./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:55:20,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:55:20,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:55:20,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:55:20,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:55:20,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:55:20,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:55:20,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:55:20,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:55:20,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:55:20,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:55:20,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:55:20,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:55:20,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:55:20,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:55:20,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:55:20,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:55:20,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:55:20,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:55:20,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:55:20,457 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:55:20,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:55:20,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:55:20,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:55:20,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:55:20,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:55:20,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:55:20,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:55:20,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:55:20,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:55:20,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:55:20,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:55:20,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:55:20,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:55:20,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:55:20,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:55:20,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:55:20,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:55:20,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:55:20,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:55:20,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:55:20,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:55:20,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:55:20,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:55:20,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:55:20,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:55:20,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:55:20,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:55:20,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:55:20,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:55:20,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:55:20,507 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:55:20,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:55:20,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:55:20,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:55:20,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:55:20,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:55:20,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:55:20,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:55:20,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:55:20,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:55:20,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:55:20,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:55:20,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:55:20,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:55:20,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:55:20,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:55:20,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:55:20,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:55:20,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:55:20,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:55:20,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:55:20,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:55:20,512 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:55:20,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:55:20,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:55:20,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2022-07-22 21:55:20,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:55:20,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:55:20,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:55:20,776 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:55:20,777 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:55:20,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-22 21:55:20,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f664013dc/4c6cf15fd8b34f95b01ff11a006a8f20/FLAG703dcd3b0 [2022-07-22 21:55:21,180 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:55:21,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-22 21:55:21,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f664013dc/4c6cf15fd8b34f95b01ff11a006a8f20/FLAG703dcd3b0 [2022-07-22 21:55:21,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f664013dc/4c6cf15fd8b34f95b01ff11a006a8f20 [2022-07-22 21:55:21,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:55:21,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:55:21,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:55:21,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:55:21,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:55:21,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd41f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21, skipping insertion in model container [2022-07-22 21:55:21,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:55:21,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:55:21,418 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-07-22 21:55:21,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:55:21,432 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:55:21,460 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-07-22 21:55:21,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:55:21,472 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:55:21,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21 WrapperNode [2022-07-22 21:55:21,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:55:21,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:55:21,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:55:21,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:55:21,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,504 INFO L137 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-07-22 21:55:21,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:55:21,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:55:21,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:55:21,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:55:21,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:55:21,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:55:21,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:55:21,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:55:21,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (1/1) ... [2022-07-22 21:55:21,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:55:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:21,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:55:21,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:55:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:55:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:55:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:55:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:55:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:55:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:55:21,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:55:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-22 21:55:21,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-22 21:55:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:55:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:55:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:55:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:55:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:55:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:55:21,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:55:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:55:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:55:21,588 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:55:21,664 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:55:21,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:55:21,946 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:55:22,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:55:22,059 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:55:22,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:55:22 BoogieIcfgContainer [2022-07-22 21:55:22,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:55:22,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:55:22,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:55:22,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:55:22,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:55:21" (1/3) ... [2022-07-22 21:55:22,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c514579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:55:22, skipping insertion in model container [2022-07-22 21:55:22,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:21" (2/3) ... [2022-07-22 21:55:22,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c514579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:55:22, skipping insertion in model container [2022-07-22 21:55:22,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:55:22" (3/3) ... [2022-07-22 21:55:22,075 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-22 21:55:22,079 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:55:22,086 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:55:22,087 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:55:22,087 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:55:22,172 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:55:22,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 294 flow [2022-07-22 21:55:22,315 INFO L129 PetriNetUnfolder]: 10/127 cut-off events. [2022-07-22 21:55:22,315 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:55:22,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 10/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-07-22 21:55:22,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 294 flow [2022-07-22 21:55:22,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 114 transitions, 252 flow [2022-07-22 21:55:22,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:55:22,350 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@69bd33ce, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b1917cf [2022-07-22 21:55:22,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:55:22,395 INFO L129 PetriNetUnfolder]: 10/113 cut-off events. [2022-07-22 21:55:22,395 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:55:22,395 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:22,396 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] [2022-07-22 21:55:22,397 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 2 more)] === [2022-07-22 21:55:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1136845032, now seen corresponding path program 1 times [2022-07-22 21:55:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:22,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155353166] [2022-07-22 21:55:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:22,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:22,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155353166] [2022-07-22 21:55:22,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155353166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:22,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:22,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:55:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815928804] [2022-07-22 21:55:22,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:22,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:55:22,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:55:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:55:22,692 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 131 [2022-07-22 21:55:22,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:22,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:22,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 131 [2022-07-22 21:55:22,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:22,759 INFO L129 PetriNetUnfolder]: 16/120 cut-off events. [2022-07-22 21:55:22,759 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:55:22,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 120 events. 16/120 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 18/132 useless extension candidates. Maximal degree in co-relation 98. Up to 25 conditions per place. [2022-07-22 21:55:22,762 INFO L132 encePairwiseOnDemand]: 125/131 looper letters, 12 selfloop transitions, 0 changer transitions 2/108 dead transitions. [2022-07-22 21:55:22,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 264 flow [2022-07-22 21:55:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:55:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:55:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2022-07-22 21:55:22,774 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9236641221374046 [2022-07-22 21:55:22,774 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2022-07-22 21:55:22,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2022-07-22 21:55:22,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:22,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2022-07-22 21:55:22,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:22,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:22,789 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:22,791 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 252 flow. Second operand 2 states and 242 transitions. [2022-07-22 21:55:22,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 264 flow [2022-07-22 21:55:22,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:55:22,799 INFO L242 Difference]: Finished difference. Result has 110 places, 106 transitions, 220 flow [2022-07-22 21:55:22,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2022-07-22 21:55:22,807 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2022-07-22 21:55:22,807 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 220 flow [2022-07-22 21:55:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:22,808 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:22,809 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] [2022-07-22 21:55:22,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:55:22,809 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 2 more)] === [2022-07-22 21:55:22,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:22,810 INFO L85 PathProgramCache]: Analyzing trace with hash 274536458, now seen corresponding path program 1 times [2022-07-22 21:55:22,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:22,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012468713] [2022-07-22 21:55:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:23,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:23,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012468713] [2022-07-22 21:55:23,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012468713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:23,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:23,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:55:23,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991128604] [2022-07-22 21:55:23,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:55:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:55:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:55:23,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-07-22 21:55:23,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:23,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-07-22 21:55:23,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:23,198 INFO L129 PetriNetUnfolder]: 23/173 cut-off events. [2022-07-22 21:55:23,198 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:55:23,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 173 events. 23/173 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 233 event pairs, 0 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 231. Up to 36 conditions per place. [2022-07-22 21:55:23,201 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 25 selfloop transitions, 3 changer transitions 5/118 dead transitions. [2022-07-22 21:55:23,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 317 flow [2022-07-22 21:55:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:55:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:55:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2022-07-22 21:55:23,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8259541984732824 [2022-07-22 21:55:23,206 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2022-07-22 21:55:23,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2022-07-22 21:55:23,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:23,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2022-07-22 21:55:23,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,213 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,213 INFO L186 Difference]: Start difference. First operand has 110 places, 106 transitions, 220 flow. Second operand 5 states and 541 transitions. [2022-07-22 21:55:23,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 317 flow [2022-07-22 21:55:23,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 317 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:55:23,218 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 247 flow [2022-07-22 21:55:23,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2022-07-22 21:55:23,219 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -2 predicate places. [2022-07-22 21:55:23,220 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 247 flow [2022-07-22 21:55:23,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,220 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:23,221 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] [2022-07-22 21:55:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:55:23,221 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 2 more)] === [2022-07-22 21:55:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -575216244, now seen corresponding path program 1 times [2022-07-22 21:55:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:23,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044205523] [2022-07-22 21:55:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:23,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:23,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044205523] [2022-07-22 21:55:23,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044205523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646349739] [2022-07-22 21:55:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:23,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:23,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:23,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:55:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:23,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:55:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:24,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:55:24,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646349739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:24,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:55:24,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-22 21:55:24,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999866108] [2022-07-22 21:55:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:24,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:55:24,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:55:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:55:24,033 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-22 21:55:24,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 247 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 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) [2022-07-22 21:55:24,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:24,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-22 21:55:24,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:24,360 INFO L129 PetriNetUnfolder]: 270/677 cut-off events. [2022-07-22 21:55:24,360 INFO L130 PetriNetUnfolder]: For 152/167 co-relation queries the response was YES. [2022-07-22 21:55:24,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 677 events. 270/677 cut-off events. For 152/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2947 event pairs, 86 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1376. Up to 179 conditions per place. [2022-07-22 21:55:24,368 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 56 selfloop transitions, 12 changer transitions 0/144 dead transitions. [2022-07-22 21:55:24,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 497 flow [2022-07-22 21:55:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:55:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:55:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 986 transitions. [2022-07-22 21:55:24,371 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7526717557251908 [2022-07-22 21:55:24,371 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 986 transitions. [2022-07-22 21:55:24,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 986 transitions. [2022-07-22 21:55:24,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:24,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 986 transitions. [2022-07-22 21:55:24,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:24,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:24,377 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:24,377 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 247 flow. Second operand 10 states and 986 transitions. [2022-07-22 21:55:24,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 497 flow [2022-07-22 21:55:24,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 144 transitions, 481 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-22 21:55:24,382 INFO L242 Difference]: Finished difference. Result has 121 places, 115 transitions, 301 flow [2022-07-22 21:55:24,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2022-07-22 21:55:24,384 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 4 predicate places. [2022-07-22 21:55:24,384 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 301 flow [2022-07-22 21:55:24,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 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) [2022-07-22 21:55:24,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:24,385 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] [2022-07-22 21:55:24,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:24,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:24,599 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 2 more)] === [2022-07-22 21:55:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1981692516, now seen corresponding path program 2 times [2022-07-22 21:55:24,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:24,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009371691] [2022-07-22 21:55:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:24,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:24,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009371691] [2022-07-22 21:55:24,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009371691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082456445] [2022-07-22 21:55:24,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:24,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:24,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:24,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:55:24,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:24,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:55:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:25,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:55:25,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082456445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:25,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:55:25,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-22 21:55:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901444501] [2022-07-22 21:55:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:55:25,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:55:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:55:25,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-22 21:55:25,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 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) [2022-07-22 21:55:25,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:25,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-22 21:55:25,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:25,448 INFO L129 PetriNetUnfolder]: 241/544 cut-off events. [2022-07-22 21:55:25,448 INFO L130 PetriNetUnfolder]: For 205/217 co-relation queries the response was YES. [2022-07-22 21:55:25,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 544 events. 241/544 cut-off events. For 205/217 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2014 event pairs, 59 based on Foata normal form. 5/489 useless extension candidates. Maximal degree in co-relation 1235. Up to 169 conditions per place. [2022-07-22 21:55:25,453 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 47 selfloop transitions, 12 changer transitions 0/135 dead transitions. [2022-07-22 21:55:25,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 480 flow [2022-07-22 21:55:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:55:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:55:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-07-22 21:55:25,455 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7442748091603053 [2022-07-22 21:55:25,455 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-07-22 21:55:25,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-07-22 21:55:25,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:25,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-07-22 21:55:25,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:25,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:25,461 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:25,461 INFO L186 Difference]: Start difference. First operand has 121 places, 115 transitions, 301 flow. Second operand 10 states and 975 transitions. [2022-07-22 21:55:25,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 135 transitions, 480 flow [2022-07-22 21:55:25,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 135 transitions, 473 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:25,465 INFO L242 Difference]: Finished difference. Result has 127 places, 114 transitions, 323 flow [2022-07-22 21:55:25,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2022-07-22 21:55:25,465 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 10 predicate places. [2022-07-22 21:55:25,466 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 323 flow [2022-07-22 21:55:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 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) [2022-07-22 21:55:25,466 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:25,466 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] [2022-07-22 21:55:25,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:55:25,679 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,SelfDestructingSolverStorable3 [2022-07-22 21:55:25,680 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 2 more)] === [2022-07-22 21:55:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1358218546, now seen corresponding path program 1 times [2022-07-22 21:55:25,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:25,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176233303] [2022-07-22 21:55:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:25,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:25,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176233303] [2022-07-22 21:55:25,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176233303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:25,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:25,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:55:25,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936965175] [2022-07-22 21:55:25,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:25,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:55:25,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:55:25,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:55:25,848 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-22 21:55:25,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:25,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:25,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-22 21:55:25,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:26,331 INFO L129 PetriNetUnfolder]: 1833/3130 cut-off events. [2022-07-22 21:55:26,331 INFO L130 PetriNetUnfolder]: For 1785/1842 co-relation queries the response was YES. [2022-07-22 21:55:26,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 3130 events. 1833/3130 cut-off events. For 1785/1842 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18033 event pairs, 320 based on Foata normal form. 13/2625 useless extension candidates. Maximal degree in co-relation 7653. Up to 1083 conditions per place. [2022-07-22 21:55:26,356 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 83 selfloop transitions, 10 changer transitions 2/163 dead transitions. [2022-07-22 21:55:26,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 163 transitions, 682 flow [2022-07-22 21:55:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:55:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:55:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2022-07-22 21:55:26,359 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.726145038167939 [2022-07-22 21:55:26,359 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 761 transitions. [2022-07-22 21:55:26,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 761 transitions. [2022-07-22 21:55:26,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:26,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 761 transitions. [2022-07-22 21:55:26,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:26,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:26,364 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:26,365 INFO L186 Difference]: Start difference. First operand has 127 places, 114 transitions, 323 flow. Second operand 8 states and 761 transitions. [2022-07-22 21:55:26,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 163 transitions, 682 flow [2022-07-22 21:55:26,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 163 transitions, 660 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-07-22 21:55:26,381 INFO L242 Difference]: Finished difference. Result has 130 places, 117 transitions, 357 flow [2022-07-22 21:55:26,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=357, PETRI_PLACES=130, PETRI_TRANSITIONS=117} [2022-07-22 21:55:26,383 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2022-07-22 21:55:26,383 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 117 transitions, 357 flow [2022-07-22 21:55:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:26,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:26,384 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] [2022-07-22 21:55:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:55:26,385 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 2 more)] === [2022-07-22 21:55:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1386724926, now seen corresponding path program 2 times [2022-07-22 21:55:26,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:26,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045134556] [2022-07-22 21:55:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:26,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:26,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:26,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045134556] [2022-07-22 21:55:26,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045134556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:26,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:26,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:55:26,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155332989] [2022-07-22 21:55:26,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:55:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:55:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:55:26,634 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-22 21:55:26,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 117 transitions, 357 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:26,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:26,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-22 21:55:26,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:27,229 INFO L129 PetriNetUnfolder]: 1914/3550 cut-off events. [2022-07-22 21:55:27,229 INFO L130 PetriNetUnfolder]: For 3151/3197 co-relation queries the response was YES. [2022-07-22 21:55:27,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8896 conditions, 3550 events. 1914/3550 cut-off events. For 3151/3197 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22689 event pairs, 721 based on Foata normal form. 32/3203 useless extension candidates. Maximal degree in co-relation 8884. Up to 1069 conditions per place. [2022-07-22 21:55:27,256 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 92 selfloop transitions, 12 changer transitions 10/182 dead transitions. [2022-07-22 21:55:27,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 824 flow [2022-07-22 21:55:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:55:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:55:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 946 transitions. [2022-07-22 21:55:27,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7221374045801526 [2022-07-22 21:55:27,260 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 946 transitions. [2022-07-22 21:55:27,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 946 transitions. [2022-07-22 21:55:27,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:27,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 946 transitions. [2022-07-22 21:55:27,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.6) internal successors, (946), 10 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,265 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,265 INFO L186 Difference]: Start difference. First operand has 130 places, 117 transitions, 357 flow. Second operand 10 states and 946 transitions. [2022-07-22 21:55:27,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 824 flow [2022-07-22 21:55:27,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 810 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:55:27,274 INFO L242 Difference]: Finished difference. Result has 136 places, 119 transitions, 390 flow [2022-07-22 21:55:27,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=136, PETRI_TRANSITIONS=119} [2022-07-22 21:55:27,306 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2022-07-22 21:55:27,306 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 119 transitions, 390 flow [2022-07-22 21:55:27,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:27,307 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] [2022-07-22 21:55:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:55:27,307 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 2 more)] === [2022-07-22 21:55:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1632214562, now seen corresponding path program 3 times [2022-07-22 21:55:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:27,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863110606] [2022-07-22 21:55:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:27,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:27,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863110606] [2022-07-22 21:55:27,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863110606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:27,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:27,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:55:27,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584720173] [2022-07-22 21:55:27,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:55:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:55:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:55:27,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-22 21:55:27,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 119 transitions, 390 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:27,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-22 21:55:27,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:27,917 INFO L129 PetriNetUnfolder]: 1433/2624 cut-off events. [2022-07-22 21:55:27,917 INFO L130 PetriNetUnfolder]: For 2756/2756 co-relation queries the response was YES. [2022-07-22 21:55:27,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7160 conditions, 2624 events. 1433/2624 cut-off events. For 2756/2756 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15541 event pairs, 314 based on Foata normal form. 72/2444 useless extension candidates. Maximal degree in co-relation 7146. Up to 1319 conditions per place. [2022-07-22 21:55:27,941 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 63 selfloop transitions, 11 changer transitions 9/151 dead transitions. [2022-07-22 21:55:27,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 151 transitions, 674 flow [2022-07-22 21:55:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:55:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:55:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 834 transitions. [2022-07-22 21:55:27,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7073791348600509 [2022-07-22 21:55:27,944 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 834 transitions. [2022-07-22 21:55:27,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 834 transitions. [2022-07-22 21:55:27,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:27,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 834 transitions. [2022-07-22 21:55:27,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.66666666666667) internal successors, (834), 9 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,949 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,949 INFO L186 Difference]: Start difference. First operand has 136 places, 119 transitions, 390 flow. Second operand 9 states and 834 transitions. [2022-07-22 21:55:27,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 151 transitions, 674 flow [2022-07-22 21:55:27,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 151 transitions, 653 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-07-22 21:55:27,956 INFO L242 Difference]: Finished difference. Result has 138 places, 116 transitions, 373 flow [2022-07-22 21:55:27,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=138, PETRI_TRANSITIONS=116} [2022-07-22 21:55:27,957 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2022-07-22 21:55:27,958 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 116 transitions, 373 flow [2022-07-22 21:55:27,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:27,958 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:27,958 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] [2022-07-22 21:55:27,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:55:27,959 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 2 more)] === [2022-07-22 21:55:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash -381570272, now seen corresponding path program 1 times [2022-07-22 21:55:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:27,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677642451] [2022-07-22 21:55:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677642451] [2022-07-22 21:55:28,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677642451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526687148] [2022-07-22 21:55:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:28,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:28,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:28,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:55:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:28,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:55:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:28,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:28,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526687148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:28,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:28,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-07-22 21:55:28,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24232477] [2022-07-22 21:55:28,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:28,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 21:55:28,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 21:55:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:55:28,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-07-22 21:55:28,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 116 transitions, 373 flow. Second operand has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:28,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:28,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-07-22 21:55:28,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:29,627 INFO L129 PetriNetUnfolder]: 4250/7066 cut-off events. [2022-07-22 21:55:29,627 INFO L130 PetriNetUnfolder]: For 8476/8523 co-relation queries the response was YES. [2022-07-22 21:55:29,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19721 conditions, 7066 events. 4250/7066 cut-off events. For 8476/8523 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47320 event pairs, 526 based on Foata normal form. 554/7022 useless extension candidates. Maximal degree in co-relation 19706. Up to 1749 conditions per place. [2022-07-22 21:55:29,700 INFO L132 encePairwiseOnDemand]: 115/131 looper letters, 145 selfloop transitions, 34 changer transitions 8/254 dead transitions. [2022-07-22 21:55:29,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 254 transitions, 1293 flow [2022-07-22 21:55:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:55:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:55:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1598 transitions. [2022-07-22 21:55:29,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7175572519083969 [2022-07-22 21:55:29,705 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1598 transitions. [2022-07-22 21:55:29,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1598 transitions. [2022-07-22 21:55:29,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:29,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1598 transitions. [2022-07-22 21:55:29,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.0) internal successors, (1598), 17 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 131.0) internal successors, (2358), 18 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,714 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 131.0) internal successors, (2358), 18 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,714 INFO L186 Difference]: Start difference. First operand has 138 places, 116 transitions, 373 flow. Second operand 17 states and 1598 transitions. [2022-07-22 21:55:29,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 254 transitions, 1293 flow [2022-07-22 21:55:29,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 254 transitions, 1217 flow, removed 15 selfloop flow, removed 11 redundant places. [2022-07-22 21:55:29,730 INFO L242 Difference]: Finished difference. Result has 150 places, 139 transitions, 628 flow [2022-07-22 21:55:29,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=628, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2022-07-22 21:55:29,732 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 33 predicate places. [2022-07-22 21:55:29,732 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 628 flow [2022-07-22 21:55:29,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:29,733 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] [2022-07-22 21:55:29,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:29,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:29,960 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 2 more)] === [2022-07-22 21:55:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1954215548, now seen corresponding path program 1 times [2022-07-22 21:55:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:29,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405730928] [2022-07-22 21:55:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:30,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:30,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405730928] [2022-07-22 21:55:30,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405730928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:30,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918339866] [2022-07-22 21:55:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:30,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:30,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:30,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:30,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:55:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:55:30,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:30,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:55:30,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918339866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:30,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:55:30,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-22 21:55:30,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484832760] [2022-07-22 21:55:30,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:30,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:55:30,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:55:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:55:30,562 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-22 21:55:30,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 628 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:30,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:30,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-22 21:55:30,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:31,106 INFO L129 PetriNetUnfolder]: 1788/3775 cut-off events. [2022-07-22 21:55:31,106 INFO L130 PetriNetUnfolder]: For 13246/13426 co-relation queries the response was YES. [2022-07-22 21:55:31,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13082 conditions, 3775 events. 1788/3775 cut-off events. For 13246/13426 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28604 event pairs, 233 based on Foata normal form. 7/3446 useless extension candidates. Maximal degree in co-relation 13060. Up to 1351 conditions per place. [2022-07-22 21:55:31,147 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 108 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2022-07-22 21:55:31,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 1358 flow [2022-07-22 21:55:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:55:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:55:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 883 transitions. [2022-07-22 21:55:31,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7489397794741306 [2022-07-22 21:55:31,151 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 883 transitions. [2022-07-22 21:55:31,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 883 transitions. [2022-07-22 21:55:31,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:31,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 883 transitions. [2022-07-22 21:55:31,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.11111111111111) internal successors, (883), 9 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:31,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:31,156 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:31,156 INFO L186 Difference]: Start difference. First operand has 150 places, 139 transitions, 628 flow. Second operand 9 states and 883 transitions. [2022-07-22 21:55:31,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 1358 flow [2022-07-22 21:55:31,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 202 transitions, 1188 flow, removed 66 selfloop flow, removed 11 redundant places. [2022-07-22 21:55:31,176 INFO L242 Difference]: Finished difference. Result has 147 places, 149 transitions, 670 flow [2022-07-22 21:55:31,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=147, PETRI_TRANSITIONS=149} [2022-07-22 21:55:31,177 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 30 predicate places. [2022-07-22 21:55:31,178 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 149 transitions, 670 flow [2022-07-22 21:55:31,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:31,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:31,178 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] [2022-07-22 21:55:31,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:31,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:31,395 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 2 more)] === [2022-07-22 21:55:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2147113502, now seen corresponding path program 2 times [2022-07-22 21:55:31,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781974093] [2022-07-22 21:55:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:31,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:55:31,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781974093] [2022-07-22 21:55:31,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781974093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:31,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652469696] [2022-07-22 21:55:31,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:31,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:31,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:31,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:31,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:55:31,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:31,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:31,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:55:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:55:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:55:32,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652469696] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:32,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:55:32,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 22 [2022-07-22 21:55:32,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540657428] [2022-07-22 21:55:32,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:32,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:55:32,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:55:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:55:32,175 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-22 21:55:32,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 149 transitions, 670 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:32,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:32,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-22 21:55:32,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:32,895 INFO L129 PetriNetUnfolder]: 2488/5379 cut-off events. [2022-07-22 21:55:32,895 INFO L130 PetriNetUnfolder]: For 21866/22027 co-relation queries the response was YES. [2022-07-22 21:55:32,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 5379 events. 2488/5379 cut-off events. For 21866/22027 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42815 event pairs, 354 based on Foata normal form. 26/5220 useless extension candidates. Maximal degree in co-relation 19279. Up to 1207 conditions per place. [2022-07-22 21:55:32,965 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 156 selfloop transitions, 24 changer transitions 0/258 dead transitions. [2022-07-22 21:55:32,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 258 transitions, 1780 flow [2022-07-22 21:55:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:55:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:55:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 994 transitions. [2022-07-22 21:55:32,969 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587786259541984 [2022-07-22 21:55:32,969 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 994 transitions. [2022-07-22 21:55:32,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 994 transitions. [2022-07-22 21:55:32,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:32,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 994 transitions. [2022-07-22 21:55:32,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:32,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:32,975 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:32,975 INFO L186 Difference]: Start difference. First operand has 147 places, 149 transitions, 670 flow. Second operand 10 states and 994 transitions. [2022-07-22 21:55:32,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 258 transitions, 1780 flow [2022-07-22 21:55:32,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 258 transitions, 1767 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:32,996 INFO L242 Difference]: Finished difference. Result has 155 places, 156 transitions, 779 flow [2022-07-22 21:55:32,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=155, PETRI_TRANSITIONS=156} [2022-07-22 21:55:32,998 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 38 predicate places. [2022-07-22 21:55:32,998 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 156 transitions, 779 flow [2022-07-22 21:55:32,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:32,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:32,999 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:33,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:33,215 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,SelfDestructingSolverStorable9 [2022-07-22 21:55:33,215 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 2 more)] === [2022-07-22 21:55:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash -562275662, now seen corresponding path program 3 times [2022-07-22 21:55:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230604359] [2022-07-22 21:55:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:33,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:33,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:33,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230604359] [2022-07-22 21:55:33,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230604359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:33,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:33,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:55:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647467076] [2022-07-22 21:55:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:33,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:55:33,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:55:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:55:33,402 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-22 21:55:33,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 156 transitions, 779 flow. Second operand has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:33,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:33,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-22 21:55:33,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:34,653 INFO L129 PetriNetUnfolder]: 6731/11642 cut-off events. [2022-07-22 21:55:34,653 INFO L130 PetriNetUnfolder]: For 39293/39293 co-relation queries the response was YES. [2022-07-22 21:55:34,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43407 conditions, 11642 events. 6731/11642 cut-off events. For 39293/39293 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 86834 event pairs, 2836 based on Foata normal form. 43/11558 useless extension candidates. Maximal degree in co-relation 43383. Up to 7480 conditions per place. [2022-07-22 21:55:34,839 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 103 selfloop transitions, 18 changer transitions 15/204 dead transitions. [2022-07-22 21:55:34,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 204 transitions, 1467 flow [2022-07-22 21:55:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:55:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:55:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 910 transitions. [2022-07-22 21:55:34,842 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6946564885496184 [2022-07-22 21:55:34,842 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 910 transitions. [2022-07-22 21:55:34,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 910 transitions. [2022-07-22 21:55:34,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:34,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 910 transitions. [2022-07-22 21:55:34,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.0) internal successors, (910), 10 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) [2022-07-22 21:55:34,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:34,847 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:34,847 INFO L186 Difference]: Start difference. First operand has 155 places, 156 transitions, 779 flow. Second operand 10 states and 910 transitions. [2022-07-22 21:55:34,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 204 transitions, 1467 flow [2022-07-22 21:55:34,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 1435 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-07-22 21:55:34,919 INFO L242 Difference]: Finished difference. Result has 159 places, 159 transitions, 859 flow [2022-07-22 21:55:34,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=859, PETRI_PLACES=159, PETRI_TRANSITIONS=159} [2022-07-22 21:55:34,920 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 42 predicate places. [2022-07-22 21:55:34,920 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 159 transitions, 859 flow [2022-07-22 21:55:34,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:34,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:34,921 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:34,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:55:34,921 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 2 more)] === [2022-07-22 21:55:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1797479770, now seen corresponding path program 1 times [2022-07-22 21:55:34,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:34,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768447556] [2022-07-22 21:55:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:34,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:35,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:35,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768447556] [2022-07-22 21:55:35,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768447556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:35,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138349007] [2022-07-22 21:55:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:35,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:35,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:35,009 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:35,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:55:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 21:55:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:35,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:35,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138349007] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:35,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:35,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-07-22 21:55:35,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348408889] [2022-07-22 21:55:35,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:35,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:55:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:55:35,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:55:35,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-07-22 21:55:35,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 159 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:35,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:35,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-07-22 21:55:35,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:36,071 INFO L129 PetriNetUnfolder]: 1565/4801 cut-off events. [2022-07-22 21:55:36,072 INFO L130 PetriNetUnfolder]: For 31934/32370 co-relation queries the response was YES. [2022-07-22 21:55:36,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17842 conditions, 4801 events. 1565/4801 cut-off events. For 31934/32370 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46180 event pairs, 216 based on Foata normal form. 174/4821 useless extension candidates. Maximal degree in co-relation 17817. Up to 1194 conditions per place. [2022-07-22 21:55:36,124 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 59 selfloop transitions, 67 changer transitions 4/226 dead transitions. [2022-07-22 21:55:36,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 226 transitions, 1637 flow [2022-07-22 21:55:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:55:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:55:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-07-22 21:55:36,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8429661941112323 [2022-07-22 21:55:36,128 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-07-22 21:55:36,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-07-22 21:55:36,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:36,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-07-22 21:55:36,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:36,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:36,133 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:36,133 INFO L186 Difference]: Start difference. First operand has 159 places, 159 transitions, 859 flow. Second operand 7 states and 773 transitions. [2022-07-22 21:55:36,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 226 transitions, 1637 flow [2022-07-22 21:55:36,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 1607 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-22 21:55:36,155 INFO L242 Difference]: Finished difference. Result has 161 places, 194 transitions, 1493 flow [2022-07-22 21:55:36,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1493, PETRI_PLACES=161, PETRI_TRANSITIONS=194} [2022-07-22 21:55:36,156 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 44 predicate places. [2022-07-22 21:55:36,156 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 194 transitions, 1493 flow [2022-07-22 21:55:36,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:36,157 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:36,157 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:55:36,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:36,380 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 2 more)] === [2022-07-22 21:55:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1189485944, now seen corresponding path program 2 times [2022-07-22 21:55:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333995285] [2022-07-22 21:55:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:36,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:36,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333995285] [2022-07-22 21:55:36,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333995285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168065339] [2022-07-22 21:55:36,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:36,547 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:36,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:55:36,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:36,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:55:36,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:36,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:37,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168065339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:37,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:37,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-22 21:55:37,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007162327] [2022-07-22 21:55:37,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:37,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:55:37,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:55:37,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:55:37,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-22 21:55:37,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 194 transitions, 1493 flow. Second operand has 24 states, 24 states have (on average 87.83333333333333) internal successors, (2108), 24 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:37,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:37,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-22 21:55:37,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:45,432 INFO L129 PetriNetUnfolder]: 40001/70006 cut-off events. [2022-07-22 21:55:45,432 INFO L130 PetriNetUnfolder]: For 398299/398495 co-relation queries the response was YES. [2022-07-22 21:55:45,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285840 conditions, 70006 events. 40001/70006 cut-off events. For 398299/398495 co-relation queries the response was YES. Maximal size of possible extension queue 4215. Compared 693294 event pairs, 7304 based on Foata normal form. 3125/72302 useless extension candidates. Maximal degree in co-relation 285812. Up to 11334 conditions per place. [2022-07-22 21:55:46,225 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 642 selfloop transitions, 150 changer transitions 0/860 dead transitions. [2022-07-22 21:55:46,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 860 transitions, 10217 flow [2022-07-22 21:55:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:55:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:55:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2303 transitions. [2022-07-22 21:55:46,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7325063613231552 [2022-07-22 21:55:46,230 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2303 transitions. [2022-07-22 21:55:46,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2303 transitions. [2022-07-22 21:55:46,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:46,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2303 transitions. [2022-07-22 21:55:46,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 95.95833333333333) internal successors, (2303), 24 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:46,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:46,241 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:46,242 INFO L186 Difference]: Start difference. First operand has 161 places, 194 transitions, 1493 flow. Second operand 24 states and 2303 transitions. [2022-07-22 21:55:46,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 860 transitions, 10217 flow [2022-07-22 21:55:47,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 860 transitions, 9232 flow, removed 481 selfloop flow, removed 3 redundant places. [2022-07-22 21:55:47,097 INFO L242 Difference]: Finished difference. Result has 194 places, 308 transitions, 3242 flow [2022-07-22 21:55:47,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3242, PETRI_PLACES=194, PETRI_TRANSITIONS=308} [2022-07-22 21:55:47,098 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 77 predicate places. [2022-07-22 21:55:47,099 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 308 transitions, 3242 flow [2022-07-22 21:55:47,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.83333333333333) internal successors, (2108), 24 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:47,100 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:47,100 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:55:47,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:47,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:47,323 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 2 more)] === [2022-07-22 21:55:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1361124138, now seen corresponding path program 3 times [2022-07-22 21:55:47,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:47,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921606472] [2022-07-22 21:55:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:47,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:47,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921606472] [2022-07-22 21:55:47,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921606472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391280108] [2022-07-22 21:55:47,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:55:47,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:47,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:47,467 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:47,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:55:47,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:55:47,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:55:47,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:48,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:48,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391280108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:48,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:48,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-22 21:55:48,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699523610] [2022-07-22 21:55:48,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:55:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:55:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:55:48,341 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-07-22 21:55:48,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 308 transitions, 3242 flow. Second operand has 24 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:48,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:48,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-07-22 21:55:48,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:06,604 INFO L129 PetriNetUnfolder]: 69409/129093 cut-off events. [2022-07-22 21:56:06,605 INFO L130 PetriNetUnfolder]: For 1018414/1018732 co-relation queries the response was YES. [2022-07-22 21:56:07,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603712 conditions, 129093 events. 69409/129093 cut-off events. For 1018414/1018732 co-relation queries the response was YES. Maximal size of possible extension queue 8302. Compared 1477313 event pairs, 8765 based on Foata normal form. 1799/129602 useless extension candidates. Maximal degree in co-relation 603671. Up to 17861 conditions per place. [2022-07-22 21:56:08,358 INFO L132 encePairwiseOnDemand]: 114/131 looper letters, 1018 selfloop transitions, 545 changer transitions 78/1708 dead transitions. [2022-07-22 21:56:08,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1708 transitions, 23713 flow [2022-07-22 21:56:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 21:56:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-22 21:56:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4288 transitions. [2022-07-22 21:56:08,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.711583139727846 [2022-07-22 21:56:08,365 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4288 transitions. [2022-07-22 21:56:08,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4288 transitions. [2022-07-22 21:56:08,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:08,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4288 transitions. [2022-07-22 21:56:08,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 93.21739130434783) internal successors, (4288), 46 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:08,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:08,381 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:08,381 INFO L186 Difference]: Start difference. First operand has 194 places, 308 transitions, 3242 flow. Second operand 46 states and 4288 transitions. [2022-07-22 21:56:08,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1708 transitions, 23713 flow [2022-07-22 21:56:14,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1708 transitions, 23019 flow, removed 321 selfloop flow, removed 6 redundant places. [2022-07-22 21:56:14,745 INFO L242 Difference]: Finished difference. Result has 254 places, 808 transitions, 11585 flow [2022-07-22 21:56:14,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=11585, PETRI_PLACES=254, PETRI_TRANSITIONS=808} [2022-07-22 21:56:14,745 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 137 predicate places. [2022-07-22 21:56:14,746 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 808 transitions, 11585 flow [2022-07-22 21:56:14,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:14,746 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:14,747 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:56:14,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 21:56:14,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:56:14,964 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 2 more)] === [2022-07-22 21:56:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1843996306, now seen corresponding path program 4 times [2022-07-22 21:56:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:14,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391090599] [2022-07-22 21:56:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:15,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391090599] [2022-07-22 21:56:15,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391090599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:15,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621518252] [2022-07-22 21:56:15,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:56:15,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:15,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:15,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:56:15,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:56:15,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:56:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:56:15,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:15,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:15,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621518252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:15,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:15,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-22 21:56:15,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191752429] [2022-07-22 21:56:15,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:15,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:56:15,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:15,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:56:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:56:15,677 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-22 21:56:15,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 808 transitions, 11585 flow. Second operand has 24 states, 24 states have (on average 87.5) internal successors, (2100), 24 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:15,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:15,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-22 21:56:15,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand