 21:48:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-19 21:48:34,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-19 21:48:34,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-19 21:48:34,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-19 21:48:34,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:34,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-19 21:48:34,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,072 INFO L186 Difference]: Start difference. First operand has 51 places, 45 transitions, 100 flow. Second operand 3 states and 167 transitions. [2022-07-19 21:48:34,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 134 flow [2022-07-19 21:48:34,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:34,074 INFO L242 Difference]: Finished difference. Result has 54 places, 46 transitions, 112 flow [2022-07-19 21:48:34,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2022-07-19 21:48:34,074 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2022-07-19 21:48:34,074 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 112 flow [2022-07-19 21:48:34,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,075 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] [2022-07-19 21:48:34,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:48:34,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2022-07-19 21:48:34,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188142874] [2022-07-19 21:48:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:34,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:34,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188142874] [2022-07-19 21:48:34,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188142874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:34,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:34,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:34,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730814407] [2022-07-19 21:48:34,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:34,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:34,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:34,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:34,098 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2022-07-19 21:48:34,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:34,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2022-07-19 21:48:34,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:34,113 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-19 21:48:34,113 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:48:34,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 87 events. 4/87 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 1 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 121. Up to 13 conditions per place. [2022-07-19 21:48:34,114 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-07-19 21:48:34,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 143 flow [2022-07-19 21:48:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-19 21:48:34,116 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-19 21:48:34,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-19 21:48:34,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-19 21:48:34,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:34,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-19 21:48:34,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,117 INFO L186 Difference]: Start difference. First operand has 54 places, 46 transitions, 112 flow. Second operand 3 states and 167 transitions. [2022-07-19 21:48:34,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 143 flow [2022-07-19 21:48:34,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:34,119 INFO L242 Difference]: Finished difference. Result has 56 places, 48 transitions, 129 flow [2022-07-19 21:48:34,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2022-07-19 21:48:34,120 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2022-07-19 21:48:34,120 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 129 flow [2022-07-19 21:48:34,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,120 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] [2022-07-19 21:48:34,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:48:34,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2022-07-19 21:48:34,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252409209] [2022-07-19 21:48:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252409209] [2022-07-19 21:48:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252409209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637802640] [2022-07-19 21:48:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:34,176 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) [2022-07-19 21:48:34,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:48:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:48:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637802640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:34,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:34,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:48:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394963596] [2022-07-19 21:48:34,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:48:34,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:48:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:48:34,311 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2022-07-19 21:48:34,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 129 flow. Second operand has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:34,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2022-07-19 21:48:34,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:34,362 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2022-07-19 21:48:34,362 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:48:34,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 59 events. 1/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 91. Up to 5 conditions per place. [2022-07-19 21:48:34,363 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 9 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-07-19 21:48:34,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 163 flow [2022-07-19 21:48:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:48:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:48:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2022-07-19 21:48:34,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-07-19 21:48:34,365 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2022-07-19 21:48:34,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2022-07-19 21:48:34,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:34,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2022-07-19 21:48:34,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,367 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,367 INFO L186 Difference]: Start difference. First operand has 56 places, 48 transitions, 129 flow. Second operand 9 states and 468 transitions. [2022-07-19 21:48:34,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 163 flow [2022-07-19 21:48:34,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:34,369 INFO L242 Difference]: Finished difference. Result has 60 places, 47 transitions, 134 flow [2022-07-19 21:48:34,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2022-07-19 21:48:34,370 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2022-07-19 21:48:34,370 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 134 flow [2022-07-19 21:48:34,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,370 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,371 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:34,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:48:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:34,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2022-07-19 21:48:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178923546] [2022-07-19 21:48:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:34,613 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:48:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:34,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:48:34,627 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:48:34,627 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:48:34,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:48:34,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:48:34,628 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:48:34,628 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:48:34,628 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:48:34,641 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:48:34,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2022-07-19 21:48:34,658 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2022-07-19 21:48:34,664 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:48:34,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 507 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2022-07-19 21:48:34,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2022-07-19 21:48:34,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 52 transitions, 125 flow [2022-07-19 21:48:34,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:48:34,670 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@af3cc93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4606fa8d [2022-07-19 21:48:34,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:48:34,672 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-19 21:48:34,672 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:48:34,672 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,672 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] [2022-07-19 21:48:34,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2022-07-19 21:48:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599396554] [2022-07-19 21:48:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599396554] [2022-07-19 21:48:34,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599396554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:34,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:34,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:34,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870051443] [2022-07-19 21:48:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:34,717 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-19 21:48:34,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:34,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-19 21:48:34,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:34,734 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2022-07-19 21:48:34,734 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:48:34,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 79 events. 0/79 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-19 21:48:34,735 INFO L132 encePairwiseOnDemand]: 69/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-07-19 21:48:34,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 159 flow [2022-07-19 21:48:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2022-07-19 21:48:34,736 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8447488584474886 [2022-07-19 21:48:34,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2022-07-19 21:48:34,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2022-07-19 21:48:34,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:34,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2022-07-19 21:48:34,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,738 INFO L186 Difference]: Start difference. First operand has 58 places, 52 transitions, 125 flow. Second operand 3 states and 185 transitions. [2022-07-19 21:48:34,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 159 flow [2022-07-19 21:48:34,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 153 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:34,739 INFO L242 Difference]: Finished difference. Result has 61 places, 52 transitions, 129 flow [2022-07-19 21:48:34,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2022-07-19 21:48:34,740 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-07-19 21:48:34,740 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 129 flow [2022-07-19 21:48:34,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,741 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,741 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] [2022-07-19 21:48:34,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:48:34,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2022-07-19 21:48:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24873153] [2022-07-19 21:48:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:34,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:34,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24873153] [2022-07-19 21:48:34,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24873153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:34,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671454781] [2022-07-19 21:48:34,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:34,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:34,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:34,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-19 21:48:34,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:34,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-19 21:48:34,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:34,782 INFO L129 PetriNetUnfolder]: 21/145 cut-off events. [2022-07-19 21:48:34,782 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-19 21:48:34,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 145 events. 21/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 403 event pairs, 7 based on Foata normal form. 3/140 useless extension candidates. Maximal degree in co-relation 185. Up to 44 conditions per place. [2022-07-19 21:48:34,783 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2022-07-19 21:48:34,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 177 flow [2022-07-19 21:48:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-07-19 21:48:34,791 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2022-07-19 21:48:34,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-07-19 21:48:34,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-07-19 21:48:34,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:34,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-07-19 21:48:34,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,793 INFO L186 Difference]: Start difference. First operand has 61 places, 52 transitions, 129 flow. Second operand 3 states and 183 transitions. [2022-07-19 21:48:34,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 177 flow [2022-07-19 21:48:34,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:34,795 INFO L242 Difference]: Finished difference. Result has 63 places, 55 transitions, 153 flow [2022-07-19 21:48:34,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2022-07-19 21:48:34,796 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2022-07-19 21:48:34,796 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 153 flow [2022-07-19 21:48:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:34,796 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] [2022-07-19 21:48:34,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:48:34,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2022-07-19 21:48:34,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:34,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289876277] [2022-07-19 21:48:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289876277] [2022-07-19 21:48:34,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289876277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60856238] [2022-07-19 21:48:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:34,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:34,829 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) [2022-07-19 21:48:34,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:48:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:48:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:34,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60856238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:34,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:34,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:48:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424023355] [2022-07-19 21:48:34,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:48:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:48:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:48:34,982 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2022-07-19 21:48:34,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:34,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:34,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2022-07-19 21:48:34,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:35,065 INFO L129 PetriNetUnfolder]: 14/115 cut-off events. [2022-07-19 21:48:35,065 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:48:35,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 115 events. 14/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 6 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 130. Up to 29 conditions per place. [2022-07-19 21:48:35,067 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2022-07-19 21:48:35,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 219 flow [2022-07-19 21:48:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:48:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:48:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2022-07-19 21:48:35,069 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2022-07-19 21:48:35,070 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2022-07-19 21:48:35,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2022-07-19 21:48:35,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:35,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2022-07-19 21:48:35,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,072 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,072 INFO L186 Difference]: Start difference. First operand has 63 places, 55 transitions, 153 flow. Second operand 9 states and 519 transitions. [2022-07-19 21:48:35,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 219 flow [2022-07-19 21:48:35,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:35,075 INFO L242 Difference]: Finished difference. Result has 73 places, 61 transitions, 199 flow [2022-07-19 21:48:35,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2022-07-19 21:48:35,076 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 15 predicate places. [2022-07-19 21:48:35,076 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 199 flow [2022-07-19 21:48:35,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,077 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:35,077 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:35,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:35,291 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,SelfDestructingSolverStorable11 [2022-07-19 21:48:35,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2022-07-19 21:48:35,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:35,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712561983] [2022-07-19 21:48:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:35,306 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:48:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:35,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:48:35,318 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:48:35,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:48:35,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:48:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:48:35,319 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:48:35,319 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:48:35,319 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:48:35,328 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:48:35,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2022-07-19 21:48:35,349 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2022-07-19 21:48:35,349 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:48:35,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1158 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2022-07-19 21:48:35,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2022-07-19 21:48:35,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 148 flow [2022-07-19 21:48:35,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:48:35,352 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@af3cc93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4606fa8d [2022-07-19 21:48:35,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:48:35,353 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-19 21:48:35,353 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:48:35,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:35,353 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] [2022-07-19 21:48:35,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2022-07-19 21:48:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:35,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086100437] [2022-07-19 21:48:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:35,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:35,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086100437] [2022-07-19 21:48:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086100437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:35,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:35,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800793372] [2022-07-19 21:48:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:35,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:35,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2022-07-19 21:48:35,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:35,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2022-07-19 21:48:35,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:35,386 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2022-07-19 21:48:35,386 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:48:35,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 97 events. 0/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-19 21:48:35,387 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-07-19 21:48:35,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 184 flow [2022-07-19 21:48:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2022-07-19 21:48:35,388 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8375 [2022-07-19 21:48:35,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2022-07-19 21:48:35,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2022-07-19 21:48:35,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:35,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2022-07-19 21:48:35,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,390 INFO L186 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 3 states and 201 transitions. [2022-07-19 21:48:35,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 184 flow [2022-07-19 21:48:35,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 172 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:35,391 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 146 flow [2022-07-19 21:48:35,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2022-07-19 21:48:35,392 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2022-07-19 21:48:35,392 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 146 flow [2022-07-19 21:48:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:35,393 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:35,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:48:35,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2022-07-19 21:48:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:35,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219937752] [2022-07-19 21:48:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:35,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:35,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219937752] [2022-07-19 21:48:35,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219937752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:35,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:35,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:35,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252411695] [2022-07-19 21:48:35,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:35,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:35,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:35,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-19 21:48:35,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:35,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-19 21:48:35,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:35,465 INFO L129 PetriNetUnfolder]: 73/359 cut-off events. [2022-07-19 21:48:35,465 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-07-19 21:48:35,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 359 events. 73/359 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1605 event pairs, 35 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 523. Up to 126 conditions per place. [2022-07-19 21:48:35,468 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2022-07-19 21:48:35,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 211 flow [2022-07-19 21:48:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2022-07-19 21:48:35,470 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2022-07-19 21:48:35,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2022-07-19 21:48:35,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2022-07-19 21:48:35,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:35,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2022-07-19 21:48:35,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,471 INFO L186 Difference]: Start difference. First operand has 69 places, 58 transitions, 146 flow. Second operand 3 states and 199 transitions. [2022-07-19 21:48:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 211 flow [2022-07-19 21:48:35,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:35,473 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 177 flow [2022-07-19 21:48:35,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2022-07-19 21:48:35,474 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2022-07-19 21:48:35,474 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 177 flow [2022-07-19 21:48:35,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,474 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:35,475 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] [2022-07-19 21:48:35,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:48:35,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2022-07-19 21:48:35,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:35,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801961339] [2022-07-19 21:48:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:35,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:35,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801961339] [2022-07-19 21:48:35,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801961339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59867419] [2022-07-19 21:48:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:35,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:35,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:35,513 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) [2022-07-19 21:48:35,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:48:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:48:35,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:35,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:35,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59867419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:35,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:35,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:48:35,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919701242] [2022-07-19 21:48:35,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:35,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:48:35,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:35,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:48:35,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:48:35,619 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-19 21:48:35,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 177 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:35,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-19 21:48:35,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:35,684 INFO L129 PetriNetUnfolder]: 54/233 cut-off events. [2022-07-19 21:48:35,684 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:48:35,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 233 events. 54/233 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 824 event pairs, 28 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 324. Up to 92 conditions per place. [2022-07-19 21:48:35,686 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2022-07-19 21:48:35,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 245 flow [2022-07-19 21:48:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:48:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:48:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2022-07-19 21:48:35,688 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2022-07-19 21:48:35,688 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2022-07-19 21:48:35,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2022-07-19 21:48:35,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:35,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2022-07-19 21:48:35,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.77777777777778) internal successors, (565), 9 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,691 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,691 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 177 flow. Second operand 9 states and 565 transitions. [2022-07-19 21:48:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 245 flow [2022-07-19 21:48:35,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:35,693 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 222 flow [2022-07-19 21:48:35,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2022-07-19 21:48:35,693 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2022-07-19 21:48:35,693 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 222 flow [2022-07-19 21:48:35,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:35,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:35,694 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:35,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:35,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:35,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:35,913 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2022-07-19 21:48:35,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:35,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383593528] [2022-07-19 21:48:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:35,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 21:48:36,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:36,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383593528] [2022-07-19 21:48:36,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383593528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:36,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166574080] [2022-07-19 21:48:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:36,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:36,019 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) [2022-07-19 21:48:36,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:48:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:48:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 21:48:36,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 21:48:36,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166574080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:36,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:36,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-19 21:48:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800972127] [2022-07-19 21:48:36,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:36,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:48:36,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:48:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:48:36,229 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-19 21:48:36,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 222 flow. Second operand has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:36,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:36,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-19 21:48:36,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:36,690 INFO L129 PetriNetUnfolder]: 768/1923 cut-off events. [2022-07-19 21:48:36,690 INFO L130 PetriNetUnfolder]: For 1173/1181 co-relation queries the response was YES. [2022-07-19 21:48:36,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4592 conditions, 1923 events. 768/1923 cut-off events. For 1173/1181 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12729 event pairs, 55 based on Foata normal form. 13/1936 useless extension candidates. Maximal degree in co-relation 1670. Up to 663 conditions per place. [2022-07-19 21:48:36,706 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2022-07-19 21:48:36,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 999 flow [2022-07-19 21:48:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 21:48:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-19 21:48:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2022-07-19 21:48:36,709 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2022-07-19 21:48:36,709 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2022-07-19 21:48:36,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2022-07-19 21:48:36,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:36,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2022-07-19 21:48:36,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:36,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:36,714 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:36,714 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 222 flow. Second operand 19 states and 1082 transitions. [2022-07-19 21:48:36,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 999 flow [2022-07-19 21:48:36,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 971 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:36,719 INFO L242 Difference]: Finished difference. Result has 100 places, 121 transitions, 607 flow [2022-07-19 21:48:36,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=607, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2022-07-19 21:48:36,720 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2022-07-19 21:48:36,720 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 607 flow [2022-07-19 21:48:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:36,721 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:36,721 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:36,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 21:48:36,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:48:36,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1611844105, now seen corresponding path program 1 times [2022-07-19 21:48:36,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:36,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709184353] [2022-07-19 21:48:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:36,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:37,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709184353] [2022-07-19 21:48:37,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709184353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145440781] [2022-07-19 21:48:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:37,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:37,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:37,009 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) [2022-07-19 21:48:37,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:48:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:48:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:37,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:37,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145440781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:37,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:37,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-19 21:48:37,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485772367] [2022-07-19 21:48:37,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:48:37,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:48:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:48:37,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-19 21:48:37,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 607 flow. Second operand has 20 states, 20 states have (on average 53.2) internal successors, (1064), 20 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:37,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:37,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-19 21:48:37,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:38,252 INFO L129 PetriNetUnfolder]: 1764/4221 cut-off events. [2022-07-19 21:48:38,253 INFO L130 PetriNetUnfolder]: For 4672/4682 co-relation queries the response was YES. [2022-07-19 21:48:38,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12332 conditions, 4221 events. 1764/4221 cut-off events. For 4672/4682 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33221 event pairs, 62 based on Foata normal form. 28/4249 useless extension candidates. Maximal degree in co-relation 4743. Up to 1292 conditions per place. [2022-07-19 21:48:38,282 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/337 dead transitions. [2022-07-19 21:48:38,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 337 transitions, 2519 flow [2022-07-19 21:48:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 21:48:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-19 21:48:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2022-07-19 21:48:38,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2022-07-19 21:48:38,287 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2022-07-19 21:48:38,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2022-07-19 21:48:38,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:38,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2022-07-19 21:48:38,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 54.24390243902439) internal successors, (2224), 41 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:38,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:38,295 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:38,295 INFO L186 Difference]: Start difference. First operand has 100 places, 121 transitions, 607 flow. Second operand 41 states and 2224 transitions. [2022-07-19 21:48:38,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 337 transitions, 2519 flow [2022-07-19 21:48:38,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2497 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-19 21:48:38,311 INFO L242 Difference]: Finished difference. Result has 140 places, 255 transitions, 1863 flow [2022-07-19 21:48:38,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1863, PETRI_PLACES=140, PETRI_TRANSITIONS=255} [2022-07-19 21:48:38,311 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2022-07-19 21:48:38,311 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 255 transitions, 1863 flow [2022-07-19 21:48:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.2) internal successors, (1064), 20 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:38,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:38,312 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:38,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:38,529 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,SelfDestructingSolverStorable17 [2022-07-19 21:48:38,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2022-07-19 21:48:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:38,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380582507] [2022-07-19 21:48:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:38,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380582507] [2022-07-19 21:48:38,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380582507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2637855] [2022-07-19 21:48:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:38,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:38,611 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) [2022-07-19 21:48:38,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:48:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 21:48:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:38,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:38,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2637855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:38,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:38,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 21 [2022-07-19 21:48:38,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110312225] [2022-07-19 21:48:38,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:48:38,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:48:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:48:38,882 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-19 21:48:38,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 255 transitions, 1863 flow. Second operand has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:38,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:38,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-19 21:48:38,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:40,408 INFO L129 PetriNetUnfolder]: 2712/6242 cut-off events. [2022-07-19 21:48:40,408 INFO L130 PetriNetUnfolder]: For 14537/14639 co-relation queries the response was YES. [2022-07-19 21:48:40,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20126 conditions, 6242 events. 2712/6242 cut-off events. For 14537/14639 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 51013 event pairs, 0 based on Foata normal form. 295/6536 useless extension candidates. Maximal degree in co-relation 9511. Up to 1549 conditions per place. [2022-07-19 21:48:40,468 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 380 selfloop transitions, 600 changer transitions 0/1041 dead transitions. [2022-07-19 21:48:40,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1041 transitions, 10637 flow [2022-07-19 21:48:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 21:48:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-19 21:48:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2022-07-19 21:48:40,473 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2022-07-19 21:48:40,473 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2022-07-19 21:48:40,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2022-07-19 21:48:40,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:40,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2022-07-19 21:48:40,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 54.71186440677966) internal successors, (3228), 59 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,484 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,484 INFO L186 Difference]: Start difference. First operand has 140 places, 255 transitions, 1863 flow. Second operand 59 states and 3228 transitions. [2022-07-19 21:48:40,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1041 transitions, 10637 flow [2022-07-19 21:48:40,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1041 transitions, 10210 flow, removed 15 selfloop flow, removed 15 redundant places. [2022-07-19 21:48:40,552 INFO L242 Difference]: Finished difference. Result has 187 places, 737 transitions, 6892 flow [2022-07-19 21:48:40,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=6892, PETRI_PLACES=187, PETRI_TRANSITIONS=737} [2022-07-19 21:48:40,553 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2022-07-19 21:48:40,553 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 737 transitions, 6892 flow [2022-07-19 21:48:40,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,554 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:40,554 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:40,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:40,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:40,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2022-07-19 21:48:40,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:40,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279046481] [2022-07-19 21:48:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:40,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:40,784 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:48:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:48:40,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:48:40,794 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:48:40,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:48:40,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:48:40,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:48:40,794 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:40,795 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:48:40,795 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:48:40,804 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-19 21:48:40,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2022-07-19 21:48:40,870 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2022-07-19 21:48:40,871 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-19 21:48:40,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2760 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2022-07-19 21:48:40,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2022-07-19 21:48:40,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 64 transitions, 173 flow [2022-07-19 21:48:40,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:48:40,873 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@af3cc93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4606fa8d [2022-07-19 21:48:40,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:48:40,875 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-19 21:48:40,875 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:48:40,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:40,875 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] [2022-07-19 21:48:40,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2022-07-19 21:48:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55311917] [2022-07-19 21:48:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:40,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:40,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55311917] [2022-07-19 21:48:40,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55311917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:40,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:40,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:48:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334320985] [2022-07-19 21:48:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:40,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:48:40,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:48:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:48:40,884 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2022-07-19 21:48:40,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 173 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:40,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2022-07-19 21:48:40,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:40,893 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2022-07-19 21:48:40,893 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-07-19 21:48:40,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 118 events. 0/118 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 6/118 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:48:40,894 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2022-07-19 21:48:40,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 181 flow [2022-07-19 21:48:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:48:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:48:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-07-19 21:48:40,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2022-07-19 21:48:40,895 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-07-19 21:48:40,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-07-19 21:48:40,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:40,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-07-19 21:48:40,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,896 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,896 INFO L186 Difference]: Start difference. First operand has 74 places, 64 transitions, 173 flow. Second operand 2 states and 152 transitions. [2022-07-19 21:48:40,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 181 flow [2022-07-19 21:48:40,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 161 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:40,897 INFO L242 Difference]: Finished difference. Result has 75 places, 63 transitions, 151 flow [2022-07-19 21:48:40,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=151, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2022-07-19 21:48:40,898 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-07-19 21:48:40,898 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 151 flow [2022-07-19 21:48:40,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,898 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:40,898 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] [2022-07-19 21:48:40,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 21:48:40,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2022-07-19 21:48:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:40,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302331864] [2022-07-19 21:48:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:40,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:40,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302331864] [2022-07-19 21:48:40,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302331864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:40,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:40,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:40,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493586280] [2022-07-19 21:48:40,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:40,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:40,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:40,913 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2022-07-19 21:48:40,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:40,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2022-07-19 21:48:40,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:40,930 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2022-07-19 21:48:40,930 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:48:40,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 115 events. 0/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:48:40,930 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-07-19 21:48:40,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 191 flow [2022-07-19 21:48:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-19 21:48:40,931 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-19 21:48:40,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-19 21:48:40,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-19 21:48:40,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:40,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-19 21:48:40,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,933 INFO L186 Difference]: Start difference. First operand has 75 places, 63 transitions, 151 flow. Second operand 3 states and 215 transitions. [2022-07-19 21:48:40,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 191 flow [2022-07-19 21:48:40,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:40,934 INFO L242 Difference]: Finished difference. Result has 78 places, 64 transitions, 163 flow [2022-07-19 21:48:40,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2022-07-19 21:48:40,934 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-07-19 21:48:40,934 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 163 flow [2022-07-19 21:48:40,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,935 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:40,935 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] [2022-07-19 21:48:40,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 21:48:40,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2022-07-19 21:48:40,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:40,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571561632] [2022-07-19 21:48:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:40,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571561632] [2022-07-19 21:48:40,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571561632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:40,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:40,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286103464] [2022-07-19 21:48:40,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:40,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:40,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:40,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:40,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:40,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2022-07-19 21:48:40,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:40,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:40,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2022-07-19 21:48:40,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:41,005 INFO L129 PetriNetUnfolder]: 212/733 cut-off events. [2022-07-19 21:48:41,006 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-07-19 21:48:41,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 733 events. 212/733 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4075 event pairs, 118 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 1195. Up to 327 conditions per place. [2022-07-19 21:48:41,010 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2022-07-19 21:48:41,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 245 flow [2022-07-19 21:48:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-19 21:48:41,011 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-19 21:48:41,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-19 21:48:41,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-19 21:48:41,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:41,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-19 21:48:41,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,012 INFO L186 Difference]: Start difference. First operand has 78 places, 64 transitions, 163 flow. Second operand 3 states and 215 transitions. [2022-07-19 21:48:41,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 245 flow [2022-07-19 21:48:41,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:41,014 INFO L242 Difference]: Finished difference. Result has 80 places, 69 transitions, 201 flow [2022-07-19 21:48:41,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2022-07-19 21:48:41,014 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-07-19 21:48:41,015 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 201 flow [2022-07-19 21:48:41,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,015 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:41,015 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] [2022-07-19 21:48:41,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 21:48:41,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2022-07-19 21:48:41,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:41,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179333704] [2022-07-19 21:48:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179333704] [2022-07-19 21:48:41,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179333704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036015333] [2022-07-19 21:48:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:41,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:41,039 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) [2022-07-19 21:48:41,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:48:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:48:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:41,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:41,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036015333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:41,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:41,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:48:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261444128] [2022-07-19 21:48:41,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:48:41,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:48:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:48:41,134 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-19 21:48:41,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:41,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-19 21:48:41,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:41,221 INFO L129 PetriNetUnfolder]: 161/489 cut-off events. [2022-07-19 21:48:41,221 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:48:41,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 489 events. 161/489 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2395 event pairs, 94 based on Foata normal form. 2/445 useless extension candidates. Maximal degree in co-relation 801. Up to 246 conditions per place. [2022-07-19 21:48:41,223 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2022-07-19 21:48:41,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 271 flow [2022-07-19 21:48:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:48:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:48:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2022-07-19 21:48:41,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2022-07-19 21:48:41,225 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2022-07-19 21:48:41,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2022-07-19 21:48:41,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:41,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2022-07-19 21:48:41,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,227 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,227 INFO L186 Difference]: Start difference. First operand has 80 places, 69 transitions, 201 flow. Second operand 9 states and 611 transitions. [2022-07-19 21:48:41,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 271 flow [2022-07-19 21:48:41,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:41,229 INFO L242 Difference]: Finished difference. Result has 90 places, 75 transitions, 245 flow [2022-07-19 21:48:41,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=245, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2022-07-19 21:48:41,229 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2022-07-19 21:48:41,229 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 245 flow [2022-07-19 21:48:41,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,230 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:41,230 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:41,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:41,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:41,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2022-07-19 21:48:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:41,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515894565] [2022-07-19 21:48:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 21:48:41,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515894565] [2022-07-19 21:48:41,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515894565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274360234] [2022-07-19 21:48:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:41,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:41,488 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) [2022-07-19 21:48:41,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:48:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:48:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:41,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:41,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274360234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:41,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:41,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2022-07-19 21:48:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948845260] [2022-07-19 21:48:41,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:48:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:48:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:48:41,688 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-19 21:48:41,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 245 flow. Second operand has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:41,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:41,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-19 21:48:41,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:43,138 INFO L129 PetriNetUnfolder]: 2264/4343 cut-off events. [2022-07-19 21:48:43,139 INFO L130 PetriNetUnfolder]: For 2428/2428 co-relation queries the response was YES. [2022-07-19 21:48:43,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11220 conditions, 4343 events. 2264/4343 cut-off events. For 2428/2428 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 28570 event pairs, 78 based on Foata normal form. 74/4417 useless extension candidates. Maximal degree in co-relation 11207. Up to 1984 conditions per place. [2022-07-19 21:48:43,171 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 171 selfloop transitions, 243 changer transitions 0/454 dead transitions. [2022-07-19 21:48:43,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 454 transitions, 2650 flow [2022-07-19 21:48:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-19 21:48:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-07-19 21:48:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4667 transitions. [2022-07-19 21:48:43,177 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6790339007711335 [2022-07-19 21:48:43,177 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4667 transitions. [2022-07-19 21:48:43,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4667 transitions. [2022-07-19 21:48:43,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:43,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4667 transitions. [2022-07-19 21:48:43,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 59.075949367088604) internal successors, (4667), 79 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:43,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:43,190 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:43,190 INFO L186 Difference]: Start difference. First operand has 90 places, 75 transitions, 245 flow. Second operand 79 states and 4667 transitions. [2022-07-19 21:48:43,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 454 transitions, 2650 flow [2022-07-19 21:48:43,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 454 transitions, 2598 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:43,199 INFO L242 Difference]: Finished difference. Result has 193 places, 311 transitions, 1969 flow [2022-07-19 21:48:43,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=1969, PETRI_PLACES=193, PETRI_TRANSITIONS=311} [2022-07-19 21:48:43,200 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 119 predicate places. [2022-07-19 21:48:43,200 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 311 transitions, 1969 flow [2022-07-19 21:48:43,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:43,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:43,201 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:43,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:43,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 21:48:43,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2022-07-19 21:48:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879708449] [2022-07-19 21:48:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 88 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:43,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:43,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879708449] [2022-07-19 21:48:43,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879708449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:43,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566686634] [2022-07-19 21:48:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:43,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:43,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:43,516 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:43,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:48:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 21:48:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:43,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:43,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566686634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:43,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:48:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-19 21:48:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843432756] [2022-07-19 21:48:43,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:43,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:48:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:48:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:48:43,699 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-19 21:48:43,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 311 transitions, 1969 flow. Second operand has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:43,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:43,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-19 21:48:43,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:44,242 INFO L129 PetriNetUnfolder]: 971/2563 cut-off events. [2022-07-19 21:48:44,242 INFO L130 PetriNetUnfolder]: For 26892/27559 co-relation queries the response was YES. [2022-07-19 21:48:44,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12027 conditions, 2563 events. 971/2563 cut-off events. For 26892/27559 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18930 event pairs, 217 based on Foata normal form. 390/2836 useless extension candidates. Maximal degree in co-relation 11987. Up to 1049 conditions per place. [2022-07-19 21:48:44,276 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 17 selfloop transitions, 82 changer transitions 0/311 dead transitions. [2022-07-19 21:48:44,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 311 transitions, 2137 flow [2022-07-19 21:48:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:48:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:48:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1204 transitions. [2022-07-19 21:48:44,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2022-07-19 21:48:44,279 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1204 transitions. [2022-07-19 21:48:44,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1204 transitions. [2022-07-19 21:48:44,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:44,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1204 transitions. [2022-07-19 21:48:44,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:44,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:44,282 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:44,282 INFO L186 Difference]: Start difference. First operand has 193 places, 311 transitions, 1969 flow. Second operand 18 states and 1204 transitions. [2022-07-19 21:48:44,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 311 transitions, 2137 flow [2022-07-19 21:48:44,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 311 transitions, 1953 flow, removed 27 selfloop flow, removed 12 redundant places. [2022-07-19 21:48:44,331 INFO L242 Difference]: Finished difference. Result has 197 places, 304 transitions, 1885 flow [2022-07-19 21:48:44,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1885, PETRI_PLACES=197, PETRI_TRANSITIONS=304} [2022-07-19 21:48:44,331 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 123 predicate places. [2022-07-19 21:48:44,331 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 304 transitions, 1885 flow [2022-07-19 21:48:44,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:44,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:44,332 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:44,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:44,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 21:48:44,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash -870176612, now seen corresponding path program 1 times [2022-07-19 21:48:44,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:44,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840890314] [2022-07-19 21:48:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:44,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 21:48:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840890314] [2022-07-19 21:48:44,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840890314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625932898] [2022-07-19 21:48:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:44,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:44,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:44,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:44,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:48:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:48:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 21:48:44,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 21:48:45,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625932898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:45,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:45,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-19 21:48:45,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774532283] [2022-07-19 21:48:45,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:45,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:48:45,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:48:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:48:45,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-19 21:48:45,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 304 transitions, 1885 flow. Second operand has 20 states, 20 states have (on average 57.1) internal successors, (1142), 20 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:45,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:45,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-19 21:48:45,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:46,523 INFO L129 PetriNetUnfolder]: 4041/7980 cut-off events. [2022-07-19 21:48:46,523 INFO L130 PetriNetUnfolder]: For 72973/72994 co-relation queries the response was YES. [2022-07-19 21:48:46,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37943 conditions, 7980 events. 4041/7980 cut-off events. For 72973/72994 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 59649 event pairs, 68 based on Foata normal form. 44/8024 useless extension candidates. Maximal degree in co-relation 37905. Up to 3105 conditions per place. [2022-07-19 21:48:46,673 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 333 selfloop transitions, 374 changer transitions 0/794 dead transitions. [2022-07-19 21:48:46,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 794 transitions, 7248 flow [2022-07-19 21:48:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 21:48:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-19 21:48:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2406 transitions. [2022-07-19 21:48:46,678 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6745164003364171 [2022-07-19 21:48:46,678 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2406 transitions. [2022-07-19 21:48:46,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2406 transitions. [2022-07-19 21:48:46,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:46,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2406 transitions. [2022-07-19 21:48:46,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.68292682926829) internal successors, (2406), 41 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:46,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:46,689 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:46,689 INFO L186 Difference]: Start difference. First operand has 197 places, 304 transitions, 1885 flow. Second operand 41 states and 2406 transitions. [2022-07-19 21:48:46,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 794 transitions, 7248 flow [2022-07-19 21:48:46,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 794 transitions, 6504 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-07-19 21:48:46,881 INFO L242 Difference]: Finished difference. Result has 224 places, 566 transitions, 4395 flow [2022-07-19 21:48:46,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4395, PETRI_PLACES=224, PETRI_TRANSITIONS=566} [2022-07-19 21:48:46,882 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 150 predicate places. [2022-07-19 21:48:46,882 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 566 transitions, 4395 flow [2022-07-19 21:48:46,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.1) internal successors, (1142), 20 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:46,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:46,883 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:46,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:47,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 21:48:47,108 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1484109075, now seen corresponding path program 1 times [2022-07-19 21:48:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:47,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381386633] [2022-07-19 21:48:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 21:48:47,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381386633] [2022-07-19 21:48:47,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381386633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136099160] [2022-07-19 21:48:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:47,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:47,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:47,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:47,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:48:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 21:48:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 21:48:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 21:48:47,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136099160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:47,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:47,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-07-19 21:48:47,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485272936] [2022-07-19 21:48:47,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:47,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:48:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:48:47,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:48:47,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-19 21:48:47,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 566 transitions, 4395 flow. Second operand has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:47,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:47,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-19 21:48:47,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:50,908 INFO L129 PetriNetUnfolder]: 7788/15587 cut-off events. [2022-07-19 21:48:50,909 INFO L130 PetriNetUnfolder]: For 168464/168549 co-relation queries the response was YES. [2022-07-19 21:48:51,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76797 conditions, 15587 events. 7788/15587 cut-off events. For 168464/168549 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 132285 event pairs, 95 based on Foata normal form. 90/15672 useless extension candidates. Maximal degree in co-relation 76757. Up to 5383 conditions per place. [2022-07-19 21:48:51,102 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 392 selfloop transitions, 859 changer transitions 0/1356 dead transitions. [2022-07-19 21:48:51,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1356 transitions, 14830 flow [2022-07-19 21:48:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 21:48:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-19 21:48:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3846 transitions. [2022-07-19 21:48:51,107 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.680106100795756 [2022-07-19 21:48:51,107 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3846 transitions. [2022-07-19 21:48:51,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3846 transitions. [2022-07-19 21:48:51,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:51,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3846 transitions. [2022-07-19 21:48:51,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 59.16923076923077) internal successors, (3846), 65 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:51,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:51,119 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:51,119 INFO L186 Difference]: Start difference. First operand has 224 places, 566 transitions, 4395 flow. Second operand 65 states and 3846 transitions. [2022-07-19 21:48:51,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1356 transitions, 14830 flow [2022-07-19 21:48:51,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1356 transitions, 14017 flow, removed 233 selfloop flow, removed 10 redundant places. [2022-07-19 21:48:51,944 INFO L242 Difference]: Finished difference. Result has 286 places, 1129 transitions, 11002 flow [2022-07-19 21:48:51,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11002, PETRI_PLACES=286, PETRI_TRANSITIONS=1129} [2022-07-19 21:48:51,945 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 212 predicate places. [2022-07-19 21:48:51,945 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1129 transitions, 11002 flow [2022-07-19 21:48:51,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:51,946 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:51,946 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:51,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:52,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 21:48:52,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1549657633, now seen corresponding path program 1 times [2022-07-19 21:48:52,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:52,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028889852] [2022-07-19 21:48:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:52,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:52,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028889852] [2022-07-19 21:48:52,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028889852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:52,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769717033] [2022-07-19 21:48:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:52,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:52,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:52,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:48:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:52,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:48:52,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:52,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769717033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:52,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:52,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-07-19 21:48:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404982300] [2022-07-19 21:48:52,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:52,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:48:52,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:48:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:48:52,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-19 21:48:52,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1129 transitions, 11002 flow. Second operand has 23 states, 23 states have (on average 57.26086956521739) internal successors, (1317), 23 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:52,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:52,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-19 21:48:52,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:58,471 INFO L129 PetriNetUnfolder]: 13819/27786 cut-off events. [2022-07-19 21:48:58,472 INFO L130 PetriNetUnfolder]: For 320138/320568 co-relation queries the response was YES. [2022-07-19 21:48:58,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138206 conditions, 27786 events. 13819/27786 cut-off events. For 320138/320568 co-relation queries the response was YES. Maximal size of possible extension queue 1345. Compared 259874 event pairs, 117 based on Foata normal form. 304/28067 useless extension candidates. Maximal degree in co-relation 138163. Up to 8282 conditions per place. [2022-07-19 21:48:59,104 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 453 selfloop transitions, 1615 changer transitions 0/2203 dead transitions. [2022-07-19 21:48:59,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 2203 transitions, 27206 flow [2022-07-19 21:48:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-19 21:48:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-19 21:48:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3140 transitions. [2022-07-19 21:48:59,109 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809802645846887 [2022-07-19 21:48:59,110 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3140 transitions. [2022-07-19 21:48:59,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3140 transitions. [2022-07-19 21:48:59,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:59,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3140 transitions. [2022-07-19 21:48:59,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 59.24528301886792) internal successors, (3140), 53 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:59,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:59,120 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:59,121 INFO L186 Difference]: Start difference. First operand has 286 places, 1129 transitions, 11002 flow. Second operand 53 states and 3140 transitions. [2022-07-19 21:48:59,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 2203 transitions, 27206 flow [2022-07-19 21:49:01,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2203 transitions, 26708 flow, removed 182 selfloop flow, removed 15 redundant places. [2022-07-19 21:49:01,807 INFO L242 Difference]: Finished difference. Result has 328 places, 2016 transitions, 24087 flow [2022-07-19 21:49:01,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=10668, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=24087, PETRI_PLACES=328, PETRI_TRANSITIONS=2016} [2022-07-19 21:49:01,808 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 254 predicate places. [2022-07-19 21:49:01,808 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 2016 transitions, 24087 flow [2022-07-19 21:49:01,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.26086956521739) internal successors, (1317), 23 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:49:01,809 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:49:01,809 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:49:01,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:49:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 21:49:02,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:49:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:49:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 933906732, now seen corresponding path program 1 times [2022-07-19 21:49:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:49:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229363683] [2022-07-19 21:49:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:49:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:49:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:49:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 21:49:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:49:02,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229363683] [2022-07-19 21:49:02,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229363683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:49:02,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:49:02,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:49:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274870522] [2022-07-19 21:49:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:49:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:49:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:49:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:49:02,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:49:02,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 87 [2022-07-19 21:49:02,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 2016 transitions, 24087 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:49:02,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:49:02,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 87 [2022-07-19 21:49:02,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:49:10,610 INFO L129 PetriNetUnfolder]: 20253/41766 cut-off events. [2022-07-19 21:49:10,610 INFO L130 PetriNetUnfolder]: For 449219/449700 co-relation queries the response was YES. [2022-07-19 21:49:11,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195728 conditions, 41766 events. 20253/41766 cut-off events. For 449219/449700 co-relation queries the response was YES. Maximal size of possible extension queue 2157. Compared 434324 event pairs, 146 based on Foata normal form. 469/42161 useless extension candidates. Maximal degree in co-relation 195681. Up to 10349 conditions per place. [2022-07-19 21:49:11,073 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 0 selfloop transitions, 0 changer transitions 3079/3079 dead transitions. [2022-07-19 21:49:11,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 3079 transitions, 44657 flow [2022-07-19 21:49:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:49:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:49:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1052 transitions. [2022-07-19 21:49:11,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.711291413116971 [2022-07-19 21:49:11,090 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1052 transitions. [2022-07-19 21:49:11,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1052 transitions. [2022-07-19 21:49:11,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:49:11,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1052 transitions. [2022-07-19 21:49:11,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:49:11,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:49:11,095 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:49:11,095 INFO L186 Difference]: Start difference. First operand has 328 places, 2016 transitions, 24087 flow. Second operand 17 states and 1052 transitions. [2022-07-19 21:49:11,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 3079 transitions, 44657 flow [2022-07-19 21:49:19,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 3079 transitions, 43734 flow, removed 270 selfloop flow, removed 21 redundant places. [2022-07-19 21:49:19,288 INFO L242 Difference]: Finished difference. Result has 321 places, 0 transitions, 0 flow [2022-07-19 21:49:19,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23326, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=321, PETRI_TRANSITIONS=0} [2022-07-19 21:49:19,289 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-07-19 21:49:19,290 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 0 transitions, 0 flow [2022-07-19 21:49:19,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:49:19,290 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-19 21:49:19,290 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-07-19 21:49:19,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 21:49:19,290 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:49:19,292 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2022-07-19 21:49:19,292 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:49:19,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:49:19 BasicIcfg [2022-07-19 21:49:19,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:49:19,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:49:19,298 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:49:19,298 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:49:19,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:33" (3/4) ... [2022-07-19 21:49:19,300 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 21:49:19,304 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread [2022-07-19 21:49:19,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-07-19 21:49:19,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-19 21:49:19,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 21:49:19,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 21:49:19,329 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:49:19,329 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:49:19,329 INFO L158 Benchmark]: Toolchain (without parser) took 47081.44ms. Allocated memory was 104.9MB in the beginning and 9.0GB in the end (delta: 8.9GB). Free memory was 71.4MB in the beginning and 7.4GB in the end (delta: -7.4GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2022-07-19 21:49:19,330 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:49:19,330 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.60ms. Allocated memory was 104.9MB in the beginning and 148.9MB in the end (delta: 44.0MB). Free memory was 71.4MB in the beginning and 113.5MB in the end (delta: -42.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-19 21:49:19,330 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.01ms. Allocated memory is still 148.9MB. Free memory was 113.5MB in the beginning and 111.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:49:19,330 INFO L158 Benchmark]: Boogie Preprocessor took 41.85ms. Allocated memory is still 148.9MB. Free memory was 111.5MB in the beginning and 110.6MB in the end (delta: 852.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:49:19,330 INFO L158 Benchmark]: RCFGBuilder took 375.44ms. Allocated memory is still 148.9MB. Free memory was 110.0MB in the beginning and 99.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 21:49:19,331 INFO L158 Benchmark]: TraceAbstraction took 46274.28ms. Allocated memory was 148.9MB in the beginning and 9.0GB in the end (delta: 8.8GB). Free memory was 98.9MB in the beginning and 7.4GB in the end (delta: -7.3GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2022-07-19 21:49:19,331 INFO L158 Benchmark]: Witness Printer took 31.26ms. Allocated memory is still 9.0GB. Free memory was 7.4GB in the beginning and 7.4GB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:49:19,332 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 300.60ms. Allocated memory was 104.9MB in the beginning and 148.9MB in the end (delta: 44.0MB). Free memory was 71.4MB in the beginning and 113.5MB in the end (delta: -42.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.01ms. Allocated memory is still 148.9MB. Free memory was 113.5MB in the beginning and 111.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.85ms. Allocated memory is still 148.9MB. Free memory was 111.5MB in the beginning and 110.6MB in the end (delta: 852.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 375.44ms. Allocated memory is still 148.9MB. Free memory was 110.0MB in the beginning and 99.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 46274.28ms. Allocated memory was 148.9MB in the beginning and 9.0GB in the end (delta: 8.8GB). Free memory was 98.9MB in the beginning and 7.4GB in the end (delta: -7.3GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. * Witness Printer took 31.26ms. Allocated memory is still 9.0GB. Free memory was 7.4GB in the beginning and 7.4GB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 727]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 62 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 8 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=3, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 106 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 68 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.6s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56 IncrementalHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 12 mSDtfsCounter, 56 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 279 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 74 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 70 IncrementalHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 14 mSDtfsCounter, 70 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=3, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 257 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 80 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.5s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1028 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1028 mSDsluCounter, 602 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 507 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 785 IncrementalHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 98 mSDtfsCounter, 785 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2572 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6892occurred in iteration=6, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 529 NumberOfCodeBlocks, 529 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 1516 SizeOfPredicates, 26 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 67/301 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 86 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.5s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 35.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2212 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2212 mSDsluCounter, 1285 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1094 mSDsCounter, 282 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1664 IncrementalHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 282 mSolverCounterUnsat, 195 mSDtfsCounter, 1664 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1027 GetRequests, 684 SyntacticMatches, 2 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7485 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24087occurred in iteration=9, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 945 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1244 ConstructedInterpolants, 0 QuantifiedInterpolants, 3228 SizeOfPredicates, 48 NumberOfNonLiveVariables, 941 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 500/1403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-19 21:49:19,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE