./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:30:03,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:30:03,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:30:03,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:30:03,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:30:03,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:30:03,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:30:03,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:30:03,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:30:03,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:30:03,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:30:03,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:30:03,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:30:03,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:30:03,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:30:03,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:30:03,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:30:03,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:30:03,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:30:03,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:30:03,380 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:30:03,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:30:03,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:30:03,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:30:03,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:30:03,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:30:03,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:30:03,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:30:03,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:30:03,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:30:03,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:30:03,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:30:03,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:30:03,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:30:03,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:30:03,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:30:03,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:30:03,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:30:03,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:30:03,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:30:03,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:30:03,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:30:03,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:30:03,439 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:30:03,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:30:03,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:30:03,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:30:03,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:30:03,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:30:03,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:30:03,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:30:03,442 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:30:03,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:30:03,443 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:30:03,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:30:03,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:30:03,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:30:03,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:30:03,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:30:03,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:30:03,444 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:30:03,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:30:03,445 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:30:03,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:30:03,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:30:03,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:30:03,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:30:03,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:30:03,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:30:03,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:30:03,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:30:03,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:30:03,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:30:03,447 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:30:03,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:30:03,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:30:03,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-07-12 10:30:03,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:30:03,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:30:03,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:30:03,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:30:03,760 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:30:03,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-12 10:30:03,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5c1867c/ea88e4e2e60742ce8ef1aaf1854e00cf/FLAG0aa95baad [2022-07-12 10:30:04,244 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:30:04,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-12 10:30:04,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5c1867c/ea88e4e2e60742ce8ef1aaf1854e00cf/FLAG0aa95baad [2022-07-12 10:30:04,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5c1867c/ea88e4e2e60742ce8ef1aaf1854e00cf [2022-07-12 10:30:04,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:30:04,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:30:04,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:30:04,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:30:04,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:30:04,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47140c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04, skipping insertion in model container [2022-07-12 10:30:04,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:30:04,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:30:04,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-07-12 10:30:04,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:30:04,500 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:30:04,523 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-07-12 10:30:04,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:30:04,548 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:30:04,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04 WrapperNode [2022-07-12 10:30:04,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:30:04,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:30:04,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:30:04,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:30:04,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,600 INFO L137 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 333 [2022-07-12 10:30:04,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:30:04,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:30:04,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:30:04,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:30:04,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:30:04,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:30:04,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:30:04,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:30:04,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (1/1) ... [2022-07-12 10:30:04,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:30:04,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:04,681 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) [2022-07-12 10:30:04,696 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 [2022-07-12 10:30:04,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:30:04,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:30:04,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:30:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:30:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:30:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:30:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:30:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:30:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:30:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:30:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:30:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:30:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:30:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:30:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:30:04,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:30:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:30:04,725 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:30:04,804 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:30:04,806 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:30:05,249 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:30:05,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:30:05,482 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 10:30:05,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:30:05 BoogieIcfgContainer [2022-07-12 10:30:05,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:30:05,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:30:05,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:30:05,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:30:05,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:30:04" (1/3) ... [2022-07-12 10:30:05,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf3b941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:30:05, skipping insertion in model container [2022-07-12 10:30:05,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:30:04" (2/3) ... [2022-07-12 10:30:05,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf3b941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:30:05, skipping insertion in model container [2022-07-12 10:30:05,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:30:05" (3/3) ... [2022-07-12 10:30:05,494 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2022-07-12 10:30:05,499 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:30:05,507 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:30:05,508 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:30:05,508 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:30:05,585 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:30:05,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 254 transitions, 532 flow [2022-07-12 10:30:05,735 INFO L129 PetriNetUnfolder]: 19/251 cut-off events. [2022-07-12 10:30:05,736 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:30:05,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 251 events. 19/251 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2022-07-12 10:30:05,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 254 transitions, 532 flow [2022-07-12 10:30:05,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 240 transitions, 498 flow [2022-07-12 10:30:05,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:30:05,777 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@1d56ad66, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c94cfef [2022-07-12 10:30:05,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:30:05,843 INFO L129 PetriNetUnfolder]: 19/239 cut-off events. [2022-07-12 10:30:05,843 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:30:05,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:05,845 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:05,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1728033997, now seen corresponding path program 1 times [2022-07-12 10:30:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:05,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470165609] [2022-07-12 10:30:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:05,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:06,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:06,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470165609] [2022-07-12 10:30:06,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470165609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:06,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:06,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:30:06,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274378098] [2022-07-12 10:30:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:06,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:30:06,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:30:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:30:06,203 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 254 [2022-07-12 10:30:06,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 240 transitions, 498 flow. Second operand has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:06,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 254 [2022-07-12 10:30:06,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:06,327 INFO L129 PetriNetUnfolder]: 66/311 cut-off events. [2022-07-12 10:30:06,327 INFO L130 PetriNetUnfolder]: For 34/35 co-relation queries the response was YES. [2022-07-12 10:30:06,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 311 events. 66/311 cut-off events. For 34/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 446 event pairs, 31 based on Foata normal form. 42/332 useless extension candidates. Maximal degree in co-relation 251. Up to 99 conditions per place. [2022-07-12 10:30:06,332 INFO L132 encePairwiseOnDemand]: 241/254 looper letters, 14 selfloop transitions, 0 changer transitions 7/227 dead transitions. [2022-07-12 10:30:06,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 227 transitions, 500 flow [2022-07-12 10:30:06,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:30:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:30:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-07-12 10:30:06,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9429133858267716 [2022-07-12 10:30:06,352 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-07-12 10:30:06,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-07-12 10:30:06,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:06,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-07-12 10:30:06,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,371 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,373 INFO L186 Difference]: Start difference. First operand has 231 places, 240 transitions, 498 flow. Second operand 2 states and 479 transitions. [2022-07-12 10:30:06,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 227 transitions, 500 flow [2022-07-12 10:30:06,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 227 transitions, 488 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:30:06,382 INFO L242 Difference]: Finished difference. Result has 226 places, 220 transitions, 446 flow [2022-07-12 10:30:06,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=446, PETRI_PLACES=226, PETRI_TRANSITIONS=220} [2022-07-12 10:30:06,388 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-12 10:30:06,388 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 220 transitions, 446 flow [2022-07-12 10:30:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:06,389 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:06,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:30:06,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1182409905, now seen corresponding path program 1 times [2022-07-12 10:30:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:06,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285429632] [2022-07-12 10:30:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285429632] [2022-07-12 10:30:06,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285429632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:06,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:06,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:30:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703178971] [2022-07-12 10:30:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:06,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:30:06,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:06,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:30:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:30:06,703 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 254 [2022-07-12 10:30:06,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 220 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:06,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 254 [2022-07-12 10:30:06,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:06,857 INFO L129 PetriNetUnfolder]: 79/371 cut-off events. [2022-07-12 10:30:06,857 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-12 10:30:06,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 371 events. 79/371 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 754 event pairs, 8 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 539. Up to 115 conditions per place. [2022-07-12 10:30:06,860 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 48 selfloop transitions, 4 changer transitions 4/232 dead transitions. [2022-07-12 10:30:06,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 232 transitions, 587 flow [2022-07-12 10:30:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:30:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:30:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2022-07-12 10:30:06,864 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7889763779527559 [2022-07-12 10:30:06,864 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2022-07-12 10:30:06,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2022-07-12 10:30:06,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:06,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2022-07-12 10:30:06,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,872 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,872 INFO L186 Difference]: Start difference. First operand has 226 places, 220 transitions, 446 flow. Second operand 5 states and 1002 transitions. [2022-07-12 10:30:06,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 232 transitions, 587 flow [2022-07-12 10:30:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 232 transitions, 587 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:30:06,878 INFO L242 Difference]: Finished difference. Result has 226 places, 223 transitions, 476 flow [2022-07-12 10:30:06,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=226, PETRI_TRANSITIONS=223} [2022-07-12 10:30:06,879 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-12 10:30:06,879 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 223 transitions, 476 flow [2022-07-12 10:30:06,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:06,880 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:06,880 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:06,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:30:06,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash 811659123, now seen corresponding path program 1 times [2022-07-12 10:30:06,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:06,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619372183] [2022-07-12 10:30:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:06,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:07,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:07,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619372183] [2022-07-12 10:30:07,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619372183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:07,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:07,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:30:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035599339] [2022-07-12 10:30:07,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:30:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:30:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:30:07,050 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-12 10:30:07,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 223 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:07,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-12 10:30:07,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:07,279 INFO L129 PetriNetUnfolder]: 83/511 cut-off events. [2022-07-12 10:30:07,279 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-12 10:30:07,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 511 events. 83/511 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1273 event pairs, 36 based on Foata normal form. 13/495 useless extension candidates. Maximal degree in co-relation 794. Up to 145 conditions per place. [2022-07-12 10:30:07,283 INFO L132 encePairwiseOnDemand]: 242/254 looper letters, 51 selfloop transitions, 8 changer transitions 32/259 dead transitions. [2022-07-12 10:30:07,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 259 transitions, 739 flow [2022-07-12 10:30:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:30:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:30:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1783 transitions. [2022-07-12 10:30:07,287 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7799650043744532 [2022-07-12 10:30:07,287 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1783 transitions. [2022-07-12 10:30:07,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1783 transitions. [2022-07-12 10:30:07,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:07,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1783 transitions. [2022-07-12 10:30:07,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.11111111111111) internal successors, (1783), 9 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,297 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,297 INFO L186 Difference]: Start difference. First operand has 226 places, 223 transitions, 476 flow. Second operand 9 states and 1783 transitions. [2022-07-12 10:30:07,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 259 transitions, 739 flow [2022-07-12 10:30:07,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 259 transitions, 730 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-12 10:30:07,304 INFO L242 Difference]: Finished difference. Result has 231 places, 224 transitions, 502 flow [2022-07-12 10:30:07,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=502, PETRI_PLACES=231, PETRI_TRANSITIONS=224} [2022-07-12 10:30:07,305 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 0 predicate places. [2022-07-12 10:30:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 224 transitions, 502 flow [2022-07-12 10:30:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,306 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:07,306 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:30:07,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1273864345, now seen corresponding path program 1 times [2022-07-12 10:30:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053248165] [2022-07-12 10:30:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:07,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:30:07,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:07,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053248165] [2022-07-12 10:30:07,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053248165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:07,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:07,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:30:07,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622178015] [2022-07-12 10:30:07,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:07,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:30:07,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:07,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:30:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:30:07,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-12 10:30:07,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 224 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:07,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-12 10:30:07,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:07,617 INFO L129 PetriNetUnfolder]: 84/434 cut-off events. [2022-07-12 10:30:07,617 INFO L130 PetriNetUnfolder]: For 88/89 co-relation queries the response was YES. [2022-07-12 10:30:07,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 434 events. 84/434 cut-off events. For 88/89 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1118 event pairs, 40 based on Foata normal form. 12/416 useless extension candidates. Maximal degree in co-relation 699. Up to 104 conditions per place. [2022-07-12 10:30:07,620 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 26 selfloop transitions, 6 changer transitions 0/232 dead transitions. [2022-07-12 10:30:07,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 232 transitions, 593 flow [2022-07-12 10:30:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:30:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:30:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-07-12 10:30:07,623 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8927165354330708 [2022-07-12 10:30:07,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-07-12 10:30:07,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-07-12 10:30:07,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:07,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-07-12 10:30:07,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,630 INFO L186 Difference]: Start difference. First operand has 231 places, 224 transitions, 502 flow. Second operand 4 states and 907 transitions. [2022-07-12 10:30:07,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 232 transitions, 593 flow [2022-07-12 10:30:07,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 232 transitions, 579 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:30:07,636 INFO L242 Difference]: Finished difference. Result has 228 places, 224 transitions, 504 flow [2022-07-12 10:30:07,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=504, PETRI_PLACES=228, PETRI_TRANSITIONS=224} [2022-07-12 10:30:07,637 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -3 predicate places. [2022-07-12 10:30:07,637 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 224 transitions, 504 flow [2022-07-12 10:30:07,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,638 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:07,638 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:07,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:30:07,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash 642704095, now seen corresponding path program 1 times [2022-07-12 10:30:07,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:07,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208376131] [2022-07-12 10:30:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:30:07,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:07,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208376131] [2022-07-12 10:30:07,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208376131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:07,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:07,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:30:07,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60907990] [2022-07-12 10:30:07,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:07,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:30:07,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:30:07,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:30:07,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-12 10:30:07,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 224 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:07,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-12 10:30:07,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:07,936 INFO L129 PetriNetUnfolder]: 96/423 cut-off events. [2022-07-12 10:30:07,937 INFO L130 PetriNetUnfolder]: For 124/125 co-relation queries the response was YES. [2022-07-12 10:30:07,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 423 events. 96/423 cut-off events. For 124/125 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1109 event pairs, 18 based on Foata normal form. 8/413 useless extension candidates. Maximal degree in co-relation 747. Up to 107 conditions per place. [2022-07-12 10:30:07,940 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 24 selfloop transitions, 6 changer transitions 3/233 dead transitions. [2022-07-12 10:30:07,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 599 flow [2022-07-12 10:30:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:30:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:30:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2022-07-12 10:30:07,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8956692913385826 [2022-07-12 10:30:07,943 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2022-07-12 10:30:07,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2022-07-12 10:30:07,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:07,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2022-07-12 10:30:07,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,948 INFO L186 Difference]: Start difference. First operand has 228 places, 224 transitions, 504 flow. Second operand 4 states and 910 transitions. [2022-07-12 10:30:07,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 599 flow [2022-07-12 10:30:07,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 233 transitions, 589 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:30:07,953 INFO L242 Difference]: Finished difference. Result has 230 places, 224 transitions, 510 flow [2022-07-12 10:30:07,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=510, PETRI_PLACES=230, PETRI_TRANSITIONS=224} [2022-07-12 10:30:07,956 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -1 predicate places. [2022-07-12 10:30:07,956 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 224 transitions, 510 flow [2022-07-12 10:30:07,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:07,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:07,957 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:07,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:30:07,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1052780232, now seen corresponding path program 1 times [2022-07-12 10:30:07,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:07,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101631195] [2022-07-12 10:30:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:07,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:30:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101631195] [2022-07-12 10:30:08,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101631195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:08,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:08,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:30:08,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236571656] [2022-07-12 10:30:08,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:08,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:30:08,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:30:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:30:08,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-12 10:30:08,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 224 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:08,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-12 10:30:08,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:08,305 INFO L129 PetriNetUnfolder]: 121/551 cut-off events. [2022-07-12 10:30:08,305 INFO L130 PetriNetUnfolder]: For 162/164 co-relation queries the response was YES. [2022-07-12 10:30:08,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 551 events. 121/551 cut-off events. For 162/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1666 event pairs, 73 based on Foata normal form. 7/530 useless extension candidates. Maximal degree in co-relation 1057. Up to 168 conditions per place. [2022-07-12 10:30:08,308 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 52 selfloop transitions, 8 changer transitions 25/253 dead transitions. [2022-07-12 10:30:08,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 253 transitions, 758 flow [2022-07-12 10:30:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:30:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:30:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1774 transitions. [2022-07-12 10:30:08,313 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7760279965004374 [2022-07-12 10:30:08,313 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1774 transitions. [2022-07-12 10:30:08,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1774 transitions. [2022-07-12 10:30:08,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:08,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1774 transitions. [2022-07-12 10:30:08,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.11111111111111) internal successors, (1774), 9 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,322 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,322 INFO L186 Difference]: Start difference. First operand has 230 places, 224 transitions, 510 flow. Second operand 9 states and 1774 transitions. [2022-07-12 10:30:08,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 253 transitions, 758 flow [2022-07-12 10:30:08,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 253 transitions, 748 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:30:08,328 INFO L242 Difference]: Finished difference. Result has 238 places, 225 transitions, 528 flow [2022-07-12 10:30:08,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=238, PETRI_TRANSITIONS=225} [2022-07-12 10:30:08,330 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-12 10:30:08,330 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 225 transitions, 528 flow [2022-07-12 10:30:08,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:08,331 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:08,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:30:08,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1352398940, now seen corresponding path program 1 times [2022-07-12 10:30:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952956465] [2022-07-12 10:30:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:30:08,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:08,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952956465] [2022-07-12 10:30:08,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952956465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:08,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:08,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:30:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568609360] [2022-07-12 10:30:08,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:08,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:30:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:30:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:30:08,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-12 10:30:08,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 225 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:08,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-12 10:30:08,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:08,619 INFO L129 PetriNetUnfolder]: 101/483 cut-off events. [2022-07-12 10:30:08,620 INFO L130 PetriNetUnfolder]: For 159/161 co-relation queries the response was YES. [2022-07-12 10:30:08,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 483 events. 101/483 cut-off events. For 159/161 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1332 event pairs, 60 based on Foata normal form. 4/465 useless extension candidates. Maximal degree in co-relation 923. Up to 165 conditions per place. [2022-07-12 10:30:08,624 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 55 selfloop transitions, 6 changer transitions 9/238 dead transitions. [2022-07-12 10:30:08,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 238 transitions, 706 flow [2022-07-12 10:30:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:30:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:30:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1382 transitions. [2022-07-12 10:30:08,628 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772778402699663 [2022-07-12 10:30:08,628 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1382 transitions. [2022-07-12 10:30:08,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1382 transitions. [2022-07-12 10:30:08,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:08,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1382 transitions. [2022-07-12 10:30:08,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.42857142857142) internal successors, (1382), 7 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,635 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,635 INFO L186 Difference]: Start difference. First operand has 238 places, 225 transitions, 528 flow. Second operand 7 states and 1382 transitions. [2022-07-12 10:30:08,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 238 transitions, 706 flow [2022-07-12 10:30:08,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 238 transitions, 688 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-12 10:30:08,645 INFO L242 Difference]: Finished difference. Result has 238 places, 226 transitions, 532 flow [2022-07-12 10:30:08,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=532, PETRI_PLACES=238, PETRI_TRANSITIONS=226} [2022-07-12 10:30:08,646 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-12 10:30:08,647 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 226 transitions, 532 flow [2022-07-12 10:30:08,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,648 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:08,648 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:08,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:30:08,649 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash -879290637, now seen corresponding path program 1 times [2022-07-12 10:30:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:08,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342622318] [2022-07-12 10:30:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:08,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:08,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342622318] [2022-07-12 10:30:08,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342622318] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:08,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:08,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:30:08,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830056633] [2022-07-12 10:30:08,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:30:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:30:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:30:08,826 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-12 10:30:08,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 226 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:08,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-12 10:30:08,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:08,900 INFO L129 PetriNetUnfolder]: 52/372 cut-off events. [2022-07-12 10:30:08,900 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2022-07-12 10:30:08,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 372 events. 52/372 cut-off events. For 110/114 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 690 event pairs, 20 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 584. Up to 84 conditions per place. [2022-07-12 10:30:08,903 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 19 selfloop transitions, 6 changer transitions 3/230 dead transitions. [2022-07-12 10:30:08,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 230 transitions, 601 flow [2022-07-12 10:30:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:30:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:30:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2022-07-12 10:30:08,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8963254593175853 [2022-07-12 10:30:08,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2022-07-12 10:30:08,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2022-07-12 10:30:08,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:08,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2022-07-12 10:30:08,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,909 INFO L186 Difference]: Start difference. First operand has 238 places, 226 transitions, 532 flow. Second operand 3 states and 683 transitions. [2022-07-12 10:30:08,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 230 transitions, 601 flow [2022-07-12 10:30:08,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 230 transitions, 589 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-12 10:30:08,915 INFO L242 Difference]: Finished difference. Result has 235 places, 227 transitions, 546 flow [2022-07-12 10:30:08,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=235, PETRI_TRANSITIONS=227} [2022-07-12 10:30:08,916 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 4 predicate places. [2022-07-12 10:30:08,916 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 227 transitions, 546 flow [2022-07-12 10:30:08,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:08,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:08,917 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:08,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:30:08,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1058869021, now seen corresponding path program 1 times [2022-07-12 10:30:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:08,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438435206] [2022-07-12 10:30:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:08,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:09,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438435206] [2022-07-12 10:30:09,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438435206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:09,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:09,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:30:09,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992625243] [2022-07-12 10:30:09,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:09,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:30:09,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:30:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:30:09,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-12 10:30:09,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 227 transitions, 546 flow. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:09,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:09,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-12 10:30:09,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:09,216 INFO L129 PetriNetUnfolder]: 134/666 cut-off events. [2022-07-12 10:30:09,216 INFO L130 PetriNetUnfolder]: For 352/371 co-relation queries the response was YES. [2022-07-12 10:30:09,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 666 events. 134/666 cut-off events. For 352/371 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2551 event pairs, 35 based on Foata normal form. 8/626 useless extension candidates. Maximal degree in co-relation 1220. Up to 100 conditions per place. [2022-07-12 10:30:09,222 INFO L132 encePairwiseOnDemand]: 249/254 looper letters, 35 selfloop transitions, 9 changer transitions 0/249 dead transitions. [2022-07-12 10:30:09,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 249 transitions, 728 flow [2022-07-12 10:30:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:30:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:30:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-12 10:30:09,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-12 10:30:09,225 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-12 10:30:09,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-12 10:30:09,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:09,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-12 10:30:09,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:09,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:09,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:09,231 INFO L186 Difference]: Start difference. First operand has 235 places, 227 transitions, 546 flow. Second operand 4 states and 928 transitions. [2022-07-12 10:30:09,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 249 transitions, 728 flow [2022-07-12 10:30:09,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 249 transitions, 722 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:30:09,237 INFO L242 Difference]: Finished difference. Result has 239 places, 233 transitions, 613 flow [2022-07-12 10:30:09,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=613, PETRI_PLACES=239, PETRI_TRANSITIONS=233} [2022-07-12 10:30:09,238 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 8 predicate places. [2022-07-12 10:30:09,239 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 233 transitions, 613 flow [2022-07-12 10:30:09,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:09,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:09,240 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:09,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:30:09,240 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash 505081247, now seen corresponding path program 1 times [2022-07-12 10:30:09,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:09,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284785479] [2022-07-12 10:30:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:09,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:30:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:09,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284785479] [2022-07-12 10:30:09,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284785479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249006306] [2022-07-12 10:30:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:09,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:09,388 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) [2022-07-12 10:30:09,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:30:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:30:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:30:09,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:30:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:30:10,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249006306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:30:10,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:30:10,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:30:10,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701834351] [2022-07-12 10:30:10,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:30:10,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:30:10,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:30:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:30:10,230 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-12 10:30:10,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 233 transitions, 613 flow. Second operand has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:10,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:10,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-12 10:30:10,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:10,727 INFO L129 PetriNetUnfolder]: 138/847 cut-off events. [2022-07-12 10:30:10,727 INFO L130 PetriNetUnfolder]: For 700/714 co-relation queries the response was YES. [2022-07-12 10:30:10,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 847 events. 138/847 cut-off events. For 700/714 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3213 event pairs, 63 based on Foata normal form. 1/785 useless extension candidates. Maximal degree in co-relation 1700. Up to 246 conditions per place. [2022-07-12 10:30:10,733 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 58 selfloop transitions, 20 changer transitions 41/282 dead transitions. [2022-07-12 10:30:10,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 282 transitions, 1001 flow [2022-07-12 10:30:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 10:30:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-12 10:30:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3217 transitions. [2022-07-12 10:30:10,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7450208429828624 [2022-07-12 10:30:10,741 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3217 transitions. [2022-07-12 10:30:10,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3217 transitions. [2022-07-12 10:30:10,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:10,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3217 transitions. [2022-07-12 10:30:10,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 189.23529411764707) internal successors, (3217), 17 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:10,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:10,769 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:10,770 INFO L186 Difference]: Start difference. First operand has 239 places, 233 transitions, 613 flow. Second operand 17 states and 3217 transitions. [2022-07-12 10:30:10,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 282 transitions, 1001 flow [2022-07-12 10:30:10,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 282 transitions, 977 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-12 10:30:10,776 INFO L242 Difference]: Finished difference. Result has 261 places, 237 transitions, 671 flow [2022-07-12 10:30:10,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=671, PETRI_PLACES=261, PETRI_TRANSITIONS=237} [2022-07-12 10:30:10,778 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 30 predicate places. [2022-07-12 10:30:10,778 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 237 transitions, 671 flow [2022-07-12 10:30:10,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:10,779 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:10,780 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:10,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:30:10,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:30:11,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1762191461, now seen corresponding path program 2 times [2022-07-12 10:30:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:11,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548903539] [2022-07-12 10:30:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:30:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:11,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548903539] [2022-07-12 10:30:11,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548903539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:11,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136280783] [2022-07-12 10:30:11,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:30:11,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:11,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:11,200 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) [2022-07-12 10:30:11,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:30:11,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:30:11,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:30:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 10:30:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:30:11,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:30:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:30:11,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136280783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:30:11,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:30:11,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:30:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426500761] [2022-07-12 10:30:11,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:30:11,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:30:11,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:30:11,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:30:11,955 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-12 10:30:11,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 237 transitions, 671 flow. Second operand has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:11,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:11,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-12 10:30:11,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:12,494 INFO L129 PetriNetUnfolder]: 168/965 cut-off events. [2022-07-12 10:30:12,495 INFO L130 PetriNetUnfolder]: For 825/841 co-relation queries the response was YES. [2022-07-12 10:30:12,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 965 events. 168/965 cut-off events. For 825/841 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4414 event pairs, 70 based on Foata normal form. 39/927 useless extension candidates. Maximal degree in co-relation 1995. Up to 234 conditions per place. [2022-07-12 10:30:12,502 INFO L132 encePairwiseOnDemand]: 236/254 looper letters, 61 selfloop transitions, 21 changer transitions 42/287 dead transitions. [2022-07-12 10:30:12,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 287 transitions, 1135 flow [2022-07-12 10:30:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 10:30:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-12 10:30:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3030 transitions. [2022-07-12 10:30:12,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7455708661417323 [2022-07-12 10:30:12,510 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3030 transitions. [2022-07-12 10:30:12,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3030 transitions. [2022-07-12 10:30:12,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:12,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3030 transitions. [2022-07-12 10:30:12,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 189.375) internal successors, (3030), 16 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:12,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:12,525 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:12,525 INFO L186 Difference]: Start difference. First operand has 261 places, 237 transitions, 671 flow. Second operand 16 states and 3030 transitions. [2022-07-12 10:30:12,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 287 transitions, 1135 flow [2022-07-12 10:30:12,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 287 transitions, 1081 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-12 10:30:12,532 INFO L242 Difference]: Finished difference. Result has 269 places, 241 transitions, 720 flow [2022-07-12 10:30:12,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=720, PETRI_PLACES=269, PETRI_TRANSITIONS=241} [2022-07-12 10:30:12,533 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 38 predicate places. [2022-07-12 10:30:12,533 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 241 transitions, 720 flow [2022-07-12 10:30:12,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:12,534 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:12,535 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:30:12,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:30:12,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 10:30:12,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash 642213491, now seen corresponding path program 3 times [2022-07-12 10:30:12,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:12,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609664661] [2022-07-12 10:30:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:12,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:18,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609664661] [2022-07-12 10:30:18,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609664661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918567171] [2022-07-12 10:30:18,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:30:18,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:18,320 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) [2022-07-12 10:30:18,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:30:18,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:30:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:30:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 10:30:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 10:30:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:30:29,044 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:30:31,163 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (forall ((~client~0.base Int) (~client~0.offset Int)) (let ((.cse7 (select |c_#memory_int| ~client~0.base)) (.cse6 (select (select |c_#memory_int| c_~manager~0.base) (+ c_~manager~0.offset (* c_~manager_back~0 4))))) (or (not (= .cse6 (select .cse7 (+ (* c_~client_back~0 4) ~client~0.offset)))) (= (select .cse7 (+ (* c_~client_front~0 4) ~client~0.offset)) .cse6))))) (.cse0 (forall ((~client~0.base Int) (~client~0.offset Int)) (not (= (select (select |c_#memory_int| c_~manager~0.base) (+ c_~manager~0.offset (* c_~manager_back~0 4))) (select (select |c_#memory_int| ~client~0.base) (+ (* c_~client_back~0 4) ~client~0.offset))))))) (let ((.cse4 (and .cse2 .cse0)) (.cse5 (= (mod c_~safe~0 256) 0))) (and (or (let ((.cse3 (= c_~update~0 (select (select |c_#memory_int| c_~node~0.base) (+ (* c_~node_front~0 4) c_~node~0.offset))))) (and (or (and (or .cse0 (let ((.cse1 (select |c_#memory_int| c_~manager~0.base))) (= (select .cse1 (+ c_~manager~0.offset (* c_~manager_back~0 4))) (select .cse1 (+ (* 4 c_~manager_front~0) c_~manager~0.offset))))) .cse2) (not .cse3)) (or .cse4 .cse3))) .cse5) (or .cse4 (not .cse5))))) is different from false [2022-07-12 10:30:57,586 WARN L233 SmtUtils]: Spent 26.00s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:32:17,842 WARN L233 SmtUtils]: Spent 1.26m on a formula simplification. DAG size of input: 75 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:32:18,028 INFO L356 Elim1Store]: treesize reduction 69, result has 63.5 percent of original size [2022-07-12 10:32:18,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 131 [2022-07-12 10:32:18,335 INFO L356 Elim1Store]: treesize reduction 189, result has 64.5 percent of original size [2022-07-12 10:32:18,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 368 [2022-07-12 10:32:25,794 INFO L356 Elim1Store]: treesize reduction 185, result has 0.5 percent of original size [2022-07-12 10:32:25,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 1 [2022-07-12 10:32:25,838 INFO L356 Elim1Store]: treesize reduction 56, result has 51.3 percent of original size [2022-07-12 10:32:25,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 67 [2022-07-12 10:32:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 1 not checked. [2022-07-12 10:32:26,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918567171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:26,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:26,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 17, 15] total 75 [2022-07-12 10:32:26,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974073770] [2022-07-12 10:32:26,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:26,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-12 10:32:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-12 10:32:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=4940, Unknown=3, NotChecked=144, Total=5550 [2022-07-12 10:32:26,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 254 [2022-07-12 10:32:26,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 241 transitions, 720 flow. Second operand has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:26,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:26,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 254 [2022-07-12 10:32:26,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:44,243 INFO L129 PetriNetUnfolder]: 403/1558 cut-off events. [2022-07-12 10:32:44,243 INFO L130 PetriNetUnfolder]: For 1489/1505 co-relation queries the response was YES. [2022-07-12 10:32:44,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 1558 events. 403/1558 cut-off events. For 1489/1505 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7939 event pairs, 64 based on Foata normal form. 1/1479 useless extension candidates. Maximal degree in co-relation 3789. Up to 524 conditions per place. [2022-07-12 10:32:44,256 INFO L132 encePairwiseOnDemand]: 191/254 looper letters, 249 selfloop transitions, 131 changer transitions 36/504 dead transitions. [2022-07-12 10:32:44,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 504 transitions, 2409 flow [2022-07-12 10:32:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-12 10:32:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2022-07-12 10:32:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 11816 transitions. [2022-07-12 10:32:44,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.41167862866699184 [2022-07-12 10:32:44,279 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 11816 transitions. [2022-07-12 10:32:44,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 11816 transitions. [2022-07-12 10:32:44,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:44,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 11816 transitions. [2022-07-12 10:32:44,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 104.56637168141593) internal successors, (11816), 113 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:44,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:44,364 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:44,365 INFO L186 Difference]: Start difference. First operand has 269 places, 241 transitions, 720 flow. Second operand 113 states and 11816 transitions. [2022-07-12 10:32:44,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 504 transitions, 2409 flow [2022-07-12 10:32:44,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 504 transitions, 2305 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-07-12 10:32:44,379 INFO L242 Difference]: Finished difference. Result has 397 places, 349 transitions, 1528 flow [2022-07-12 10:32:44,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=1528, PETRI_PLACES=397, PETRI_TRANSITIONS=349} [2022-07-12 10:32:44,380 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 166 predicate places. [2022-07-12 10:32:44,381 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 349 transitions, 1528 flow [2022-07-12 10:32:44,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:44,383 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:44,384 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:32:44,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:44,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:44,608 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:32:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:44,609 INFO L85 PathProgramCache]: Analyzing trace with hash 329244297, now seen corresponding path program 4 times [2022-07-12 10:32:44,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:44,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367765890] [2022-07-12 10:32:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:32:44,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:44,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367765890] [2022-07-12 10:32:44,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367765890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:44,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598881359] [2022-07-12 10:32:44,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:32:44,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:44,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:44,771 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) [2022-07-12 10:32:44,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:32:44,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:32:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:44,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 10:32:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:32:45,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:32:45,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598881359] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:45,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:45,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-12 10:32:45,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500157297] [2022-07-12 10:32:45,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:45,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:32:45,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:45,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:32:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:32:45,670 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-12 10:32:45,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 349 transitions, 1528 flow. Second operand has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:45,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:45,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-12 10:32:45,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:46,559 INFO L129 PetriNetUnfolder]: 173/1156 cut-off events. [2022-07-12 10:32:46,559 INFO L130 PetriNetUnfolder]: For 1152/1166 co-relation queries the response was YES. [2022-07-12 10:32:46,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2694 conditions, 1156 events. 173/1156 cut-off events. For 1152/1166 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5223 event pairs, 47 based on Foata normal form. 11/1103 useless extension candidates. Maximal degree in co-relation 2643. Up to 271 conditions per place. [2022-07-12 10:32:46,568 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 73 selfloop transitions, 25 changer transitions 129/390 dead transitions. [2022-07-12 10:32:46,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 390 transitions, 2128 flow [2022-07-12 10:32:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 10:32:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-12 10:32:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4514 transitions. [2022-07-12 10:32:46,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.740485564304462 [2022-07-12 10:32:46,579 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4514 transitions. [2022-07-12 10:32:46,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4514 transitions. [2022-07-12 10:32:46,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:46,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4514 transitions. [2022-07-12 10:32:46,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 188.08333333333334) internal successors, (4514), 24 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:46,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:46,601 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:46,601 INFO L186 Difference]: Start difference. First operand has 397 places, 349 transitions, 1528 flow. Second operand 24 states and 4514 transitions. [2022-07-12 10:32:46,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 390 transitions, 2128 flow [2022-07-12 10:32:46,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 390 transitions, 1979 flow, removed 55 selfloop flow, removed 14 redundant places. [2022-07-12 10:32:46,619 INFO L242 Difference]: Finished difference. Result has 407 places, 256 transitions, 953 flow [2022-07-12 10:32:46,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=953, PETRI_PLACES=407, PETRI_TRANSITIONS=256} [2022-07-12 10:32:46,620 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 176 predicate places. [2022-07-12 10:32:46,620 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 256 transitions, 953 flow [2022-07-12 10:32:46,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:46,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:46,621 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:32:46,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:32:46,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:46,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:32:46,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:46,844 INFO L85 PathProgramCache]: Analyzing trace with hash 60836953, now seen corresponding path program 5 times [2022-07-12 10:32:46,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:46,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980277312] [2022-07-12 10:32:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-12 10:32:47,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:47,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980277312] [2022-07-12 10:32:47,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980277312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:32:47,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:32:47,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:32:47,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879272469] [2022-07-12 10:32:47,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:32:47,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:32:47,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:32:47,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:32:47,024 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-12 10:32:47,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 256 transitions, 953 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:47,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:47,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-12 10:32:47,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:47,332 INFO L129 PetriNetUnfolder]: 337/1352 cut-off events. [2022-07-12 10:32:47,333 INFO L130 PetriNetUnfolder]: For 2093/2109 co-relation queries the response was YES. [2022-07-12 10:32:47,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 1352 events. 337/1352 cut-off events. For 2093/2109 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7135 event pairs, 79 based on Foata normal form. 33/1309 useless extension candidates. Maximal degree in co-relation 3414. Up to 207 conditions per place. [2022-07-12 10:32:47,348 INFO L132 encePairwiseOnDemand]: 251/254 looper letters, 61 selfloop transitions, 6 changer transitions 0/284 dead transitions. [2022-07-12 10:32:47,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 284 transitions, 1280 flow [2022-07-12 10:32:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:32:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:32:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-12 10:32:47,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-12 10:32:47,350 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-12 10:32:47,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-12 10:32:47,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:47,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-12 10:32:47,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:47,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:47,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:47,354 INFO L186 Difference]: Start difference. First operand has 407 places, 256 transitions, 953 flow. Second operand 4 states and 928 transitions. [2022-07-12 10:32:47,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 284 transitions, 1280 flow [2022-07-12 10:32:47,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 284 transitions, 1126 flow, removed 49 selfloop flow, removed 43 redundant places. [2022-07-12 10:32:47,366 INFO L242 Difference]: Finished difference. Result has 278 places, 254 transitions, 830 flow [2022-07-12 10:32:47,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=830, PETRI_PLACES=278, PETRI_TRANSITIONS=254} [2022-07-12 10:32:47,368 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 47 predicate places. [2022-07-12 10:32:47,368 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 254 transitions, 830 flow [2022-07-12 10:32:47,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:47,369 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:47,369 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:32:47,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:32:47,369 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:32:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1601424871, now seen corresponding path program 6 times [2022-07-12 10:32:47,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:47,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018768601] [2022-07-12 10:32:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 10:32:47,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018768601] [2022-07-12 10:32:47,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018768601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273723949] [2022-07-12 10:32:47,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:32:47,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:47,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:47,540 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) [2022-07-12 10:32:47,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:32:47,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 10:32:47,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:32:47,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 10:32:47,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 10:32:48,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273723949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:48,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:48,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-07-12 10:32:48,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408746201] [2022-07-12 10:32:48,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:48,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:32:48,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:48,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:32:48,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:32:48,345 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-12 10:32:48,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 254 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:48,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:48,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-12 10:32:48,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:48,432 INFO L129 PetriNetUnfolder]: 14/351 cut-off events. [2022-07-12 10:32:48,432 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-12 10:32:48,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 351 events. 14/351 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 453 event pairs, 6 based on Foata normal form. 11/353 useless extension candidates. Maximal degree in co-relation 578. Up to 47 conditions per place. [2022-07-12 10:32:48,434 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 23 selfloop transitions, 9 changer transitions 0/246 dead transitions. [2022-07-12 10:32:48,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 246 transitions, 828 flow [2022-07-12 10:32:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:32:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:32:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1338 transitions. [2022-07-12 10:32:48,436 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8779527559055118 [2022-07-12 10:32:48,437 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1338 transitions. [2022-07-12 10:32:48,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1338 transitions. [2022-07-12 10:32:48,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:48,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1338 transitions. [2022-07-12 10:32:48,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:48,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:48,443 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:48,443 INFO L186 Difference]: Start difference. First operand has 278 places, 254 transitions, 830 flow. Second operand 6 states and 1338 transitions. [2022-07-12 10:32:48,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 246 transitions, 828 flow [2022-07-12 10:32:48,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 246 transitions, 777 flow, removed 2 selfloop flow, removed 9 redundant places. [2022-07-12 10:32:48,449 INFO L242 Difference]: Finished difference. Result has 274 places, 244 transitions, 725 flow [2022-07-12 10:32:48,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=274, PETRI_TRANSITIONS=244} [2022-07-12 10:32:48,450 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 43 predicate places. [2022-07-12 10:32:48,450 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 244 transitions, 725 flow [2022-07-12 10:32:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:48,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:48,451 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:32:48,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:48,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 10:32:48,672 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:32:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1127042464, now seen corresponding path program 7 times [2022-07-12 10:32:48,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403637579] [2022-07-12 10:32:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:32:48,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:48,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403637579] [2022-07-12 10:32:48,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403637579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:48,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735106446] [2022-07-12 10:32:48,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:32:48,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:48,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:48,892 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) [2022-07-12 10:32:48,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:32:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:32:49,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 10:32:49,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 10:32:49,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735106446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:49,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:49,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2022-07-12 10:32:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943740744] [2022-07-12 10:32:49,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:49,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:32:49,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:32:49,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:32:49,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 254 [2022-07-12 10:32:49,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 244 transitions, 725 flow. Second operand has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:49,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:49,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 254 [2022-07-12 10:32:49,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:51,055 INFO L129 PetriNetUnfolder]: 34/848 cut-off events. [2022-07-12 10:32:51,057 INFO L130 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2022-07-12 10:32:51,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 848 events. 34/848 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3444 event pairs, 20 based on Foata normal form. 3/804 useless extension candidates. Maximal degree in co-relation 1448. Up to 58 conditions per place. [2022-07-12 10:32:51,062 INFO L132 encePairwiseOnDemand]: 223/254 looper letters, 73 selfloop transitions, 30 changer transitions 113/375 dead transitions. [2022-07-12 10:32:51,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 375 transitions, 1680 flow [2022-07-12 10:32:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 10:32:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-12 10:32:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 10761 transitions. [2022-07-12 10:32:51,083 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7180701988522621 [2022-07-12 10:32:51,084 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 10761 transitions. [2022-07-12 10:32:51,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 10761 transitions. [2022-07-12 10:32:51,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:51,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 10761 transitions. [2022-07-12 10:32:51,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 182.38983050847457) internal successors, (10761), 59 states have internal predecessors, (10761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:51,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:51,129 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:51,131 INFO L186 Difference]: Start difference. First operand has 274 places, 244 transitions, 725 flow. Second operand 59 states and 10761 transitions. [2022-07-12 10:32:51,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 375 transitions, 1680 flow [2022-07-12 10:32:51,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 375 transitions, 1643 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-12 10:32:51,139 INFO L242 Difference]: Finished difference. Result has 359 places, 252 transitions, 898 flow [2022-07-12 10:32:51,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=898, PETRI_PLACES=359, PETRI_TRANSITIONS=252} [2022-07-12 10:32:51,140 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 128 predicate places. [2022-07-12 10:32:51,140 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 252 transitions, 898 flow [2022-07-12 10:32:51,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:51,141 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:51,141 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:32:51,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:51,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 10:32:51,357 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:32:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash -429007627, now seen corresponding path program 8 times [2022-07-12 10:32:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:51,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760233200] [2022-07-12 10:32:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:51,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 10:32:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760233200] [2022-07-12 10:32:51,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760233200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:51,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868744353] [2022-07-12 10:32:51,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:32:51,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:51,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:51,634 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) [2022-07-12 10:32:51,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:32:51,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:32:51,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:32:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 10:32:52,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 10:32:52,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868744353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:52,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:52,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-12 10:32:52,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557206347] [2022-07-12 10:32:52,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:52,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:32:52,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:52,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:32:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:32:52,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 254 [2022-07-12 10:32:52,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 252 transitions, 898 flow. Second operand has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:52,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:52,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 254 [2022-07-12 10:32:52,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:53,202 INFO L129 PetriNetUnfolder]: 21/584 cut-off events. [2022-07-12 10:32:53,203 INFO L130 PetriNetUnfolder]: For 425/425 co-relation queries the response was YES. [2022-07-12 10:32:53,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 584 events. 21/584 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1593 event pairs, 12 based on Foata normal form. 3/560 useless extension candidates. Maximal degree in co-relation 1137. Up to 64 conditions per place. [2022-07-12 10:32:53,208 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 60 selfloop transitions, 40 changer transitions 48/309 dead transitions. [2022-07-12 10:32:53,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 309 transitions, 1503 flow [2022-07-12 10:32:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 10:32:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-12 10:32:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5729 transitions. [2022-07-12 10:32:53,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7275844551689103 [2022-07-12 10:32:53,214 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5729 transitions. [2022-07-12 10:32:53,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5729 transitions. [2022-07-12 10:32:53,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:53,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5729 transitions. [2022-07-12 10:32:53,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 184.80645161290323) internal successors, (5729), 31 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:53,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:53,228 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:53,228 INFO L186 Difference]: Start difference. First operand has 359 places, 252 transitions, 898 flow. Second operand 31 states and 5729 transitions. [2022-07-12 10:32:53,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 309 transitions, 1503 flow [2022-07-12 10:32:53,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 309 transitions, 1310 flow, removed 71 selfloop flow, removed 43 redundant places. [2022-07-12 10:32:53,238 INFO L242 Difference]: Finished difference. Result has 325 places, 256 transitions, 910 flow [2022-07-12 10:32:53,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=910, PETRI_PLACES=325, PETRI_TRANSITIONS=256} [2022-07-12 10:32:53,239 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 94 predicate places. [2022-07-12 10:32:53,239 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 256 transitions, 910 flow [2022-07-12 10:32:53,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:53,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:53,240 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:32:53,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:53,456 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:32:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash -711334493, now seen corresponding path program 9 times [2022-07-12 10:32:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:53,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251495307] [2022-07-12 10:32:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:33:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:01,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:33:01,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251495307] [2022-07-12 10:33:01,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251495307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:33:01,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430807376] [2022-07-12 10:33:01,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:33:01,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:33:01,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:33:01,309 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) [2022-07-12 10:33:01,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:33:01,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 10:33:01,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:33:01,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 179 conjunts are in the unsatisfiable core [2022-07-12 10:33:01,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:33:05,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 10:33:06,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:33:07,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:33:07,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:33:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:33:14,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:33:14,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:33:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:33:14,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:33:14,623 INFO L356 Elim1Store]: treesize reduction 354, result has 31.4 percent of original size [2022-07-12 10:33:14,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 154 treesize of output 193 [2022-07-12 10:33:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 10:33:14,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:33:25,048 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 141 DAG size of output: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:33:37,432 WARN L233 SmtUtils]: Spent 11.64s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:33:54,478 WARN L233 SmtUtils]: Spent 15.55s on a formula simplification. DAG size of input: 142 DAG size of output: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)