./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/floating_read-15.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/floating_read-15.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 abe6fcc2bea9781e0ab07417eb8616a5b638529e720de8eddec3568cb8edc6ea --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:20:52,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:20:52,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:20:52,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:20:52,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:20:52,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:20:52,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:20:52,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:20:52,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:20:52,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:20:52,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:20:52,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:20:52,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:20:52,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:20:52,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:20:52,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:20:52,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:20:52,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:20:52,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:20:52,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:20:52,417 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:20:52,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:20:52,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:20:52,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:20:52,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:20:52,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:20:52,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:20:52,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:20:52,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:20:52,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:20:52,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:20:52,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:20:52,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:20:52,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:20:52,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:20:52,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:20:52,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:20:52,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:20:52,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:20:52,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:20:52,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:20:52,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:20:52,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:20:52,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:20:52,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:20:52,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:20:52,471 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:20:52,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:20:52,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:20:52,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:20:52,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:20:52,473 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:20:52,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:20:52,474 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:20:52,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:20:52,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:20:52,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:20:52,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:20:52,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:20:52,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:20:52,476 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:20:52,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:20:52,476 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:20:52,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:20:52,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:20:52,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:20:52,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:20:52,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:20:52,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:20:52,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:20:52,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:20:52,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:20:52,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:20:52,479 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:20:52,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:20:52,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:20:52,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abe6fcc2bea9781e0ab07417eb8616a5b638529e720de8eddec3568cb8edc6ea [2022-07-21 09:20:52,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:20:52,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:20:52,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:20:52,851 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:20:52,855 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:20:52,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/floating_read-15.i [2022-07-21 09:20:52,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b3f11326/fe2a9f7d8058458cb5dcbee8a6d5edfd/FLAGad940b274 [2022-07-21 09:20:53,506 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:20:53,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-15.i [2022-07-21 09:20:53,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b3f11326/fe2a9f7d8058458cb5dcbee8a6d5edfd/FLAGad940b274 [2022-07-21 09:20:53,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b3f11326/fe2a9f7d8058458cb5dcbee8a6d5edfd [2022-07-21 09:20:53,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:20:53,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:20:53,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:20:53,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:20:53,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:20:53,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:20:53" (1/1) ... [2022-07-21 09:20:53,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0d6112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:53, skipping insertion in model container [2022-07-21 09:20:53,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:20:53" (1/1) ... [2022-07-21 09:20:53,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:20:53,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:20:54,195 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-21 09:20:54,207 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-15.i[31197,31210] [2022-07-21 09:20:54,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:20:54,222 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:20:54,261 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-21 09:20:54,271 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-15.i[31197,31210] [2022-07-21 09:20:54,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:20:54,306 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:20:54,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54 WrapperNode [2022-07-21 09:20:54,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:20:54,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:20:54,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:20:54,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:20:54,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,342 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-21 09:20:54,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:20:54,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:20:54,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:20:54,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:20:54,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:20:54,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:20:54,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:20:54,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:20:54,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (1/1) ... [2022-07-21 09:20:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:20:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:54,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:20:54,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:20:54,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:20:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:20:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:20:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:20:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:20:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:20:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:20:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-07-21 09:20:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-07-21 09:20:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:20:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:20:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:20:54,469 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:20:54,578 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:20:54,580 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:20:54,765 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:20:54,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:20:54,772 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:20:54,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:20:54 BoogieIcfgContainer [2022-07-21 09:20:54,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:20:54,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:20:54,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:20:54,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:20:54,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:20:53" (1/3) ... [2022-07-21 09:20:54,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28118f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:20:54, skipping insertion in model container [2022-07-21 09:20:54,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:20:54" (2/3) ... [2022-07-21 09:20:54,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28118f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:20:54, skipping insertion in model container [2022-07-21 09:20:54,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:20:54" (3/3) ... [2022-07-21 09:20:54,792 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-15.i [2022-07-21 09:20:54,797 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:20:54,805 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:20:54,806 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:20:54,806 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:20:54,876 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 09:20:54,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2022-07-21 09:20:54,982 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2022-07-21 09:20:54,983 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 09:20:54,986 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. [2022-07-21 09:20:54,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2022-07-21 09:20:54,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2022-07-21 09:20:55,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:20:55,017 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@35b4ee25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177417fc [2022-07-21 09:20:55,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 09:20:55,028 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-21 09:20:55,028 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:20:55,029 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,029 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] [2022-07-21 09:20:55,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2022-07-21 09:20:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897569112] [2022-07-21 09:20:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:55,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897569112] [2022-07-21 09:20:55,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897569112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:55,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:55,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:20:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781294368] [2022-07-21 09:20:55,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:55,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:20:55,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:20:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:20:55,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2022-07-21 09:20:55,295 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) [2022-07-21 09:20:55,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:55,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2022-07-21 09:20:55,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:55,322 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2022-07-21 09:20:55,323 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 09:20:55,323 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. [2022-07-21 09:20:55,324 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2022-07-21 09:20:55,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 85 flow [2022-07-21 09:20:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:20:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:20:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2022-07-21 09:20:55,338 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2022-07-21 09:20:55,339 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2022-07-21 09:20:55,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2022-07-21 09:20:55,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:55,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2022-07-21 09:20:55,346 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) [2022-07-21 09:20:55,355 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) [2022-07-21 09:20:55,356 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) [2022-07-21 09:20:55,358 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 85 flow. Second operand 2 states and 108 transitions. [2022-07-21 09:20:55,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 85 flow [2022-07-21 09:20:55,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:20:55,366 INFO L242 Difference]: Finished difference. Result has 43 places, 39 transitions, 83 flow [2022-07-21 09:20:55,369 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} [2022-07-21 09:20:55,373 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-07-21 09:20:55,373 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 83 flow [2022-07-21 09:20:55,374 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) [2022-07-21 09:20:55,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,374 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] [2022-07-21 09:20:55,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:20:55,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2022-07-21 09:20:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651217892] [2022-07-21 09:20:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:55,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:55,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651217892] [2022-07-21 09:20:55,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651217892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:55,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:55,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:55,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709064692] [2022-07-21 09:20:55,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:55,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:55,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:55,464 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2022-07-21 09:20:55,464 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) [2022-07-21 09:20:55,464 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:55,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2022-07-21 09:20:55,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:55,502 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-21 09:20:55,505 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:20:55,506 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. [2022-07-21 09:20:55,507 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 8 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-07-21 09:20:55,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 107 flow [2022-07-21 09:20:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2022-07-21 09:20:55,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2022-07-21 09:20:55,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2022-07-21 09:20:55,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2022-07-21 09:20:55,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:55,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2022-07-21 09:20:55,513 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) [2022-07-21 09:20:55,516 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) [2022-07-21 09:20:55,517 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) [2022-07-21 09:20:55,517 INFO L186 Difference]: Start difference. First operand has 43 places, 39 transitions, 83 flow. Second operand 3 states and 149 transitions. [2022-07-21 09:20:55,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 107 flow [2022-07-21 09:20:55,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:20:55,519 INFO L242 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2022-07-21 09:20:55,520 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} [2022-07-21 09:20:55,521 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-07-21 09:20:55,521 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2022-07-21 09:20:55,521 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) [2022-07-21 09:20:55,521 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,522 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] [2022-07-21 09:20:55,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:20:55,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2022-07-21 09:20:55,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059876531] [2022-07-21 09:20:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:20:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059876531] [2022-07-21 09:20:55,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059876531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:55,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:55,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707184970] [2022-07-21 09:20:55,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:55,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:55,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2022-07-21 09:20:55,603 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) [2022-07-21 09:20:55,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:55,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2022-07-21 09:20:55,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:55,619 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-21 09:20:55,619 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:20:55,619 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. [2022-07-21 09:20:55,620 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-07-21 09:20:55,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 101 flow [2022-07-21 09:20:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:55,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2022-07-21 09:20:55,622 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2022-07-21 09:20:55,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2022-07-21 09:20:55,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2022-07-21 09:20:55,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:55,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2022-07-21 09:20:55,624 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) [2022-07-21 09:20:55,625 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) [2022-07-21 09:20:55,625 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) [2022-07-21 09:20:55,625 INFO L186 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 150 transitions. [2022-07-21 09:20:55,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 101 flow [2022-07-21 09:20:55,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:20:55,627 INFO L242 Difference]: Finished difference. Result has 47 places, 39 transitions, 95 flow [2022-07-21 09:20:55,627 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} [2022-07-21 09:20:55,628 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-07-21 09:20:55,629 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 95 flow [2022-07-21 09:20:55,629 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) [2022-07-21 09:20:55,629 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,629 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] [2022-07-21 09:20:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:20:55,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2022-07-21 09:20:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025871079] [2022-07-21 09:20:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:20:55,679 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:20:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:20:55,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:20:55,737 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:20:55,738 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 09:20:55,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 09:20:55,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:20:55,740 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 09:20:55,745 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:20:55,745 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 09:20:55,762 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:20:55,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2022-07-21 09:20:55,782 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2022-07-21 09:20:55,782 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 09:20:55,783 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. [2022-07-21 09:20:55,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2022-07-21 09:20:55,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2022-07-21 09:20:55,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:20:55,786 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@35b4ee25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177417fc [2022-07-21 09:20:55,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 09:20:55,790 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-21 09:20:55,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:20:55,791 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,791 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] [2022-07-21 09:20:55,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash 775345522, now seen corresponding path program 1 times [2022-07-21 09:20:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642005835] [2022-07-21 09:20:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:55,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:55,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642005835] [2022-07-21 09:20:55,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642005835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:55,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:55,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:20:55,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604205448] [2022-07-21 09:20:55,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:55,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:20:55,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:55,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:20:55,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:20:55,829 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 66 [2022-07-21 09:20:55,830 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) [2022-07-21 09:20:55,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:55,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 66 [2022-07-21 09:20:55,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:55,844 INFO L129 PetriNetUnfolder]: 0/64 cut-off events. [2022-07-21 09:20:55,846 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 09:20:55,846 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. [2022-07-21 09:20:55,847 INFO L132 encePairwiseOnDemand]: 65/66 looper letters, 2 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2022-07-21 09:20:55,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 106 flow [2022-07-21 09:20:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:20:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:20:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 119 transitions. [2022-07-21 09:20:55,851 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9015151515151515 [2022-07-21 09:20:55,851 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 119 transitions. [2022-07-21 09:20:55,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 119 transitions. [2022-07-21 09:20:55,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:55,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 119 transitions. [2022-07-21 09:20:55,853 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) [2022-07-21 09:20:55,854 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) [2022-07-21 09:20:55,854 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) [2022-07-21 09:20:55,854 INFO L186 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 2 states and 119 transitions. [2022-07-21 09:20:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 106 flow [2022-07-21 09:20:55,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 104 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 09:20:55,857 INFO L242 Difference]: Finished difference. Result has 51 places, 45 transitions, 100 flow [2022-07-21 09:20:55,857 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} [2022-07-21 09:20:55,859 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-07-21 09:20:55,859 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 100 flow [2022-07-21 09:20:55,859 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) [2022-07-21 09:20:55,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,860 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] [2022-07-21 09:20:55,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:20:55,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,861 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2022-07-21 09:20:55,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141604344] [2022-07-21 09:20:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:55,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141604344] [2022-07-21 09:20:55,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141604344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:55,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:55,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208268057] [2022-07-21 09:20:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:55,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:55,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:55,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2022-07-21 09:20:55,922 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) [2022-07-21 09:20:55,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:55,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2022-07-21 09:20:55,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:55,945 INFO L129 PetriNetUnfolder]: 0/61 cut-off events. [2022-07-21 09:20:55,945 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 09:20:55,945 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. [2022-07-21 09:20:55,946 INFO L132 encePairwiseOnDemand]: 63/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2022-07-21 09:20:55,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 134 flow [2022-07-21 09:20:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-21 09:20:55,947 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-21 09:20:55,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-21 09:20:55,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-21 09:20:55,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:55,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-21 09:20:55,949 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) [2022-07-21 09:20:55,949 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) [2022-07-21 09:20:55,950 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) [2022-07-21 09:20:55,950 INFO L186 Difference]: Start difference. First operand has 51 places, 45 transitions, 100 flow. Second operand 3 states and 167 transitions. [2022-07-21 09:20:55,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 134 flow [2022-07-21 09:20:55,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:20:55,952 INFO L242 Difference]: Finished difference. Result has 54 places, 46 transitions, 112 flow [2022-07-21 09:20:55,952 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} [2022-07-21 09:20:55,953 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2022-07-21 09:20:55,953 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 112 flow [2022-07-21 09:20:55,954 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) [2022-07-21 09:20:55,954 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,954 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:20:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:20:55,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2022-07-21 09:20:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833881337] [2022-07-21 09:20:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:20:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833881337] [2022-07-21 09:20:56,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833881337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:56,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:56,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972997144] [2022-07-21 09:20:56,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:56,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:56,012 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2022-07-21 09:20:56,013 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) [2022-07-21 09:20:56,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:56,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2022-07-21 09:20:56,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:56,048 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-21 09:20:56,049 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 09:20:56,050 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. [2022-07-21 09:20:56,050 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-07-21 09:20:56,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 143 flow [2022-07-21 09:20:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-21 09:20:56,053 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-21 09:20:56,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-21 09:20:56,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-21 09:20:56,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:56,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-21 09:20:56,054 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) [2022-07-21 09:20:56,056 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) [2022-07-21 09:20:56,062 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) [2022-07-21 09:20:56,062 INFO L186 Difference]: Start difference. First operand has 54 places, 46 transitions, 112 flow. Second operand 3 states and 167 transitions. [2022-07-21 09:20:56,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 143 flow [2022-07-21 09:20:56,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:20:56,064 INFO L242 Difference]: Finished difference. Result has 56 places, 48 transitions, 129 flow [2022-07-21 09:20:56,064 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} [2022-07-21 09:20:56,065 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2022-07-21 09:20:56,065 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 129 flow [2022-07-21 09:20:56,065 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) [2022-07-21 09:20:56,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:56,066 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] [2022-07-21 09:20:56,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:20:56,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2022-07-21 09:20:56,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053058629] [2022-07-21 09:20:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:56,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:56,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:56,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053058629] [2022-07-21 09:20:56,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053058629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:56,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202988843] [2022-07-21 09:20:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:56,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:56,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:56,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:20:56,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:20:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:56,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:20:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:56,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:56,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202988843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:56,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:56,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:20:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16371371] [2022-07-21 09:20:56,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:56,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:20:56,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:20:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:20:56,306 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2022-07-21 09:20:56,307 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) [2022-07-21 09:20:56,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:56,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2022-07-21 09:20:56,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:56,372 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2022-07-21 09:20:56,373 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:20:56,373 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. [2022-07-21 09:20:56,373 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 9 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-07-21 09:20:56,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 163 flow [2022-07-21 09:20:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:20:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:20:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2022-07-21 09:20:56,376 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-07-21 09:20:56,376 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2022-07-21 09:20:56,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2022-07-21 09:20:56,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:56,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2022-07-21 09:20:56,378 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) [2022-07-21 09:20:56,379 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) [2022-07-21 09:20:56,379 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) [2022-07-21 09:20:56,380 INFO L186 Difference]: Start difference. First operand has 56 places, 48 transitions, 129 flow. Second operand 9 states and 468 transitions. [2022-07-21 09:20:56,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 163 flow [2022-07-21 09:20:56,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:20:56,382 INFO L242 Difference]: Finished difference. Result has 60 places, 47 transitions, 134 flow [2022-07-21 09:20:56,382 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} [2022-07-21 09:20:56,383 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2022-07-21 09:20:56,383 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 134 flow [2022-07-21 09:20:56,384 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) [2022-07-21 09:20:56,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:56,384 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] [2022-07-21 09:20:56,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:20:56,609 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 [2022-07-21 09:20:56,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:56,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2022-07-21 09:20:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:56,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872338525] [2022-07-21 09:20:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:20:56,626 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:20:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:20:56,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:20:56,642 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:20:56,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 09:20:56,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 09:20:56,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:20:56,643 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 09:20:56,644 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:20:56,644 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 09:20:56,659 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:20:56,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2022-07-21 09:20:56,677 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2022-07-21 09:20:56,678 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 09:20:56,679 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. [2022-07-21 09:20:56,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2022-07-21 09:20:56,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 52 transitions, 125 flow [2022-07-21 09:20:56,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:20:56,681 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@35b4ee25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177417fc [2022-07-21 09:20:56,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 09:20:56,686 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-21 09:20:56,686 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:20:56,686 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:56,686 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] [2022-07-21 09:20:56,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2022-07-21 09:20:56,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:56,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801370390] [2022-07-21 09:20:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:56,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:56,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801370390] [2022-07-21 09:20:56,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801370390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:56,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:56,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466664256] [2022-07-21 09:20:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:56,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:56,719 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-21 09:20:56,719 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) [2022-07-21 09:20:56,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:56,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-21 09:20:56,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:56,744 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2022-07-21 09:20:56,745 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 09:20:56,745 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. [2022-07-21 09:20:56,745 INFO L132 encePairwiseOnDemand]: 69/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-07-21 09:20:56,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 159 flow [2022-07-21 09:20:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2022-07-21 09:20:56,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8447488584474886 [2022-07-21 09:20:56,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2022-07-21 09:20:56,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2022-07-21 09:20:56,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:56,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2022-07-21 09:20:56,748 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) [2022-07-21 09:20:56,749 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) [2022-07-21 09:20:56,749 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) [2022-07-21 09:20:56,749 INFO L186 Difference]: Start difference. First operand has 58 places, 52 transitions, 125 flow. Second operand 3 states and 185 transitions. [2022-07-21 09:20:56,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 159 flow [2022-07-21 09:20:56,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 153 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 09:20:56,752 INFO L242 Difference]: Finished difference. Result has 61 places, 52 transitions, 129 flow [2022-07-21 09:20:56,752 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} [2022-07-21 09:20:56,755 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-07-21 09:20:56,756 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 129 flow [2022-07-21 09:20:56,756 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) [2022-07-21 09:20:56,757 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:56,757 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] [2022-07-21 09:20:56,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:20:56,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2022-07-21 09:20:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:56,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989632722] [2022-07-21 09:20:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:20:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989632722] [2022-07-21 09:20:56,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989632722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:56,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:56,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:56,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43439222] [2022-07-21 09:20:56,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:56,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:56,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:56,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-21 09:20:56,804 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) [2022-07-21 09:20:56,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:56,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-21 09:20:56,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:56,838 INFO L129 PetriNetUnfolder]: 21/145 cut-off events. [2022-07-21 09:20:56,839 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-21 09:20:56,840 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. [2022-07-21 09:20:56,841 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2022-07-21 09:20:56,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 177 flow [2022-07-21 09:20:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-07-21 09:20:56,842 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2022-07-21 09:20:56,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-07-21 09:20:56,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-07-21 09:20:56,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:56,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-07-21 09:20:56,843 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) [2022-07-21 09:20:56,844 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) [2022-07-21 09:20:56,845 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) [2022-07-21 09:20:56,845 INFO L186 Difference]: Start difference. First operand has 61 places, 52 transitions, 129 flow. Second operand 3 states and 183 transitions. [2022-07-21 09:20:56,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 177 flow [2022-07-21 09:20:56,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:20:56,848 INFO L242 Difference]: Finished difference. Result has 63 places, 55 transitions, 153 flow [2022-07-21 09:20:56,849 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} [2022-07-21 09:20:56,849 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2022-07-21 09:20:56,850 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 153 flow [2022-07-21 09:20:56,850 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) [2022-07-21 09:20:56,850 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:56,850 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] [2022-07-21 09:20:56,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:20:56,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:56,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2022-07-21 09:20:56,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:56,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514209413] [2022-07-21 09:20:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:56,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:56,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:56,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514209413] [2022-07-21 09:20:56,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514209413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:56,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915505729] [2022-07-21 09:20:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:56,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:56,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:56,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:20:56,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:20:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:56,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:20:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:57,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:57,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915505729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:57,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:57,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:20:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782681303] [2022-07-21 09:20:57,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:57,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:20:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:20:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:20:57,050 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2022-07-21 09:20:57,051 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) [2022-07-21 09:20:57,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:57,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2022-07-21 09:20:57,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:57,127 INFO L129 PetriNetUnfolder]: 14/115 cut-off events. [2022-07-21 09:20:57,127 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:20:57,129 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. [2022-07-21 09:20:57,130 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2022-07-21 09:20:57,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 219 flow [2022-07-21 09:20:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:20:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:20:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2022-07-21 09:20:57,133 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2022-07-21 09:20:57,133 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2022-07-21 09:20:57,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2022-07-21 09:20:57,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:57,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2022-07-21 09:20:57,135 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) [2022-07-21 09:20:57,136 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) [2022-07-21 09:20:57,137 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) [2022-07-21 09:20:57,137 INFO L186 Difference]: Start difference. First operand has 63 places, 55 transitions, 153 flow. Second operand 9 states and 519 transitions. [2022-07-21 09:20:57,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 219 flow [2022-07-21 09:20:57,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:20:57,143 INFO L242 Difference]: Finished difference. Result has 73 places, 61 transitions, 199 flow [2022-07-21 09:20:57,143 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} [2022-07-21 09:20:57,145 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 15 predicate places. [2022-07-21 09:20:57,145 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 199 flow [2022-07-21 09:20:57,145 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) [2022-07-21 09:20:57,145 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:57,146 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] [2022-07-21 09:20:57,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:20:57,355 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 [2022-07-21 09:20:57,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2022-07-21 09:20:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691737765] [2022-07-21 09:20:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:20:57,386 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:20:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:20:57,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:20:57,404 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:20:57,405 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 09:20:57,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 09:20:57,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 09:20:57,405 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 09:20:57,406 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:20:57,406 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 09:20:57,424 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 09:20:57,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2022-07-21 09:20:57,472 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2022-07-21 09:20:57,472 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 09:20:57,473 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. [2022-07-21 09:20:57,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2022-07-21 09:20:57,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 148 flow [2022-07-21 09:20:57,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:20:57,479 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@35b4ee25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177417fc [2022-07-21 09:20:57,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 09:20:57,481 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-21 09:20:57,481 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:20:57,481 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:57,482 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] [2022-07-21 09:20:57,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2022-07-21 09:20:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:57,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076251173] [2022-07-21 09:20:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:57,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:57,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:57,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076251173] [2022-07-21 09:20:57,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076251173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:57,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:57,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:57,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829687641] [2022-07-21 09:20:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:57,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:57,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:57,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:57,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:57,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2022-07-21 09:20:57,510 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) [2022-07-21 09:20:57,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:57,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2022-07-21 09:20:57,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:57,538 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2022-07-21 09:20:57,538 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 09:20:57,539 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. [2022-07-21 09:20:57,539 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-07-21 09:20:57,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 184 flow [2022-07-21 09:20:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2022-07-21 09:20:57,541 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8375 [2022-07-21 09:20:57,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2022-07-21 09:20:57,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2022-07-21 09:20:57,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:57,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2022-07-21 09:20:57,542 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) [2022-07-21 09:20:57,543 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) [2022-07-21 09:20:57,543 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) [2022-07-21 09:20:57,543 INFO L186 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 3 states and 201 transitions. [2022-07-21 09:20:57,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 184 flow [2022-07-21 09:20:57,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 172 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 09:20:57,547 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 146 flow [2022-07-21 09:20:57,547 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} [2022-07-21 09:20:57,548 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2022-07-21 09:20:57,548 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 146 flow [2022-07-21 09:20:57,548 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) [2022-07-21 09:20:57,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:57,549 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] [2022-07-21 09:20:57,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:20:57,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2022-07-21 09:20:57,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:57,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021098241] [2022-07-21 09:20:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:57,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:20:57,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:57,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021098241] [2022-07-21 09:20:57,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021098241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:57,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:57,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:20:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460012736] [2022-07-21 09:20:57,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:57,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:20:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:20:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:20:57,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-21 09:20:57,572 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) [2022-07-21 09:20:57,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:57,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-21 09:20:57,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:57,622 INFO L129 PetriNetUnfolder]: 73/359 cut-off events. [2022-07-21 09:20:57,623 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-07-21 09:20:57,625 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. [2022-07-21 09:20:57,626 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2022-07-21 09:20:57,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 211 flow [2022-07-21 09:20:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:20:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:20:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2022-07-21 09:20:57,628 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2022-07-21 09:20:57,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2022-07-21 09:20:57,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2022-07-21 09:20:57,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:57,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2022-07-21 09:20:57,629 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) [2022-07-21 09:20:57,630 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) [2022-07-21 09:20:57,630 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) [2022-07-21 09:20:57,630 INFO L186 Difference]: Start difference. First operand has 69 places, 58 transitions, 146 flow. Second operand 3 states and 199 transitions. [2022-07-21 09:20:57,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 211 flow [2022-07-21 09:20:57,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:20:57,632 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 177 flow [2022-07-21 09:20:57,632 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} [2022-07-21 09:20:57,633 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2022-07-21 09:20:57,633 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 177 flow [2022-07-21 09:20:57,633 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) [2022-07-21 09:20:57,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:57,634 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] [2022-07-21 09:20:57,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:20:57,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2022-07-21 09:20:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:57,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97661614] [2022-07-21 09:20:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:57,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:57,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97661614] [2022-07-21 09:20:57,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97661614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254784412] [2022-07-21 09:20:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:57,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:57,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:20:57,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:20:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:57,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:20:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:57,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:57,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254784412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:57,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:57,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:20:57,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835043068] [2022-07-21 09:20:57,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:57,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:20:57,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:20:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:20:57,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-21 09:20:57,811 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) [2022-07-21 09:20:57,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:57,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-21 09:20:57,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:57,897 INFO L129 PetriNetUnfolder]: 54/233 cut-off events. [2022-07-21 09:20:57,897 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 09:20:57,899 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. [2022-07-21 09:20:57,900 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2022-07-21 09:20:57,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 245 flow [2022-07-21 09:20:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:20:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:20:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2022-07-21 09:20:57,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2022-07-21 09:20:57,902 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2022-07-21 09:20:57,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2022-07-21 09:20:57,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:57,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2022-07-21 09:20:57,904 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) [2022-07-21 09:20:57,906 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) [2022-07-21 09:20:57,906 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) [2022-07-21 09:20:57,906 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 177 flow. Second operand 9 states and 565 transitions. [2022-07-21 09:20:57,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 245 flow [2022-07-21 09:20:57,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:20:57,909 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 222 flow [2022-07-21 09:20:57,909 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} [2022-07-21 09:20:57,910 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2022-07-21 09:20:57,910 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 222 flow [2022-07-21 09:20:57,910 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) [2022-07-21 09:20:57,910 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:57,911 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] [2022-07-21 09:20:57,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:20:58,123 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 [2022-07-21 09:20:58,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2022-07-21 09:20:58,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:58,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418511708] [2022-07-21 09:20:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:58,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:20:58,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418511708] [2022-07-21 09:20:58,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418511708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:58,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472716625] [2022-07-21 09:20:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:58,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:58,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:58,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:20:58,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:20:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:58,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:20:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:20:58,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:20:58,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472716625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:58,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:58,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-21 09:20:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520731347] [2022-07-21 09:20:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:58,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:20:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:20:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:20:58,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-21 09:20:58,476 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) [2022-07-21 09:20:58,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:58,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-21 09:20:58,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:58,985 INFO L129 PetriNetUnfolder]: 768/1923 cut-off events. [2022-07-21 09:20:58,985 INFO L130 PetriNetUnfolder]: For 1173/1181 co-relation queries the response was YES. [2022-07-21 09:20:58,994 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. [2022-07-21 09:20:59,022 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2022-07-21 09:20:59,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 999 flow [2022-07-21 09:20:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 09:20:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-21 09:20:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2022-07-21 09:20:59,026 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2022-07-21 09:20:59,026 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2022-07-21 09:20:59,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2022-07-21 09:20:59,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:59,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2022-07-21 09:20:59,029 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) [2022-07-21 09:20:59,032 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) [2022-07-21 09:20:59,032 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) [2022-07-21 09:20:59,032 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 222 flow. Second operand 19 states and 1082 transitions. [2022-07-21 09:20:59,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 999 flow [2022-07-21 09:20:59,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 971 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-21 09:20:59,039 INFO L242 Difference]: Finished difference. Result has 100 places, 121 transitions, 607 flow [2022-07-21 09:20:59,039 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} [2022-07-21 09:20:59,040 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2022-07-21 09:20:59,040 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 607 flow [2022-07-21 09:20:59,041 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) [2022-07-21 09:20:59,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:59,041 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] [2022-07-21 09:20:59,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:20:59,266 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 [2022-07-21 09:20:59,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1611844105, now seen corresponding path program 1 times [2022-07-21 09:20:59,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:59,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306629935] [2022-07-21 09:20:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:59,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:59,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:59,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306629935] [2022-07-21 09:20:59,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306629935] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:59,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654862142] [2022-07-21 09:20:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:59,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:59,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:59,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:20:59,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:20:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:59,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:20:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:59,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:59,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654862142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:59,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:59,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 09:20:59,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292353657] [2022-07-21 09:20:59,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:59,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:59,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:59,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:59,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:59,663 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-21 09:20:59,664 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) [2022-07-21 09:20:59,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:59,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-21 09:20:59,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:00,817 INFO L129 PetriNetUnfolder]: 1764/4221 cut-off events. [2022-07-21 09:21:00,818 INFO L130 PetriNetUnfolder]: For 4672/4682 co-relation queries the response was YES. [2022-07-21 09:21:00,836 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. [2022-07-21 09:21:00,865 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/337 dead transitions. [2022-07-21 09:21:00,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 337 transitions, 2519 flow [2022-07-21 09:21:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:21:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-21 09:21:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2022-07-21 09:21:00,871 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2022-07-21 09:21:00,871 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2022-07-21 09:21:00,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2022-07-21 09:21:00,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:00,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2022-07-21 09:21:00,878 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) [2022-07-21 09:21:00,883 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) [2022-07-21 09:21:00,884 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) [2022-07-21 09:21:00,885 INFO L186 Difference]: Start difference. First operand has 100 places, 121 transitions, 607 flow. Second operand 41 states and 2224 transitions. [2022-07-21 09:21:00,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 337 transitions, 2519 flow [2022-07-21 09:21:00,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2497 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-21 09:21:00,909 INFO L242 Difference]: Finished difference. Result has 140 places, 255 transitions, 1863 flow [2022-07-21 09:21:00,909 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} [2022-07-21 09:21:00,910 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2022-07-21 09:21:00,910 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 255 transitions, 1863 flow [2022-07-21 09:21:00,910 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) [2022-07-21 09:21:00,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:00,911 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] [2022-07-21 09:21:00,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:01,132 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 [2022-07-21 09:21:01,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2022-07-21 09:21:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810311550] [2022-07-21 09:21:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:01,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810311550] [2022-07-21 09:21:01,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810311550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957132328] [2022-07-21 09:21:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:01,222 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:01,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:21:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:21:01,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:01,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:01,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957132328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:01,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:01,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-07-21 09:21:01,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844411458] [2022-07-21 09:21:01,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:01,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:21:01,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:21:01,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:21:01,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-21 09:21:01,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 255 transitions, 1863 flow. Second operand has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:01,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:01,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-21 09:21:01,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:03,313 INFO L129 PetriNetUnfolder]: 2712/6242 cut-off events. [2022-07-21 09:21:03,313 INFO L130 PetriNetUnfolder]: For 14537/14639 co-relation queries the response was YES. [2022-07-21 09:21:03,351 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 51021 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. [2022-07-21 09:21:03,396 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 380 selfloop transitions, 600 changer transitions 0/1041 dead transitions. [2022-07-21 09:21:03,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1041 transitions, 10637 flow [2022-07-21 09:21:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 09:21:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-21 09:21:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2022-07-21 09:21:03,403 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2022-07-21 09:21:03,403 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2022-07-21 09:21:03,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2022-07-21 09:21:03,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:03,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2022-07-21 09:21:03,415 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) [2022-07-21 09:21:03,423 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) [2022-07-21 09:21:03,425 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) [2022-07-21 09:21:03,425 INFO L186 Difference]: Start difference. First operand has 140 places, 255 transitions, 1863 flow. Second operand 59 states and 3228 transitions. [2022-07-21 09:21:03,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1041 transitions, 10637 flow [2022-07-21 09:21:03,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1041 transitions, 10210 flow, removed 15 selfloop flow, removed 15 redundant places. [2022-07-21 09:21:03,547 INFO L242 Difference]: Finished difference. Result has 187 places, 737 transitions, 6892 flow [2022-07-21 09:21:03,548 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} [2022-07-21 09:21:03,549 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2022-07-21 09:21:03,549 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 737 transitions, 6892 flow [2022-07-21 09:21:03,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:03,549 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:03,550 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] [2022-07-21 09:21:03,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:03,769 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 [2022-07-21 09:21:03,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2022-07-21 09:21:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:03,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411069186] [2022-07-21 09:21:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:03,796 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:21:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:03,826 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:21:03,827 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:21:03,827 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 09:21:03,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 09:21:03,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:21:03,827 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:03,828 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:21:03,828 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 09:21:03,847 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 09:21:03,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2022-07-21 09:21:03,904 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2022-07-21 09:21:03,904 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 09:21:03,906 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. [2022-07-21 09:21:03,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2022-07-21 09:21:03,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 64 transitions, 173 flow [2022-07-21 09:21:03,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:21:03,914 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@35b4ee25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177417fc [2022-07-21 09:21:03,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 09:21:03,916 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-21 09:21:03,916 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:21:03,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:03,916 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] [2022-07-21 09:21:03,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2022-07-21 09:21:03,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:03,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142607478] [2022-07-21 09:21:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:03,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:03,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142607478] [2022-07-21 09:21:03,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142607478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:03,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:03,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:21:03,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197562261] [2022-07-21 09:21:03,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:03,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:21:03,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:21:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:21:03,930 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2022-07-21 09:21:03,930 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) [2022-07-21 09:21:03,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:03,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2022-07-21 09:21:03,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:03,943 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2022-07-21 09:21:03,943 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-07-21 09:21:03,943 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. [2022-07-21 09:21:03,944 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2022-07-21 09:21:03,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 181 flow [2022-07-21 09:21:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:21:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:21:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-07-21 09:21:03,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2022-07-21 09:21:03,945 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-07-21 09:21:03,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-07-21 09:21:03,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:03,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-07-21 09:21:03,946 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) [2022-07-21 09:21:03,947 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) [2022-07-21 09:21:03,947 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) [2022-07-21 09:21:03,947 INFO L186 Difference]: Start difference. First operand has 74 places, 64 transitions, 173 flow. Second operand 2 states and 152 transitions. [2022-07-21 09:21:03,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 181 flow [2022-07-21 09:21:03,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 161 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:03,949 INFO L242 Difference]: Finished difference. Result has 75 places, 63 transitions, 151 flow [2022-07-21 09:21:03,949 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} [2022-07-21 09:21:03,950 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-07-21 09:21:03,950 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 151 flow [2022-07-21 09:21:03,950 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) [2022-07-21 09:21:03,950 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:03,950 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] [2022-07-21 09:21:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 09:21:03,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2022-07-21 09:21:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262294312] [2022-07-21 09:21:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:03,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262294312] [2022-07-21 09:21:03,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262294312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:03,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:03,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:03,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066296223] [2022-07-21 09:21:03,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:03,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:03,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:03,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2022-07-21 09:21:03,968 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) [2022-07-21 09:21:03,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:03,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2022-07-21 09:21:03,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:03,991 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2022-07-21 09:21:03,992 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:21:03,992 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. [2022-07-21 09:21:03,992 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-07-21 09:21:03,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 191 flow [2022-07-21 09:21:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-21 09:21:03,994 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-21 09:21:03,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-21 09:21:03,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-21 09:21:03,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:03,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-21 09:21:03,995 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) [2022-07-21 09:21:03,996 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) [2022-07-21 09:21:03,996 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) [2022-07-21 09:21:03,996 INFO L186 Difference]: Start difference. First operand has 75 places, 63 transitions, 151 flow. Second operand 3 states and 215 transitions. [2022-07-21 09:21:03,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 191 flow [2022-07-21 09:21:03,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:03,998 INFO L242 Difference]: Finished difference. Result has 78 places, 64 transitions, 163 flow [2022-07-21 09:21:03,998 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} [2022-07-21 09:21:03,998 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-07-21 09:21:03,998 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 163 flow [2022-07-21 09:21:03,999 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) [2022-07-21 09:21:03,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:03,999 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] [2022-07-21 09:21:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 09:21:03,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2022-07-21 09:21:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:04,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613974058] [2022-07-21 09:21:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:21:04,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:04,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613974058] [2022-07-21 09:21:04,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613974058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:04,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:04,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165831638] [2022-07-21 09:21:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:04,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:04,038 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2022-07-21 09:21:04,038 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) [2022-07-21 09:21:04,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:04,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2022-07-21 09:21:04,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:04,113 INFO L129 PetriNetUnfolder]: 212/733 cut-off events. [2022-07-21 09:21:04,113 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-07-21 09:21:04,116 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. [2022-07-21 09:21:04,119 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2022-07-21 09:21:04,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 245 flow [2022-07-21 09:21:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-21 09:21:04,120 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-21 09:21:04,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-21 09:21:04,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-21 09:21:04,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:04,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-21 09:21:04,121 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) [2022-07-21 09:21:04,122 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) [2022-07-21 09:21:04,122 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) [2022-07-21 09:21:04,122 INFO L186 Difference]: Start difference. First operand has 78 places, 64 transitions, 163 flow. Second operand 3 states and 215 transitions. [2022-07-21 09:21:04,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 245 flow [2022-07-21 09:21:04,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:04,124 INFO L242 Difference]: Finished difference. Result has 80 places, 69 transitions, 201 flow [2022-07-21 09:21:04,125 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} [2022-07-21 09:21:04,125 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-07-21 09:21:04,125 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 201 flow [2022-07-21 09:21:04,125 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) [2022-07-21 09:21:04,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:04,126 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] [2022-07-21 09:21:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 09:21:04,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2022-07-21 09:21:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:04,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652473532] [2022-07-21 09:21:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:04,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:04,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652473532] [2022-07-21 09:21:04,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652473532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:04,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686513740] [2022-07-21 09:21:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:04,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:04,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:04,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:04,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:21:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:21:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:04,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:04,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686513740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:04,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:04,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:21:04,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165192045] [2022-07-21 09:21:04,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:04,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:21:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:21:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:21:04,282 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-21 09:21:04,282 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) [2022-07-21 09:21:04,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:04,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-21 09:21:04,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:04,364 INFO L129 PetriNetUnfolder]: 161/489 cut-off events. [2022-07-21 09:21:04,365 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 09:21:04,367 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. [2022-07-21 09:21:04,369 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2022-07-21 09:21:04,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 271 flow [2022-07-21 09:21:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:21:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:21:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2022-07-21 09:21:04,371 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2022-07-21 09:21:04,371 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2022-07-21 09:21:04,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2022-07-21 09:21:04,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:04,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2022-07-21 09:21:04,372 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) [2022-07-21 09:21:04,373 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) [2022-07-21 09:21:04,374 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) [2022-07-21 09:21:04,374 INFO L186 Difference]: Start difference. First operand has 80 places, 69 transitions, 201 flow. Second operand 9 states and 611 transitions. [2022-07-21 09:21:04,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 271 flow [2022-07-21 09:21:04,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:04,376 INFO L242 Difference]: Finished difference. Result has 90 places, 75 transitions, 245 flow [2022-07-21 09:21:04,376 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} [2022-07-21 09:21:04,377 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2022-07-21 09:21:04,377 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 245 flow [2022-07-21 09:21:04,381 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) [2022-07-21 09:21:04,381 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:04,382 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] [2022-07-21 09:21:04,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 09:21:04,595 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 [2022-07-21 09:21:04,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2022-07-21 09:21:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:04,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562684278] [2022-07-21 09:21:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:04,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:21:04,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:04,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562684278] [2022-07-21 09:21:04,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562684278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:04,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775829996] [2022-07-21 09:21:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:04,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:04,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:04,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:04,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:21:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:04,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:21:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:04,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:04,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775829996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:04,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:04,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-07-21 09:21:04,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035038644] [2022-07-21 09:21:04,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:04,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:21:04,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:21:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:21:04,980 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-21 09:21:04,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 245 flow. Second operand has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:04,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:04,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-21 09:21:04,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:07,121 INFO L129 PetriNetUnfolder]: 1890/3692 cut-off events. [2022-07-21 09:21:07,121 INFO L130 PetriNetUnfolder]: For 2300/2300 co-relation queries the response was YES. [2022-07-21 09:21:07,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9428 conditions, 3692 events. 1890/3692 cut-off events. For 2300/2300 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 23537 event pairs, 0 based on Foata normal form. 137/3829 useless extension candidates. Maximal degree in co-relation 9415. Up to 1597 conditions per place. [2022-07-21 09:21:07,164 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 188 selfloop transitions, 291 changer transitions 0/518 dead transitions. [2022-07-21 09:21:07,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 518 transitions, 2986 flow [2022-07-21 09:21:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-21 09:21:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-21 09:21:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5377 transitions. [2022-07-21 09:21:07,189 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6791714033093343 [2022-07-21 09:21:07,190 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5377 transitions. [2022-07-21 09:21:07,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5377 transitions. [2022-07-21 09:21:07,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:07,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5377 transitions. [2022-07-21 09:21:07,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 59.08791208791209) internal successors, (5377), 91 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,247 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,247 INFO L186 Difference]: Start difference. First operand has 90 places, 75 transitions, 245 flow. Second operand 91 states and 5377 transitions. [2022-07-21 09:21:07,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 518 transitions, 2986 flow [2022-07-21 09:21:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 518 transitions, 2879 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-07-21 09:21:07,258 INFO L242 Difference]: Finished difference. Result has 186 places, 344 transitions, 1980 flow [2022-07-21 09:21:07,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1980, PETRI_PLACES=186, PETRI_TRANSITIONS=344} [2022-07-21 09:21:07,259 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 112 predicate places. [2022-07-21 09:21:07,259 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 344 transitions, 1980 flow [2022-07-21 09:21:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:07,260 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] [2022-07-21 09:21:07,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:07,468 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 [2022-07-21 09:21:07,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2022-07-21 09:21:07,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:07,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129882015] [2022-07-21 09:21:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:07,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:07,494 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:21:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:07,518 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:21:07,518 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:21:07,518 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 09:21:07,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 09:21:07,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 09:21:07,519 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 09:21:07,520 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:21:07,520 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 09:21:07,538 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-21 09:21:07,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 94 transitions, 266 flow [2022-07-21 09:21:07,637 INFO L129 PetriNetUnfolder]: 213/1255 cut-off events. [2022-07-21 09:21:07,638 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-21 09:21:07,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1255 events. 213/1255 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6831 event pairs, 72 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 771. Up to 192 conditions per place. [2022-07-21 09:21:07,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 94 transitions, 266 flow [2022-07-21 09:21:07,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 70 transitions, 200 flow [2022-07-21 09:21:07,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:21:07,648 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@35b4ee25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177417fc [2022-07-21 09:21:07,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 09:21:07,650 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-21 09:21:07,650 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:21:07,650 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:07,650 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] [2022-07-21 09:21:07,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash -543324351, now seen corresponding path program 1 times [2022-07-21 09:21:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:07,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064005442] [2022-07-21 09:21:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:07,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:07,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:07,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064005442] [2022-07-21 09:21:07,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064005442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:07,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:07,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200490414] [2022-07-21 09:21:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:07,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:07,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:07,670 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 94 [2022-07-21 09:21:07,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:07,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 94 [2022-07-21 09:21:07,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:07,696 INFO L129 PetriNetUnfolder]: 0/133 cut-off events. [2022-07-21 09:21:07,696 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 09:21:07,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 133 events. 0/133 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-21 09:21:07,697 INFO L132 encePairwiseOnDemand]: 90/94 looper letters, 15 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-07-21 09:21:07,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 240 flow [2022-07-21 09:21:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-07-21 09:21:07,700 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8262411347517731 [2022-07-21 09:21:07,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-07-21 09:21:07,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-07-21 09:21:07,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:07,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-07-21 09:21:07,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,702 INFO L186 Difference]: Start difference. First operand has 82 places, 70 transitions, 200 flow. Second operand 3 states and 233 transitions. [2022-07-21 09:21:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 240 flow [2022-07-21 09:21:07,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 210 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:07,704 INFO L242 Difference]: Finished difference. Result has 85 places, 70 transitions, 180 flow [2022-07-21 09:21:07,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2022-07-21 09:21:07,705 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2022-07-21 09:21:07,706 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 180 flow [2022-07-21 09:21:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,706 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:07,706 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] [2022-07-21 09:21:07,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 09:21:07,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1763634818, now seen corresponding path program 1 times [2022-07-21 09:21:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:07,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293377188] [2022-07-21 09:21:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:21:07,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:07,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293377188] [2022-07-21 09:21:07,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293377188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:07,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:07,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193023312] [2022-07-21 09:21:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:07,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:07,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-07-21 09:21:07,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:07,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-07-21 09:21:07,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:07,875 INFO L129 PetriNetUnfolder]: 558/1515 cut-off events. [2022-07-21 09:21:07,875 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-21 09:21:07,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1515 events. 558/1515 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9653 event pairs, 345 based on Foata normal form. 6/1451 useless extension candidates. Maximal degree in co-relation 2522. Up to 799 conditions per place. [2022-07-21 09:21:07,890 INFO L132 encePairwiseOnDemand]: 86/94 looper letters, 19 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2022-07-21 09:21:07,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 279 flow [2022-07-21 09:21:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2022-07-21 09:21:07,892 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8191489361702128 [2022-07-21 09:21:07,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2022-07-21 09:21:07,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2022-07-21 09:21:07,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:07,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2022-07-21 09:21:07,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,894 INFO L186 Difference]: Start difference. First operand has 85 places, 70 transitions, 180 flow. Second operand 3 states and 231 transitions. [2022-07-21 09:21:07,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 279 flow [2022-07-21 09:21:07,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:07,896 INFO L242 Difference]: Finished difference. Result has 87 places, 76 transitions, 225 flow [2022-07-21 09:21:07,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2022-07-21 09:21:07,897 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2022-07-21 09:21:07,897 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 225 flow [2022-07-21 09:21:07,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:07,897 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:07,897 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] [2022-07-21 09:21:07,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 09:21:07,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash -35190009, now seen corresponding path program 1 times [2022-07-21 09:21:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:07,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421140794] [2022-07-21 09:21:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:07,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:07,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:07,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421140794] [2022-07-21 09:21:07,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421140794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:07,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925073739] [2022-07-21 09:21:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:07,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:07,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:07,927 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) [2022-07-21 09:21:07,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:21:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:07,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:21:07,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:08,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:08,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925073739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:08,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:08,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:21:08,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190690257] [2022-07-21 09:21:08,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:08,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:21:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:21:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:21:08,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 94 [2022-07-21 09:21:08,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 225 flow. Second operand has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:08,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:08,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 94 [2022-07-21 09:21:08,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:08,237 INFO L129 PetriNetUnfolder]: 427/1047 cut-off events. [2022-07-21 09:21:08,238 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 09:21:08,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1744 conditions, 1047 events. 427/1047 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6187 event pairs, 272 based on Foata normal form. 2/947 useless extension candidates. Maximal degree in co-relation 1679. Up to 607 conditions per place. [2022-07-21 09:21:08,247 INFO L132 encePairwiseOnDemand]: 88/94 looper letters, 16 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2022-07-21 09:21:08,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 297 flow [2022-07-21 09:21:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:21:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:21:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 657 transitions. [2022-07-21 09:21:08,249 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.776595744680851 [2022-07-21 09:21:08,249 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 657 transitions. [2022-07-21 09:21:08,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 657 transitions. [2022-07-21 09:21:08,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:08,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 657 transitions. [2022-07-21 09:21:08,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:08,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:08,252 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:08,252 INFO L186 Difference]: Start difference. First operand has 87 places, 76 transitions, 225 flow. Second operand 9 states and 657 transitions. [2022-07-21 09:21:08,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 297 flow [2022-07-21 09:21:08,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:08,254 INFO L242 Difference]: Finished difference. Result has 97 places, 82 transitions, 268 flow [2022-07-21 09:21:08,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=268, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2022-07-21 09:21:08,256 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 15 predicate places. [2022-07-21 09:21:08,256 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 268 flow [2022-07-21 09:21:08,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:08,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:08,257 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] [2022-07-21 09:21:08,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:08,463 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,SelfDestructingSolverStorable28 [2022-07-21 09:21:08,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1143993960, now seen corresponding path program 1 times [2022-07-21 09:21:08,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:08,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522493893] [2022-07-21 09:21:08,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:08,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:21:08,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:08,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522493893] [2022-07-21 09:21:08,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522493893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:08,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89992809] [2022-07-21 09:21:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:08,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:08,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:08,513 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) [2022-07-21 09:21:08,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:21:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:21:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:21:08,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:21:08,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89992809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:08,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:08,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-21 09:21:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701923843] [2022-07-21 09:21:08,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:08,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:21:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:21:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:21:08,774 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 94 [2022-07-21 09:21:08,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 268 flow. Second operand has 15 states, 15 states have (on average 61.6) internal successors, (924), 15 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:08,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:08,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 94 [2022-07-21 09:21:08,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:09,907 INFO L129 PetriNetUnfolder]: 5425/10769 cut-off events. [2022-07-21 09:21:09,907 INFO L130 PetriNetUnfolder]: For 6142/6202 co-relation queries the response was YES. [2022-07-21 09:21:09,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26797 conditions, 10769 events. 5425/10769 cut-off events. For 6142/6202 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 82838 event pairs, 738 based on Foata normal form. 61/10830 useless extension candidates. Maximal degree in co-relation 11329. Up to 5002 conditions per place. [2022-07-21 09:21:10,030 INFO L132 encePairwiseOnDemand]: 80/94 looper letters, 94 selfloop transitions, 82 changer transitions 0/223 dead transitions. [2022-07-21 09:21:10,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 223 transitions, 1291 flow [2022-07-21 09:21:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 09:21:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-21 09:21:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1270 transitions. [2022-07-21 09:21:10,034 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7110862262038073 [2022-07-21 09:21:10,034 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1270 transitions. [2022-07-21 09:21:10,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1270 transitions. [2022-07-21 09:21:10,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:10,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1270 transitions. [2022-07-21 09:21:10,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.84210526315789) internal successors, (1270), 19 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:10,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 94.0) internal successors, (1880), 20 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:10,039 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 94.0) internal successors, (1880), 20 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:10,039 INFO L186 Difference]: Start difference. First operand has 97 places, 82 transitions, 268 flow. Second operand 19 states and 1270 transitions. [2022-07-21 09:21:10,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 223 transitions, 1291 flow [2022-07-21 09:21:10,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 223 transitions, 1263 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:10,049 INFO L242 Difference]: Finished difference. Result has 116 places, 149 transitions, 757 flow [2022-07-21 09:21:10,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=757, PETRI_PLACES=116, PETRI_TRANSITIONS=149} [2022-07-21 09:21:10,049 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 34 predicate places. [2022-07-21 09:21:10,050 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 149 transitions, 757 flow [2022-07-21 09:21:10,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.6) internal successors, (924), 15 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:10,056 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:10,056 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] [2022-07-21 09:21:10,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:10,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:10,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash 95950356, now seen corresponding path program 1 times [2022-07-21 09:21:10,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:10,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662129265] [2022-07-21 09:21:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:10,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:21:10,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:10,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662129265] [2022-07-21 09:21:10,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662129265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:10,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49566269] [2022-07-21 09:21:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:10,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:10,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:10,340 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) [2022-07-21 09:21:10,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:21:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:21:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:21:10,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:21:10,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49566269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:10,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:10,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 09:21:10,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036326465] [2022-07-21 09:21:10,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:21:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:21:10,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:21:10,633 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 94 [2022-07-21 09:21:10,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 149 transitions, 757 flow. Second operand has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:10,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:10,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 94 [2022-07-21 09:21:10,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:13,531 INFO L129 PetriNetUnfolder]: 13401/27115 cut-off events. [2022-07-21 09:21:13,531 INFO L130 PetriNetUnfolder]: For 30676/30700 co-relation queries the response was YES. [2022-07-21 09:21:13,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87378 conditions, 27115 events. 13401/27115 cut-off events. For 30676/30700 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 250293 event pairs, 1145 based on Foata normal form. 128/27243 useless extension candidates. Maximal degree in co-relation 34941. Up to 11453 conditions per place. [2022-07-21 09:21:14,018 INFO L132 encePairwiseOnDemand]: 78/94 looper letters, 149 selfloop transitions, 220 changer transitions 0/421 dead transitions. [2022-07-21 09:21:14,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 421 transitions, 3211 flow [2022-07-21 09:21:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:21:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-21 09:21:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2588 transitions. [2022-07-21 09:21:14,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6715101193565127 [2022-07-21 09:21:14,024 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2588 transitions. [2022-07-21 09:21:14,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2588 transitions. [2022-07-21 09:21:14,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:14,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2588 transitions. [2022-07-21 09:21:14,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 63.1219512195122) internal successors, (2588), 41 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:14,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:14,035 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:14,035 INFO L186 Difference]: Start difference. First operand has 116 places, 149 transitions, 757 flow. Second operand 41 states and 2588 transitions. [2022-07-21 09:21:14,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 421 transitions, 3211 flow [2022-07-21 09:21:14,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 421 transitions, 3189 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-21 09:21:14,143 INFO L242 Difference]: Finished difference. Result has 156 places, 311 transitions, 2301 flow [2022-07-21 09:21:14,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2301, PETRI_PLACES=156, PETRI_TRANSITIONS=311} [2022-07-21 09:21:14,144 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 74 predicate places. [2022-07-21 09:21:14,144 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 311 transitions, 2301 flow [2022-07-21 09:21:14,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:14,145 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:14,145 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] [2022-07-21 09:21:14,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:14,359 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,SelfDestructingSolverStorable30 [2022-07-21 09:21:14,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1512434496, now seen corresponding path program 1 times [2022-07-21 09:21:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227950445] [2022-07-21 09:21:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:14,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:14,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227950445] [2022-07-21 09:21:14,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227950445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722945647] [2022-07-21 09:21:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:14,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:14,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:14,428 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) [2022-07-21 09:21:14,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:21:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:21:14,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:14,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:14,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722945647] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:14,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:14,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-07-21 09:21:14,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595460933] [2022-07-21 09:21:14,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:14,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:21:14,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:21:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:21:14,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 94 [2022-07-21 09:21:14,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 311 transitions, 2301 flow. Second operand has 24 states, 24 states have (on average 60.75) internal successors, (1458), 24 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:14,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:14,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 94 [2022-07-21 09:21:14,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:21,631 INFO L129 PetriNetUnfolder]: 25947/47397 cut-off events. [2022-07-21 09:21:21,631 INFO L130 PetriNetUnfolder]: For 200844/200952 co-relation queries the response was YES. [2022-07-21 09:21:22,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193734 conditions, 47397 events. 25947/47397 cut-off events. For 200844/200952 co-relation queries the response was YES. Maximal size of possible extension queue 1876. Compared 431649 event pairs, 688 based on Foata normal form. 828/48224 useless extension candidates. Maximal degree in co-relation 90843. Up to 19871 conditions per place. [2022-07-21 09:21:22,609 INFO L132 encePairwiseOnDemand]: 77/94 looper letters, 719 selfloop transitions, 1347 changer transitions 0/2136 dead transitions. [2022-07-21 09:21:22,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 2136 transitions, 22837 flow [2022-07-21 09:21:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-21 09:21:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-21 09:21:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5312 transitions. [2022-07-21 09:21:22,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2022-07-21 09:21:22,618 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5312 transitions. [2022-07-21 09:21:22,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5312 transitions. [2022-07-21 09:21:22,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:22,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5312 transitions. [2022-07-21 09:21:22,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 64.0) internal successors, (5312), 83 states have internal predecessors, (5312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:22,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 94.0) internal successors, (7896), 84 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:22,650 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 94.0) internal successors, (7896), 84 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:22,650 INFO L186 Difference]: Start difference. First operand has 156 places, 311 transitions, 2301 flow. Second operand 83 states and 5312 transitions. [2022-07-21 09:21:22,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 2136 transitions, 22837 flow [2022-07-21 09:21:23,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 2136 transitions, 22653 flow, removed 39 selfloop flow, removed 12 redundant places. [2022-07-21 09:21:23,340 INFO L242 Difference]: Finished difference. Result has 257 places, 1520 transitions, 17156 flow [2022-07-21 09:21:23,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=17156, PETRI_PLACES=257, PETRI_TRANSITIONS=1520} [2022-07-21 09:21:23,341 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 175 predicate places. [2022-07-21 09:21:23,341 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 1520 transitions, 17156 flow [2022-07-21 09:21:23,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.75) internal successors, (1458), 24 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:23,342 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:23,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:23,546 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,SelfDestructingSolverStorable31 [2022-07-21 09:21:23,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2072494017, now seen corresponding path program 1 times [2022-07-21 09:21:23,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:23,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311836126] [2022-07-21 09:21:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:23,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:23,567 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:21:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:23,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:21:23,584 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:21:23,584 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 09:21:23,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 09:21:23,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-21 09:21:23,585 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:23,585 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:21:23,585 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-21 09:21:23,598 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-21 09:21:23,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 101 transitions, 300 flow [2022-07-21 09:21:23,844 INFO L129 PetriNetUnfolder]: 472/2430 cut-off events. [2022-07-21 09:21:23,844 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-21 09:21:23,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 2430 events. 472/2430 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16314 event pairs, 201 based on Foata normal form. 0/2142 useless extension candidates. Maximal degree in co-relation 1473. Up to 448 conditions per place. [2022-07-21 09:21:23,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 101 transitions, 300 flow [2022-07-21 09:21:23,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 76 transitions, 229 flow [2022-07-21 09:21:23,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:21:23,861 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@35b4ee25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177417fc [2022-07-21 09:21:23,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 09:21:23,863 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-21 09:21:23,863 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:21:23,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:23,863 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] [2022-07-21 09:21:23,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash -196252411, now seen corresponding path program 1 times [2022-07-21 09:21:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112748671] [2022-07-21 09:21:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:23,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112748671] [2022-07-21 09:21:23,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112748671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:23,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:23,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:21:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117481526] [2022-07-21 09:21:23,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:21:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:21:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:21:23,875 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 101 [2022-07-21 09:21:23,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 229 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 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) [2022-07-21 09:21:23,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:23,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 101 [2022-07-21 09:21:23,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:23,890 INFO L129 PetriNetUnfolder]: 0/154 cut-off events. [2022-07-21 09:21:23,891 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-07-21 09:21:23,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 154 events. 0/154 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 125 event pairs, 0 based on Foata normal form. 8/154 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-07-21 09:21:23,891 INFO L132 encePairwiseOnDemand]: 100/101 looper letters, 7 selfloop transitions, 0 changer transitions 0/75 dead transitions. [2022-07-21 09:21:23,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 241 flow [2022-07-21 09:21:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:21:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:21:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2022-07-21 09:21:23,893 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8613861386138614 [2022-07-21 09:21:23,893 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2022-07-21 09:21:23,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2022-07-21 09:21:23,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:23,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2022-07-21 09:21:23,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,894 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,894 INFO L186 Difference]: Start difference. First operand has 90 places, 76 transitions, 229 flow. Second operand 2 states and 174 transitions. [2022-07-21 09:21:23,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 241 flow [2022-07-21 09:21:23,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 75 transitions, 199 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:23,896 INFO L242 Difference]: Finished difference. Result has 91 places, 75 transitions, 185 flow [2022-07-21 09:21:23,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=185, PETRI_PLACES=91, PETRI_TRANSITIONS=75} [2022-07-21 09:21:23,900 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2022-07-21 09:21:23,900 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 185 flow [2022-07-21 09:21:23,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 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) [2022-07-21 09:21:23,901 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:23,901 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] [2022-07-21 09:21:23,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 09:21:23,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash -196251450, now seen corresponding path program 1 times [2022-07-21 09:21:23,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182911071] [2022-07-21 09:21:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:23,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:23,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182911071] [2022-07-21 09:21:23,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182911071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:23,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:23,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:23,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552026256] [2022-07-21 09:21:23,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:23,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:23,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:23,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:23,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 101 [2022-07-21 09:21:23,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 75 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:23,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 101 [2022-07-21 09:21:23,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:23,941 INFO L129 PetriNetUnfolder]: 0/151 cut-off events. [2022-07-21 09:21:23,942 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 09:21:23,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 151 events. 0/151 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 119 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-21 09:21:23,942 INFO L132 encePairwiseOnDemand]: 98/101 looper letters, 16 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-07-21 09:21:23,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 229 flow [2022-07-21 09:21:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2022-07-21 09:21:23,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2022-07-21 09:21:23,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2022-07-21 09:21:23,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2022-07-21 09:21:23,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:23,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2022-07-21 09:21:23,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,946 INFO L186 Difference]: Start difference. First operand has 91 places, 75 transitions, 185 flow. Second operand 3 states and 247 transitions. [2022-07-21 09:21:23,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 229 flow [2022-07-21 09:21:23,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 79 transitions, 229 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:23,948 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 197 flow [2022-07-21 09:21:23,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2022-07-21 09:21:23,950 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2022-07-21 09:21:23,950 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 197 flow [2022-07-21 09:21:23,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,950 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:23,951 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] [2022-07-21 09:21:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-21 09:21:23,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1335463192, now seen corresponding path program 1 times [2022-07-21 09:21:23,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:23,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704882847] [2022-07-21 09:21:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:21:23,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704882847] [2022-07-21 09:21:23,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704882847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:23,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:23,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:23,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322798363] [2022-07-21 09:21:23,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:23,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:23,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:23,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 101 [2022-07-21 09:21:23,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:23,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:23,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 101 [2022-07-21 09:21:23,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:24,180 INFO L129 PetriNetUnfolder]: 1383/3169 cut-off events. [2022-07-21 09:21:24,180 INFO L130 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-07-21 09:21:24,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 3169 events. 1383/3169 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22218 event pairs, 924 based on Foata normal form. 7/3050 useless extension candidates. Maximal degree in co-relation 5500. Up to 1878 conditions per place. [2022-07-21 09:21:24,204 INFO L132 encePairwiseOnDemand]: 92/101 looper letters, 22 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2022-07-21 09:21:24,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 313 flow [2022-07-21 09:21:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2022-07-21 09:21:24,205 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2022-07-21 09:21:24,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2022-07-21 09:21:24,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2022-07-21 09:21:24,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:24,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2022-07-21 09:21:24,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:24,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:24,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:24,207 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 197 flow. Second operand 3 states and 247 transitions. [2022-07-21 09:21:24,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 313 flow [2022-07-21 09:21:24,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 89 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:24,209 INFO L242 Difference]: Finished difference. Result has 96 places, 83 transitions, 249 flow [2022-07-21 09:21:24,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2022-07-21 09:21:24,210 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2022-07-21 09:21:24,210 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 249 flow [2022-07-21 09:21:24,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:24,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:24,211 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] [2022-07-21 09:21:24,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-21 09:21:24,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1177190386, now seen corresponding path program 1 times [2022-07-21 09:21:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:24,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978169726] [2022-07-21 09:21:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:24,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978169726] [2022-07-21 09:21:24,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978169726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86819124] [2022-07-21 09:21:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:24,238 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:24,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:21:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:21:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:24,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:24,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86819124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:24,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:24,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-21 09:21:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396397559] [2022-07-21 09:21:24,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:21:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:21:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:21:24,413 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-07-21 09:21:24,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 249 flow. Second operand has 15 states, 15 states have (on average 64.6) internal successors, (969), 15 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:24,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:24,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-07-21 09:21:24,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:27,062 INFO L129 PetriNetUnfolder]: 15174/27505 cut-off events. [2022-07-21 09:21:27,062 INFO L130 PetriNetUnfolder]: For 6431/6431 co-relation queries the response was YES. [2022-07-21 09:21:27,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64554 conditions, 27505 events. 15174/27505 cut-off events. For 6431/6431 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 222978 event pairs, 3397 based on Foata normal form. 130/27635 useless extension candidates. Maximal degree in co-relation 64541. Up to 14077 conditions per place. [2022-07-21 09:21:27,297 INFO L132 encePairwiseOnDemand]: 83/101 looper letters, 118 selfloop transitions, 103 changer transitions 0/269 dead transitions. [2022-07-21 09:21:27,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 269 transitions, 1442 flow [2022-07-21 09:21:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:21:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:21:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2134 transitions. [2022-07-21 09:21:27,299 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6815713829447461 [2022-07-21 09:21:27,300 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2134 transitions. [2022-07-21 09:21:27,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2134 transitions. [2022-07-21 09:21:27,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:27,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2134 transitions. [2022-07-21 09:21:27,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 68.83870967741936) internal successors, (2134), 31 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:27,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 101.0) internal successors, (3232), 32 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:27,307 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 101.0) internal successors, (3232), 32 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:27,308 INFO L186 Difference]: Start difference. First operand has 96 places, 83 transitions, 249 flow. Second operand 31 states and 2134 transitions. [2022-07-21 09:21:27,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 269 transitions, 1442 flow [2022-07-21 09:21:27,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 269 transitions, 1396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:27,313 INFO L242 Difference]: Finished difference. Result has 136 places, 175 transitions, 873 flow [2022-07-21 09:21:27,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=873, PETRI_PLACES=136, PETRI_TRANSITIONS=175} [2022-07-21 09:21:27,314 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 46 predicate places. [2022-07-21 09:21:27,314 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 175 transitions, 873 flow [2022-07-21 09:21:27,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.6) internal successors, (969), 15 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:27,315 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:27,315 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:27,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:27,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 09:21:27,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 722649244, now seen corresponding path program 1 times [2022-07-21 09:21:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158629757] [2022-07-21 09:21:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:27,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:27,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158629757] [2022-07-21 09:21:27,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158629757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:27,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357479978] [2022-07-21 09:21:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:27,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:27,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:27,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:21:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:21:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:27,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:27,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357479978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:27,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:27,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-07-21 09:21:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85528492] [2022-07-21 09:21:27,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:27,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:21:27,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:27,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:21:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:21:27,847 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-07-21 09:21:27,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 175 transitions, 873 flow. Second operand has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:27,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:27,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-07-21 09:21:27,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:35,261 INFO L129 PetriNetUnfolder]: 33304/58966 cut-off events. [2022-07-21 09:21:35,262 INFO L130 PetriNetUnfolder]: For 107223/107230 co-relation queries the response was YES. [2022-07-21 09:21:35,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 211612 conditions, 58966 events. 33304/58966 cut-off events. For 107223/107230 co-relation queries the response was YES. Maximal size of possible extension queue 1957. Compared 524977 event pairs, 3741 based on Foata normal form. 301/59267 useless extension candidates. Maximal degree in co-relation 211588. Up to 29419 conditions per place. [2022-07-21 09:21:36,149 INFO L132 encePairwiseOnDemand]: 83/101 looper letters, 233 selfloop transitions, 351 changer transitions 0/648 dead transitions. [2022-07-21 09:21:36,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 648 transitions, 4914 flow [2022-07-21 09:21:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 09:21:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-21 09:21:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3982 transitions. [2022-07-21 09:21:36,153 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.668232924987414 [2022-07-21 09:21:36,153 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3982 transitions. [2022-07-21 09:21:36,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3982 transitions. [2022-07-21 09:21:36,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:36,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3982 transitions. [2022-07-21 09:21:36,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 67.49152542372882) internal successors, (3982), 59 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:36,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 101.0) internal successors, (6060), 60 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:36,166 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 101.0) internal successors, (6060), 60 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:36,167 INFO L186 Difference]: Start difference. First operand has 136 places, 175 transitions, 873 flow. Second operand 59 states and 3982 transitions. [2022-07-21 09:21:36,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 648 transitions, 4914 flow [2022-07-21 09:21:36,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 648 transitions, 4747 flow, removed 65 selfloop flow, removed 6 redundant places. [2022-07-21 09:21:36,807 INFO L242 Difference]: Finished difference. Result has 209 places, 474 transitions, 3790 flow [2022-07-21 09:21:36,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=3790, PETRI_PLACES=209, PETRI_TRANSITIONS=474} [2022-07-21 09:21:36,808 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 119 predicate places. [2022-07-21 09:21:36,808 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 474 transitions, 3790 flow [2022-07-21 09:21:36,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:36,809 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:36,809 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:36,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:37,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:37,032 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash -240865470, now seen corresponding path program 1 times [2022-07-21 09:21:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:37,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965198993] [2022-07-21 09:21:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:21:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965198993] [2022-07-21 09:21:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965198993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321510876] [2022-07-21 09:21:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:37,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:37,122 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:37,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:21:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:37,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:21:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:21:37,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:21:37,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321510876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:37,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:37,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-21 09:21:37,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492354736] [2022-07-21 09:21:37,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:37,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:21:37,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:37,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:21:37,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:21:37,446 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-07-21 09:21:37,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 474 transitions, 3790 flow. Second operand has 24 states, 24 states have (on average 65.0) internal successors, (1560), 24 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:37,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:37,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-07-21 09:21:37,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand