./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/bench-exp3x3-opt.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 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:37:13,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:37:13,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:37:13,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:37:13,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:37:13,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:37:13,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:37:13,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:37:13,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:37:13,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:37:13,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:37:13,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:37:13,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:37:13,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:37:13,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:37:13,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:37:13,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:37:13,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:37:13,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:37:13,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:37:13,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:37:13,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:37:13,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:37:13,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:37:13,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:37:13,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:37:13,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:37:13,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:37:13,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:37:13,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:37:13,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:37:13,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:37:13,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:37:13,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:37:13,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:37:13,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:37:13,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:37:13,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:37:13,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:37:13,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:37:13,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:37:13,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:37:13,469 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:37:13,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:37:13,471 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:37:13,471 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:37:13,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:37:13,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:37:13,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:37:13,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:37:13,473 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:37:13,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:37:13,474 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:37:13,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:37:13,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:37:13,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:37:13,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:37:13,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:37:13,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:37:13,475 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:37:13,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:37:13,475 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:37:13,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:37:13,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:37:13,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:37:13,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:37:13,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:37:13,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:37:13,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:37:13,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:37:13,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:37:13,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:37:13,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:37:13,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:37:13,478 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:37:13,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:37:13,479 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:37:13,479 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:37:13,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:37:13,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:37:13,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:37:13,808 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:37:13,808 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:37:13,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c [2023-09-01 11:37:14,924 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:37:15,076 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:37:15,077 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c [2023-09-01 11:37:15,089 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deaee870d/0868711287f2409f98eddb84109a0f67/FLAG1b9340a96 [2023-09-01 11:37:15,101 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deaee870d/0868711287f2409f98eddb84109a0f67 [2023-09-01 11:37:15,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:37:15,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:37:15,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:37:15,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:37:15,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:37:15,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62734427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15, skipping insertion in model container [2023-09-01 11:37:15,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:37:15,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:37:15,326 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2023-09-01 11:37:15,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:37:15,346 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:37:15,385 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2023-09-01 11:37:15,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:37:15,406 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:37:15,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15 WrapperNode [2023-09-01 11:37:15,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:37:15,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:37:15,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:37:15,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:37:15,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,461 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2023-09-01 11:37:15,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:37:15,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:37:15,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:37:15,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:37:15,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,505 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:37:15,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:37:15,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:37:15,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:37:15,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (1/1) ... [2023-09-01 11:37:15,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:37:15,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:15,546 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) [2023-09-01 11:37:15,573 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 [2023-09-01 11:37:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:37:15,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:37:15,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:37:15,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:37:15,582 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:37:15,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:37:15,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:37:15,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:37:15,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 11:37:15,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 11:37:15,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 11:37:15,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 11:37:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:37:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 11:37:15,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 11:37:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 11:37:15,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 11:37:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:37:15,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:37:15,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:37:15,586 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:37:15,683 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:37:15,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:37:15,973 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:37:15,981 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:37:15,981 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 11:37:15,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:37:15 BoogieIcfgContainer [2023-09-01 11:37:15,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:37:15,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:37:15,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:37:15,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:37:15,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:37:15" (1/3) ... [2023-09-01 11:37:15,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714943f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:37:15, skipping insertion in model container [2023-09-01 11:37:15,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:37:15" (2/3) ... [2023-09-01 11:37:15,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714943f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:37:15, skipping insertion in model container [2023-09-01 11:37:15,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:37:15" (3/3) ... [2023-09-01 11:37:15,990 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2023-09-01 11:37:15,996 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:37:16,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:37:16,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:37:16,004 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:37:16,121 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 11:37:16,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2023-09-01 11:37:16,255 INFO L130 PetriNetUnfolder]: 14/163 cut-off events. [2023-09-01 11:37:16,255 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:37:16,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-09-01 11:37:16,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2023-09-01 11:37:16,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 147 transitions, 330 flow [2023-09-01 11:37:16,269 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:37:16,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 147 transitions, 330 flow [2023-09-01 11:37:16,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 147 transitions, 330 flow [2023-09-01 11:37:16,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 147 transitions, 330 flow [2023-09-01 11:37:16,313 INFO L130 PetriNetUnfolder]: 14/147 cut-off events. [2023-09-01 11:37:16,313 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:37:16,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 147 events. 14/147 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-09-01 11:37:16,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 2916 [2023-09-01 11:37:21,795 INFO L134 LiptonReduction]: Checked pairs total: 3543 [2023-09-01 11:37:21,796 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-09-01 11:37:21,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:37:21,812 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3352b099, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:37:21,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-09-01 11:37:21,822 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2023-09-01 11:37:21,822 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:37:21,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:21,823 INFO L208 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] [2023-09-01 11:37:21,823 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 4 more)] === [2023-09-01 11:37:21,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash 859190718, now seen corresponding path program 1 times [2023-09-01 11:37:21,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:21,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345157522] [2023-09-01 11:37:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:37:22,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:22,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345157522] [2023-09-01 11:37:22,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345157522] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:22,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:37:22,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 11:37:22,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278722211] [2023-09-01 11:37:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:22,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:37:22,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:37:22,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:37:22,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 293 [2023-09-01 11:37:22,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:22,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:22,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 293 [2023-09-01 11:37:22,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:23,204 INFO L130 PetriNetUnfolder]: 3277/3973 cut-off events. [2023-09-01 11:37:23,205 INFO L131 PetriNetUnfolder]: For 313/313 co-relation queries the response was YES. [2023-09-01 11:37:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 3973 events. 3277/3973 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10583 event pairs, 837 based on Foata normal form. 1/2272 useless extension candidates. Maximal degree in co-relation 5564. Up to 2141 conditions per place. [2023-09-01 11:37:23,227 INFO L137 encePairwiseOnDemand]: 289/293 looper letters, 59 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2023-09-01 11:37:23,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 309 flow [2023-09-01 11:37:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:37:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:37:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-09-01 11:37:23,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574516496018203 [2023-09-01 11:37:23,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-09-01 11:37:23,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-09-01 11:37:23,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:23,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-09-01 11:37:23,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:23,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:23,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:23,263 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 110 flow. Second operand 3 states and 490 transitions. [2023-09-01 11:37:23,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 309 flow [2023-09-01 11:37:23,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 271 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 11:37:23,270 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 105 flow [2023-09-01 11:37:23,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-09-01 11:37:23,275 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2023-09-01 11:37:23,275 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 105 flow [2023-09-01 11:37:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:23,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:23,276 INFO L208 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] [2023-09-01 11:37:23,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:37:23,276 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 4 more)] === [2023-09-01 11:37:23,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1079964367, now seen corresponding path program 1 times [2023-09-01 11:37:23,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:23,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033172480] [2023-09-01 11:37:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:23,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:37:23,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:23,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033172480] [2023-09-01 11:37:23,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033172480] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:23,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:37:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:37:23,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359913519] [2023-09-01 11:37:23,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:23,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:37:23,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:37:23,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:23,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:23,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:37:23,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:24,258 INFO L130 PetriNetUnfolder]: 4887/5960 cut-off events. [2023-09-01 11:37:24,259 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2023-09-01 11:37:24,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13241 conditions, 5960 events. 4887/5960 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17742 event pairs, 529 based on Foata normal form. 126/4330 useless extension candidates. Maximal degree in co-relation 7451. Up to 4746 conditions per place. [2023-09-01 11:37:24,285 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 74 selfloop transitions, 13 changer transitions 7/94 dead transitions. [2023-09-01 11:37:24,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 94 transitions, 425 flow [2023-09-01 11:37:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:37:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:37:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2023-09-01 11:37:24,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034129692832765 [2023-09-01 11:37:24,288 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2023-09-01 11:37:24,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2023-09-01 11:37:24,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:24,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2023-09-01 11:37:24,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:24,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:24,294 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:24,294 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 105 flow. Second operand 4 states and 590 transitions. [2023-09-01 11:37:24,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 94 transitions, 425 flow [2023-09-01 11:37:24,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 94 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:37:24,300 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 191 flow [2023-09-01 11:37:24,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2023-09-01 11:37:24,301 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2023-09-01 11:37:24,301 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 191 flow [2023-09-01 11:37:24,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:24,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:24,302 INFO L208 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] [2023-09-01 11:37:24,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 11:37:24,303 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 4 more)] === [2023-09-01 11:37:24,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 978865401, now seen corresponding path program 1 times [2023-09-01 11:37:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:24,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509552612] [2023-09-01 11:37:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:37:24,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509552612] [2023-09-01 11:37:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509552612] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:24,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842660162] [2023-09-01 11:37:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:24,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:24,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:24,633 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) [2023-09-01 11:37:24,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:37:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:37:24,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:37:25,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:37:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842660162] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:25,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:37:25,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 11:37:25,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215382422] [2023-09-01 11:37:25,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:25,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:37:25,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:37:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:37:25,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 293 [2023-09-01 11:37:25,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:25,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:25,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 293 [2023-09-01 11:37:25,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:25,632 INFO L130 PetriNetUnfolder]: 6427/7817 cut-off events. [2023-09-01 11:37:25,632 INFO L131 PetriNetUnfolder]: For 5153/5153 co-relation queries the response was YES. [2023-09-01 11:37:25,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21888 conditions, 7817 events. 6427/7817 cut-off events. For 5153/5153 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23405 event pairs, 2167 based on Foata normal form. 1/7818 useless extension candidates. Maximal degree in co-relation 12123. Up to 5110 conditions per place. [2023-09-01 11:37:25,670 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 67 selfloop transitions, 13 changer transitions 5/85 dead transitions. [2023-09-01 11:37:25,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 456 flow [2023-09-01 11:37:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:37:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:37:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-09-01 11:37:25,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460750853242321 [2023-09-01 11:37:25,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-09-01 11:37:25,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-09-01 11:37:25,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:25,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-09-01 11:37:25,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:25,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:25,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:25,677 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 191 flow. Second operand 3 states and 480 transitions. [2023-09-01 11:37:25,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 85 transitions, 456 flow [2023-09-01 11:37:25,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 85 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:37:25,681 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 256 flow [2023-09-01 11:37:25,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-09-01 11:37:25,682 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-09-01 11:37:25,682 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 256 flow [2023-09-01 11:37:25,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:25,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:25,683 INFO L208 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] [2023-09-01 11:37:25,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 11:37:25,890 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 [2023-09-01 11:37:25,890 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 4 more)] === [2023-09-01 11:37:25,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1588966705, now seen corresponding path program 1 times [2023-09-01 11:37:25,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:25,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620711025] [2023-09-01 11:37:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:25,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:37:26,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:26,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620711025] [2023-09-01 11:37:26,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620711025] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:26,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:37:26,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:37:26,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682300367] [2023-09-01 11:37:26,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:26,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:26,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:26,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:37:26,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:37:26,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:26,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:26,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:37:26,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:26,889 INFO L130 PetriNetUnfolder]: 6271/7661 cut-off events. [2023-09-01 11:37:26,890 INFO L131 PetriNetUnfolder]: For 9563/9563 co-relation queries the response was YES. [2023-09-01 11:37:26,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24370 conditions, 7661 events. 6271/7661 cut-off events. For 9563/9563 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23885 event pairs, 1083 based on Foata normal form. 156/7817 useless extension candidates. Maximal degree in co-relation 13894. Up to 6447 conditions per place. [2023-09-01 11:37:26,927 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 80 selfloop transitions, 19 changer transitions 9/108 dead transitions. [2023-09-01 11:37:26,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 644 flow [2023-09-01 11:37:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:37:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:37:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2023-09-01 11:37:26,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034129692832765 [2023-09-01 11:37:26,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2023-09-01 11:37:26,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2023-09-01 11:37:26,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:26,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2023-09-01 11:37:26,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:26,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:26,935 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:26,935 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 256 flow. Second operand 4 states and 590 transitions. [2023-09-01 11:37:26,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 644 flow [2023-09-01 11:37:26,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 619 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:37:26,950 INFO L231 Difference]: Finished difference. Result has 51 places, 63 transitions, 336 flow [2023-09-01 11:37:26,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=51, PETRI_TRANSITIONS=63} [2023-09-01 11:37:26,953 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-09-01 11:37:26,953 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 63 transitions, 336 flow [2023-09-01 11:37:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:26,954 INFO L208 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] [2023-09-01 11:37:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:37:26,954 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 4 more)] === [2023-09-01 11:37:26,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1722538193, now seen corresponding path program 2 times [2023-09-01 11:37:26,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:26,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510115962] [2023-09-01 11:37:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:37:27,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510115962] [2023-09-01 11:37:27,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510115962] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513052482] [2023-09-01 11:37:27,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:37:27,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:27,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:27,193 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) [2023-09-01 11:37:27,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:37:27,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:37:27,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:37:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:37:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:27,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:37:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513052482] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:27,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:37:27,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 11:37:27,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734288069] [2023-09-01 11:37:27,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:27,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:37:27,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:27,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:37:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:37:27,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 293 [2023-09-01 11:37:27,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 63 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:27,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:27,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 293 [2023-09-01 11:37:27,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:28,161 INFO L130 PetriNetUnfolder]: 9527/11599 cut-off events. [2023-09-01 11:37:28,162 INFO L131 PetriNetUnfolder]: For 12551/12551 co-relation queries the response was YES. [2023-09-01 11:37:28,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35496 conditions, 11599 events. 9527/11599 cut-off events. For 12551/12551 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 37435 event pairs, 3399 based on Foata normal form. 1/11600 useless extension candidates. Maximal degree in co-relation 21625. Up to 6396 conditions per place. [2023-09-01 11:37:28,220 INFO L137 encePairwiseOnDemand]: 289/293 looper letters, 77 selfloop transitions, 13 changer transitions 5/95 dead transitions. [2023-09-01 11:37:28,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 95 transitions, 631 flow [2023-09-01 11:37:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:37:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:37:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-09-01 11:37:28,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620022753128555 [2023-09-01 11:37:28,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-09-01 11:37:28,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-09-01 11:37:28,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:28,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-09-01 11:37:28,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:28,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:28,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:28,227 INFO L175 Difference]: Start difference. First operand has 51 places, 63 transitions, 336 flow. Second operand 3 states and 494 transitions. [2023-09-01 11:37:28,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 95 transitions, 631 flow [2023-09-01 11:37:28,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 95 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:37:28,252 INFO L231 Difference]: Finished difference. Result has 53 places, 65 transitions, 372 flow [2023-09-01 11:37:28,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=372, PETRI_PLACES=53, PETRI_TRANSITIONS=65} [2023-09-01 11:37:28,254 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-09-01 11:37:28,257 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 65 transitions, 372 flow [2023-09-01 11:37:28,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:28,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:28,258 INFO L208 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] [2023-09-01 11:37:28,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:37:28,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:28,463 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 4 more)] === [2023-09-01 11:37:28,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash 810242775, now seen corresponding path program 1 times [2023-09-01 11:37:28,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:28,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440785315] [2023-09-01 11:37:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:37:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440785315] [2023-09-01 11:37:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440785315] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:28,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:37:28,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:37:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51485905] [2023-09-01 11:37:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:28,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:37:28,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:37:28,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 65 transitions, 372 flow. Second operand has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:28,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:28,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:37:28,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:29,662 INFO L130 PetriNetUnfolder]: 9359/11431 cut-off events. [2023-09-01 11:37:29,663 INFO L131 PetriNetUnfolder]: For 17363/17363 co-relation queries the response was YES. [2023-09-01 11:37:29,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36837 conditions, 11431 events. 9359/11431 cut-off events. For 17363/17363 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 38572 event pairs, 1953 based on Foata normal form. 168/11599 useless extension candidates. Maximal degree in co-relation 24955. Up to 10217 conditions per place. [2023-09-01 11:37:29,708 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 84 selfloop transitions, 27 changer transitions 11/122 dead transitions. [2023-09-01 11:37:29,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 122 transitions, 830 flow [2023-09-01 11:37:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:37:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:37:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2023-09-01 11:37:29,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034129692832765 [2023-09-01 11:37:29,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2023-09-01 11:37:29,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2023-09-01 11:37:29,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:29,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2023-09-01 11:37:29,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:29,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:29,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:29,716 INFO L175 Difference]: Start difference. First operand has 53 places, 65 transitions, 372 flow. Second operand 4 states and 590 transitions. [2023-09-01 11:37:29,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 122 transitions, 830 flow [2023-09-01 11:37:29,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 122 transitions, 817 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:37:29,741 INFO L231 Difference]: Finished difference. Result has 56 places, 75 transitions, 510 flow [2023-09-01 11:37:29,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=510, PETRI_PLACES=56, PETRI_TRANSITIONS=75} [2023-09-01 11:37:29,744 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2023-09-01 11:37:29,745 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 75 transitions, 510 flow [2023-09-01 11:37:29,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:29,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:29,745 INFO L208 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] [2023-09-01 11:37:29,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 11:37:29,746 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 4 more)] === [2023-09-01 11:37:29,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1503143731, now seen corresponding path program 2 times [2023-09-01 11:37:29,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:29,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661194382] [2023-09-01 11:37:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:29,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:37:30,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:30,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661194382] [2023-09-01 11:37:30,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661194382] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:30,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957675208] [2023-09-01 11:37:30,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:37:30,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:30,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:30,013 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) [2023-09-01 11:37:30,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:37:30,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:37:30,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:37:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:37:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:30,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:37:30,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957675208] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:30,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:37:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 11:37:30,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431260101] [2023-09-01 11:37:30,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:30,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:37:30,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:30,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:37:30,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:37:30,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 293 [2023-09-01 11:37:30,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 75 transitions, 510 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:30,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:30,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 293 [2023-09-01 11:37:30,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:31,186 INFO L130 PetriNetUnfolder]: 12615/15369 cut-off events. [2023-09-01 11:37:31,187 INFO L131 PetriNetUnfolder]: For 25373/25373 co-relation queries the response was YES. [2023-09-01 11:37:31,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51043 conditions, 15369 events. 12615/15369 cut-off events. For 25373/25373 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 51496 event pairs, 5545 based on Foata normal form. 1/15370 useless extension candidates. Maximal degree in co-relation 28427. Up to 8756 conditions per place. [2023-09-01 11:37:31,273 INFO L137 encePairwiseOnDemand]: 289/293 looper letters, 89 selfloop transitions, 13 changer transitions 9/111 dead transitions. [2023-09-01 11:37:31,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 111 transitions, 855 flow [2023-09-01 11:37:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:37:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:37:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-09-01 11:37:31,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665529010238908 [2023-09-01 11:37:31,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-09-01 11:37:31,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-09-01 11:37:31,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:31,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-09-01 11:37:31,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:31,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:31,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:31,279 INFO L175 Difference]: Start difference. First operand has 56 places, 75 transitions, 510 flow. Second operand 3 states and 498 transitions. [2023-09-01 11:37:31,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 111 transitions, 855 flow [2023-09-01 11:37:31,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 830 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:37:31,306 INFO L231 Difference]: Finished difference. Result has 58 places, 77 transitions, 538 flow [2023-09-01 11:37:31,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=58, PETRI_TRANSITIONS=77} [2023-09-01 11:37:31,307 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-09-01 11:37:31,307 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 77 transitions, 538 flow [2023-09-01 11:37:31,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:31,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:31,307 INFO L208 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] [2023-09-01 11:37:31,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:37:31,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:31,513 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 4 more)] === [2023-09-01 11:37:31,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1650756802, now seen corresponding path program 1 times [2023-09-01 11:37:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:31,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969613765] [2023-09-01 11:37:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:31,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:31,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:31,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969613765] [2023-09-01 11:37:31,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969613765] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:31,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354026378] [2023-09-01 11:37:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:31,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:31,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:31,725 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) [2023-09-01 11:37:31,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:37:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:31,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:37:31,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:31,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:37:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354026378] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:37:32,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:37:32,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 11:37:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707428799] [2023-09-01 11:37:32,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:37:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:37:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:37:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:37:32,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:37:32,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 77 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:32,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:32,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:37:32,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:33,341 INFO L130 PetriNetUnfolder]: 17771/21680 cut-off events. [2023-09-01 11:37:33,341 INFO L131 PetriNetUnfolder]: For 38903/38903 co-relation queries the response was YES. [2023-09-01 11:37:33,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74244 conditions, 21680 events. 17771/21680 cut-off events. For 38903/38903 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 79240 event pairs, 3731 based on Foata normal form. 565/22245 useless extension candidates. Maximal degree in co-relation 48926. Up to 8936 conditions per place. [2023-09-01 11:37:33,451 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 127 selfloop transitions, 32 changer transitions 35/194 dead transitions. [2023-09-01 11:37:33,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 194 transitions, 1337 flow [2023-09-01 11:37:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:37:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:37:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-09-01 11:37:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113765642775882 [2023-09-01 11:37:33,454 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-09-01 11:37:33,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-09-01 11:37:33,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:33,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-09-01 11:37:33,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:33,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:33,460 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:33,460 INFO L175 Difference]: Start difference. First operand has 58 places, 77 transitions, 538 flow. Second operand 6 states and 899 transitions. [2023-09-01 11:37:33,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 194 transitions, 1337 flow [2023-09-01 11:37:33,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 194 transitions, 1324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:37:33,514 INFO L231 Difference]: Finished difference. Result has 64 places, 79 transitions, 620 flow [2023-09-01 11:37:33,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=64, PETRI_TRANSITIONS=79} [2023-09-01 11:37:33,515 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2023-09-01 11:37:33,515 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 79 transitions, 620 flow [2023-09-01 11:37:33,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:33,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:33,516 INFO L208 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] [2023-09-01 11:37:33,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:37:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:33,722 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 4 more)] === [2023-09-01 11:37:33,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:33,722 INFO L85 PathProgramCache]: Analyzing trace with hash 201729358, now seen corresponding path program 1 times [2023-09-01 11:37:33,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:33,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394525646] [2023-09-01 11:37:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:33,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:33,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:33,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394525646] [2023-09-01 11:37:33,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394525646] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:33,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904970443] [2023-09-01 11:37:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:33,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:33,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:33,933 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) [2023-09-01 11:37:33,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:37:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:34,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:37:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:34,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:37:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904970443] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:37:34,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:37:34,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 11:37:34,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316218010] [2023-09-01 11:37:34,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:37:34,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:37:34,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:34,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:37:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:37:34,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:37:34,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 79 transitions, 620 flow. Second operand has 6 states, 6 states have (on average 135.66666666666666) internal successors, (814), 6 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:34,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:34,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:37:34,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:35,953 INFO L130 PetriNetUnfolder]: 23171/28330 cut-off events. [2023-09-01 11:37:35,954 INFO L131 PetriNetUnfolder]: For 67761/67761 co-relation queries the response was YES. [2023-09-01 11:37:36,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102761 conditions, 28330 events. 23171/28330 cut-off events. For 67761/67761 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 109009 event pairs, 3613 based on Foata normal form. 757/29087 useless extension candidates. Maximal degree in co-relation 54810. Up to 10010 conditions per place. [2023-09-01 11:37:36,083 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 154 selfloop transitions, 30 changer transitions 18/202 dead transitions. [2023-09-01 11:37:36,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 202 transitions, 1602 flow [2023-09-01 11:37:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:37:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:37:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 887 transitions. [2023-09-01 11:37:36,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045506257110353 [2023-09-01 11:37:36,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 887 transitions. [2023-09-01 11:37:36,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 887 transitions. [2023-09-01 11:37:36,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:36,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 887 transitions. [2023-09-01 11:37:36,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:36,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:36,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:36,092 INFO L175 Difference]: Start difference. First operand has 64 places, 79 transitions, 620 flow. Second operand 6 states and 887 transitions. [2023-09-01 11:37:36,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 202 transitions, 1602 flow [2023-09-01 11:37:36,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 202 transitions, 1538 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 11:37:36,193 INFO L231 Difference]: Finished difference. Result has 69 places, 81 transitions, 663 flow [2023-09-01 11:37:36,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=663, PETRI_PLACES=69, PETRI_TRANSITIONS=81} [2023-09-01 11:37:36,194 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2023-09-01 11:37:36,194 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 81 transitions, 663 flow [2023-09-01 11:37:36,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.66666666666666) internal successors, (814), 6 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:36,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:36,195 INFO L208 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] [2023-09-01 11:37:36,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:37:36,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:36,405 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 4 more)] === [2023-09-01 11:37:36,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -735069493, now seen corresponding path program 1 times [2023-09-01 11:37:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:36,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704729680] [2023-09-01 11:37:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:36,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:36,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:36,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704729680] [2023-09-01 11:37:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704729680] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:36,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42428950] [2023-09-01 11:37:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:36,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:36,604 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) [2023-09-01 11:37:36,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:37:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:37:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:37:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:36,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42428950] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:37:36,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:37:36,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 11:37:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650450130] [2023-09-01 11:37:36,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:37:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:37:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:37:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:37:36,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:37:36,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 81 transitions, 663 flow. Second operand has 6 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:36,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:36,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:37:36,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:39,821 INFO L130 PetriNetUnfolder]: 32931/40393 cut-off events. [2023-09-01 11:37:39,821 INFO L131 PetriNetUnfolder]: For 112155/112155 co-relation queries the response was YES. [2023-09-01 11:37:39,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159006 conditions, 40393 events. 32931/40393 cut-off events. For 112155/112155 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 167655 event pairs, 4945 based on Foata normal form. 1321/41714 useless extension candidates. Maximal degree in co-relation 98913. Up to 17631 conditions per place. [2023-09-01 11:37:39,972 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 153 selfloop transitions, 32 changer transitions 25/210 dead transitions. [2023-09-01 11:37:39,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 210 transitions, 1685 flow [2023-09-01 11:37:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:37:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:37:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 895 transitions. [2023-09-01 11:37:39,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091012514220705 [2023-09-01 11:37:39,976 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 895 transitions. [2023-09-01 11:37:39,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 895 transitions. [2023-09-01 11:37:39,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:39,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 895 transitions. [2023-09-01 11:37:39,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:39,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:39,981 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:39,982 INFO L175 Difference]: Start difference. First operand has 69 places, 81 transitions, 663 flow. Second operand 6 states and 895 transitions. [2023-09-01 11:37:39,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 210 transitions, 1685 flow [2023-09-01 11:37:40,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 210 transitions, 1602 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-09-01 11:37:40,185 INFO L231 Difference]: Finished difference. Result has 73 places, 83 transitions, 705 flow [2023-09-01 11:37:40,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=705, PETRI_PLACES=73, PETRI_TRANSITIONS=83} [2023-09-01 11:37:40,186 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-09-01 11:37:40,186 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 83 transitions, 705 flow [2023-09-01 11:37:40,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:40,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:40,186 INFO L208 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] [2023-09-01 11:37:40,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 11:37:40,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:40,389 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 4 more)] === [2023-09-01 11:37:40,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash -737156810, now seen corresponding path program 1 times [2023-09-01 11:37:40,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:40,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860471832] [2023-09-01 11:37:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:40,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860471832] [2023-09-01 11:37:40,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860471832] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:40,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:37:40,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:37:40,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965162986] [2023-09-01 11:37:40,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:40,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:40,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:37:40,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 293 [2023-09-01 11:37:40,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 83 transitions, 705 flow. Second operand has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:40,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:40,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 293 [2023-09-01 11:37:40,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:43,660 INFO L130 PetriNetUnfolder]: 37866/46390 cut-off events. [2023-09-01 11:37:43,660 INFO L131 PetriNetUnfolder]: For 150964/150964 co-relation queries the response was YES. [2023-09-01 11:37:43,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194579 conditions, 46390 events. 37866/46390 cut-off events. For 150964/150964 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 191228 event pairs, 12186 based on Foata normal form. 1116/47506 useless extension candidates. Maximal degree in co-relation 98049. Up to 40691 conditions per place. [2023-09-01 11:37:43,812 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 104 selfloop transitions, 26 changer transitions 12/142 dead transitions. [2023-09-01 11:37:43,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 142 transitions, 1284 flow [2023-09-01 11:37:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:37:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:37:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-09-01 11:37:43,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051194539249146 [2023-09-01 11:37:43,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-09-01 11:37:43,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-09-01 11:37:43,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:43,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-09-01 11:37:43,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:43,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:43,819 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:43,819 INFO L175 Difference]: Start difference. First operand has 73 places, 83 transitions, 705 flow. Second operand 4 states and 592 transitions. [2023-09-01 11:37:43,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 142 transitions, 1284 flow [2023-09-01 11:37:44,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 142 transitions, 1234 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 11:37:44,234 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 728 flow [2023-09-01 11:37:44,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=728, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2023-09-01 11:37:44,234 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-09-01 11:37:44,234 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 728 flow [2023-09-01 11:37:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:44,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:44,235 INFO L208 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] [2023-09-01 11:37:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 11:37:44,236 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 4 more)] === [2023-09-01 11:37:44,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1437927406, now seen corresponding path program 2 times [2023-09-01 11:37:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:44,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639696789] [2023-09-01 11:37:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:44,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:44,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639696789] [2023-09-01 11:37:44,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639696789] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:44,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:37:44,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:37:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237958736] [2023-09-01 11:37:44,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:44,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:44,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:37:44,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 293 [2023-09-01 11:37:44,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 728 flow. Second operand has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:44,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:44,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 293 [2023-09-01 11:37:44,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:48,536 INFO L130 PetriNetUnfolder]: 43850/53622 cut-off events. [2023-09-01 11:37:48,536 INFO L131 PetriNetUnfolder]: For 171325/171325 co-relation queries the response was YES. [2023-09-01 11:37:48,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230250 conditions, 53622 events. 43850/53622 cut-off events. For 171325/171325 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 224489 event pairs, 14317 based on Foata normal form. 1248/54870 useless extension candidates. Maximal degree in co-relation 127790. Up to 47075 conditions per place. [2023-09-01 11:37:48,730 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 101 selfloop transitions, 26 changer transitions 12/139 dead transitions. [2023-09-01 11:37:48,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 1255 flow [2023-09-01 11:37:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:37:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:37:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-09-01 11:37:48,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051194539249146 [2023-09-01 11:37:48,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-09-01 11:37:48,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-09-01 11:37:48,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:48,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-09-01 11:37:48,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:48,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:48,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:48,736 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 728 flow. Second operand 4 states and 592 transitions. [2023-09-01 11:37:48,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 1255 flow [2023-09-01 11:37:49,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 1206 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 11:37:49,407 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 746 flow [2023-09-01 11:37:49,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=746, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2023-09-01 11:37:49,408 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-09-01 11:37:49,408 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 746 flow [2023-09-01 11:37:49,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:49,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:49,409 INFO L208 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] [2023-09-01 11:37:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:37:49,409 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 4 more)] === [2023-09-01 11:37:49,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1844332026, now seen corresponding path program 3 times [2023-09-01 11:37:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:49,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965581564] [2023-09-01 11:37:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:49,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:49,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965581564] [2023-09-01 11:37:49,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965581564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:49,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:37:49,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:37:49,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922603869] [2023-09-01 11:37:49,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:49,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:37:49,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 293 [2023-09-01 11:37:49,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 746 flow. Second operand has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:49,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:49,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 293 [2023-09-01 11:37:49,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:53,220 INFO L130 PetriNetUnfolder]: 47994/58602 cut-off events. [2023-09-01 11:37:53,220 INFO L131 PetriNetUnfolder]: For 202582/202582 co-relation queries the response was YES. [2023-09-01 11:37:53,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257703 conditions, 58602 events. 47994/58602 cut-off events. For 202582/202582 co-relation queries the response was YES. Maximal size of possible extension queue 1503. Compared 246886 event pairs, 15767 based on Foata normal form. 836/59438 useless extension candidates. Maximal degree in co-relation 157494. Up to 53907 conditions per place. [2023-09-01 11:37:53,449 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 102 selfloop transitions, 26 changer transitions 12/140 dead transitions. [2023-09-01 11:37:53,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 140 transitions, 1279 flow [2023-09-01 11:37:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:37:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:37:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-09-01 11:37:53,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051194539249146 [2023-09-01 11:37:53,451 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-09-01 11:37:53,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-09-01 11:37:53,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:53,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-09-01 11:37:53,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:53,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:53,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:53,455 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 746 flow. Second operand 4 states and 592 transitions. [2023-09-01 11:37:53,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 140 transitions, 1279 flow [2023-09-01 11:37:54,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 140 transitions, 1230 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 11:37:54,258 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 764 flow [2023-09-01 11:37:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=764, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2023-09-01 11:37:54,259 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2023-09-01 11:37:54,259 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 764 flow [2023-09-01 11:37:54,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:54,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:54,260 INFO L208 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] [2023-09-01 11:37:54,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 11:37:54,260 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 4 more)] === [2023-09-01 11:37:54,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1860257788, now seen corresponding path program 1 times [2023-09-01 11:37:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:54,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660360910] [2023-09-01 11:37:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:54,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:54,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660360910] [2023-09-01 11:37:54,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660360910] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200352086] [2023-09-01 11:37:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:54,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:54,471 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) [2023-09-01 11:37:54,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:37:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:37:54,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:37:54,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:37:54,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200352086] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:54,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:37:54,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-09-01 11:37:54,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861018890] [2023-09-01 11:37:54,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:54,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:54,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:54,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:37:54,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 293 [2023-09-01 11:37:54,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 764 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:54,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:54,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 293 [2023-09-01 11:37:54,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:37:57,795 INFO L130 PetriNetUnfolder]: 41648/50891 cut-off events. [2023-09-01 11:37:57,795 INFO L131 PetriNetUnfolder]: For 182917/182917 co-relation queries the response was YES. [2023-09-01 11:37:57,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227042 conditions, 50891 events. 41648/50891 cut-off events. For 182917/182917 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 217306 event pairs, 3683 based on Foata normal form. 1276/52167 useless extension candidates. Maximal degree in co-relation 189713. Up to 23987 conditions per place. [2023-09-01 11:37:58,009 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 126 selfloop transitions, 14 changer transitions 53/193 dead transitions. [2023-09-01 11:37:58,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 193 transitions, 1731 flow [2023-09-01 11:37:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:37:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:37:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2023-09-01 11:37:58,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543344709897611 [2023-09-01 11:37:58,011 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2023-09-01 11:37:58,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2023-09-01 11:37:58,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:58,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2023-09-01 11:37:58,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:58,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:58,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:58,020 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 764 flow. Second operand 5 states and 796 transitions. [2023-09-01 11:37:58,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 193 transitions, 1731 flow [2023-09-01 11:37:58,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 193 transitions, 1671 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 11:37:58,603 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 639 flow [2023-09-01 11:37:58,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=639, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2023-09-01 11:37:58,603 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2023-09-01 11:37:58,603 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 639 flow [2023-09-01 11:37:58,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:58,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:58,604 INFO L208 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] [2023-09-01 11:37:58,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 11:37:58,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:58,805 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 4 more)] === [2023-09-01 11:37:58,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1742927478, now seen corresponding path program 2 times [2023-09-01 11:37:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:58,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094484155] [2023-09-01 11:37:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:37:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:58,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094484155] [2023-09-01 11:37:58,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094484155] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:58,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309011579] [2023-09-01 11:37:58,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:37:58,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:58,983 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) [2023-09-01 11:37:59,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 11:37:59,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:37:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:37:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:37:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:37:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:37:59,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:37:59,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309011579] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:37:59,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:37:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-09-01 11:37:59,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657466347] [2023-09-01 11:37:59,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:37:59,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:37:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:37:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:37:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:37:59,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 293 [2023-09-01 11:37:59,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 639 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:59,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:37:59,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 293 [2023-09-01 11:37:59,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:38:01,459 INFO L130 PetriNetUnfolder]: 28960/35192 cut-off events. [2023-09-01 11:38:01,459 INFO L131 PetriNetUnfolder]: For 142660/142660 co-relation queries the response was YES. [2023-09-01 11:38:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162237 conditions, 35192 events. 28960/35192 cut-off events. For 142660/142660 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 137323 event pairs, 2134 based on Foata normal form. 822/36014 useless extension candidates. Maximal degree in co-relation 137881. Up to 15973 conditions per place. [2023-09-01 11:38:01,604 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 131 selfloop transitions, 8 changer transitions 46/185 dead transitions. [2023-09-01 11:38:01,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 185 transitions, 1677 flow [2023-09-01 11:38:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:38:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:38:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2023-09-01 11:38:01,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406143344709897 [2023-09-01 11:38:01,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2023-09-01 11:38:01,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2023-09-01 11:38:01,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:38:01,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2023-09-01 11:38:01,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.4) internal successors, (792), 5 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) [2023-09-01 11:38:01,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:01,611 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:01,611 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 639 flow. Second operand 5 states and 792 transitions. [2023-09-01 11:38:01,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 185 transitions, 1677 flow [2023-09-01 11:38:01,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 185 transitions, 1625 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-09-01 11:38:01,991 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 530 flow [2023-09-01 11:38:01,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=530, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2023-09-01 11:38:01,992 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2023-09-01 11:38:01,992 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 530 flow [2023-09-01 11:38:01,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:01,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:38:01,992 INFO L208 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] [2023-09-01 11:38:01,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 11:38:02,192 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,SelfDestructingSolverStorable14 [2023-09-01 11:38:02,193 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 11:38:02,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:38:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash -66181106, now seen corresponding path program 3 times [2023-09-01 11:38:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:38:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210051296] [2023-09-01 11:38:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:38:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:38:02,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:38:02,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210051296] [2023-09-01 11:38:02,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210051296] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:38:02,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042687313] [2023-09-01 11:38:02,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:38:02,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:38:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:38:02,369 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) [2023-09-01 11:38:02,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 11:38:02,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:38:02,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:38:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:38:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:38:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:38:02,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:38:02,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042687313] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:38:02,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:38:02,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-09-01 11:38:02,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233144377] [2023-09-01 11:38:02,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:38:02,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:38:02,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:38:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:38:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:38:02,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 293 [2023-09-01 11:38:02,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 530 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:02,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:38:02,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 293 [2023-09-01 11:38:02,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:38:05,011 INFO L130 PetriNetUnfolder]: 26526/32073 cut-off events. [2023-09-01 11:38:05,011 INFO L131 PetriNetUnfolder]: For 127499/127499 co-relation queries the response was YES. [2023-09-01 11:38:05,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150842 conditions, 32073 events. 26526/32073 cut-off events. For 127499/127499 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 118734 event pairs, 3762 based on Foata normal form. 816/32889 useless extension candidates. Maximal degree in co-relation 129072. Up to 20247 conditions per place. [2023-09-01 11:38:05,143 INFO L137 encePairwiseOnDemand]: 289/293 looper letters, 128 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2023-09-01 11:38:05,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 1233 flow [2023-09-01 11:38:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:38:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:38:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2023-09-01 11:38:05,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349829351535836 [2023-09-01 11:38:05,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2023-09-01 11:38:05,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2023-09-01 11:38:05,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:38:05,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2023-09-01 11:38:05,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:05,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:05,149 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:05,149 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 530 flow. Second operand 4 states and 627 transitions. [2023-09-01 11:38:05,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 1233 flow [2023-09-01 11:38:05,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 137 transitions, 1209 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 11:38:05,395 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 539 flow [2023-09-01 11:38:05,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=539, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2023-09-01 11:38:05,395 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2023-09-01 11:38:05,396 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 539 flow [2023-09-01 11:38:05,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:05,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:38:05,396 INFO L208 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] [2023-09-01 11:38:05,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 11:38:05,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 11:38:05,597 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 11:38:05,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:38:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1199386863, now seen corresponding path program 1 times [2023-09-01 11:38:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:38:05,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978328116] [2023-09-01 11:38:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:05,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:38:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:38:05,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:38:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978328116] [2023-09-01 11:38:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978328116] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:38:05,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:38:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:38:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136389078] [2023-09-01 11:38:05,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:38:05,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:38:05,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:38:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:38:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:38:05,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:38:05,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 539 flow. Second operand has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:05,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:38:05,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:38:05,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:38:08,132 INFO L130 PetriNetUnfolder]: 28538/34525 cut-off events. [2023-09-01 11:38:08,132 INFO L131 PetriNetUnfolder]: For 152390/152390 co-relation queries the response was YES. [2023-09-01 11:38:08,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168078 conditions, 34525 events. 28538/34525 cut-off events. For 152390/152390 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 132521 event pairs, 4076 based on Foata normal form. 440/34965 useless extension candidates. Maximal degree in co-relation 128356. Up to 19933 conditions per place. [2023-09-01 11:38:08,316 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 104 selfloop transitions, 8 changer transitions 27/139 dead transitions. [2023-09-01 11:38:08,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 139 transitions, 1166 flow [2023-09-01 11:38:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:38:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:38:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 718 transitions. [2023-09-01 11:38:08,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4901023890784983 [2023-09-01 11:38:08,319 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 718 transitions. [2023-09-01 11:38:08,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 718 transitions. [2023-09-01 11:38:08,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:38:08,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 718 transitions. [2023-09-01 11:38:08,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:08,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:08,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:08,324 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 539 flow. Second operand 5 states and 718 transitions. [2023-09-01 11:38:08,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 139 transitions, 1166 flow [2023-09-01 11:38:09,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1136 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 11:38:09,085 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 476 flow [2023-09-01 11:38:09,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2023-09-01 11:38:09,085 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2023-09-01 11:38:09,086 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 476 flow [2023-09-01 11:38:09,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:09,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:38:09,092 INFO L208 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] [2023-09-01 11:38:09,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 11:38:09,092 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 11:38:09,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:38:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1898826339, now seen corresponding path program 2 times [2023-09-01 11:38:09,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:38:09,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134354370] [2023-09-01 11:38:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:09,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:38:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:38:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:38:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134354370] [2023-09-01 11:38:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134354370] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:38:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880199105] [2023-09-01 11:38:09,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:38:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:38:09,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:38:09,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:38:09,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 11:38:09,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:38:09,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:38:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:38:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:38:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:38:09,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:38:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:38:09,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880199105] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:38:09,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:38:09,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2023-09-01 11:38:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34254719] [2023-09-01 11:38:09,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:38:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:38:09,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:38:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:38:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:38:09,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:38:09,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:09,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:38:09,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:38:09,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:38:12,207 INFO L130 PetriNetUnfolder]: 31652/38211 cut-off events. [2023-09-01 11:38:12,207 INFO L131 PetriNetUnfolder]: For 158224/158224 co-relation queries the response was YES. [2023-09-01 11:38:12,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181614 conditions, 38211 events. 31652/38211 cut-off events. For 158224/158224 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 149404 event pairs, 2800 based on Foata normal form. 1040/39251 useless extension candidates. Maximal degree in co-relation 155763. Up to 25583 conditions per place. [2023-09-01 11:38:12,410 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 156 selfloop transitions, 16 changer transitions 0/172 dead transitions. [2023-09-01 11:38:12,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 172 transitions, 1418 flow [2023-09-01 11:38:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:38:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:38:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 859 transitions. [2023-09-01 11:38:12,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48862343572241185 [2023-09-01 11:38:12,412 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 859 transitions. [2023-09-01 11:38:12,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 859 transitions. [2023-09-01 11:38:12,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:38:12,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 859 transitions. [2023-09-01 11:38:12,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.16666666666666) internal successors, (859), 6 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:12,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:12,417 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:12,417 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 476 flow. Second operand 6 states and 859 transitions. [2023-09-01 11:38:12,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 172 transitions, 1418 flow [2023-09-01 11:38:13,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 172 transitions, 1399 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 11:38:13,054 INFO L231 Difference]: Finished difference. Result has 89 places, 70 transitions, 545 flow [2023-09-01 11:38:13,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=545, PETRI_PLACES=89, PETRI_TRANSITIONS=70} [2023-09-01 11:38:13,054 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2023-09-01 11:38:13,054 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 70 transitions, 545 flow [2023-09-01 11:38:13,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:13,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:38:13,055 INFO L208 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] [2023-09-01 11:38:13,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 11:38:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 11:38:13,255 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 11:38:13,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:38:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2075406454, now seen corresponding path program 1 times [2023-09-01 11:38:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:38:13,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888349437] [2023-09-01 11:38:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:38:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:38:13,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:38:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888349437] [2023-09-01 11:38:13,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888349437] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:38:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403214498] [2023-09-01 11:38:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:13,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:38:13,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:38:13,461 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:38:13,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 11:38:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:38:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:38:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:38:13,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:38:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:38:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403214498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:38:13,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:38:13,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2023-09-01 11:38:13,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925567718] [2023-09-01 11:38:13,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:38:13,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:38:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:38:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:38:13,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:38:13,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 11:38:13,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 70 transitions, 545 flow. Second operand has 6 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:13,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:38:13,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 11:38:13,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:38:16,079 INFO L130 PetriNetUnfolder]: 26332/31772 cut-off events. [2023-09-01 11:38:16,079 INFO L131 PetriNetUnfolder]: For 184435/184435 co-relation queries the response was YES. [2023-09-01 11:38:16,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161790 conditions, 31772 events. 26332/31772 cut-off events. For 184435/184435 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 120110 event pairs, 1722 based on Foata normal form. 808/32580 useless extension candidates. Maximal degree in co-relation 139667. Up to 13156 conditions per place. [2023-09-01 11:38:16,260 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 138 selfloop transitions, 12 changer transitions 47/197 dead transitions. [2023-09-01 11:38:16,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 197 transitions, 1762 flow [2023-09-01 11:38:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:38:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:38:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 868 transitions. [2023-09-01 11:38:16,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937428896473265 [2023-09-01 11:38:16,263 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 868 transitions. [2023-09-01 11:38:16,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 868 transitions. [2023-09-01 11:38:16,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:38:16,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 868 transitions. [2023-09-01 11:38:16,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.66666666666666) internal successors, (868), 6 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:16,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:16,267 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:16,267 INFO L175 Difference]: Start difference. First operand has 89 places, 70 transitions, 545 flow. Second operand 6 states and 868 transitions. [2023-09-01 11:38:16,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 197 transitions, 1762 flow [2023-09-01 11:38:16,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 197 transitions, 1685 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-09-01 11:38:16,673 INFO L231 Difference]: Finished difference. Result has 93 places, 70 transitions, 548 flow [2023-09-01 11:38:16,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=548, PETRI_PLACES=93, PETRI_TRANSITIONS=70} [2023-09-01 11:38:16,674 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2023-09-01 11:38:16,674 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 70 transitions, 548 flow [2023-09-01 11:38:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:16,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:38:16,674 INFO L208 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] [2023-09-01 11:38:16,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 11:38:16,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:38:16,875 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 11:38:16,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:38:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1490440730, now seen corresponding path program 2 times [2023-09-01 11:38:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:38:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430878158] [2023-09-01 11:38:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:16,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:38:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:38:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:38:17,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430878158] [2023-09-01 11:38:17,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430878158] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:38:17,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199271575] [2023-09-01 11:38:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:38:17,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:38:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:38:17,099 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:38:17,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 11:38:17,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:38:17,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:38:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:38:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:38:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:38:17,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:38:17,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199271575] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:38:17,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:38:17,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-09-01 11:38:17,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656449730] [2023-09-01 11:38:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:38:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:38:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:38:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:38:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:38:17,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 293 [2023-09-01 11:38:17,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 70 transitions, 548 flow. Second operand has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:17,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:38:17,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 293 [2023-09-01 11:38:17,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:38:19,317 INFO L130 PetriNetUnfolder]: 22304/26705 cut-off events. [2023-09-01 11:38:19,318 INFO L131 PetriNetUnfolder]: For 140725/140725 co-relation queries the response was YES. [2023-09-01 11:38:19,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136097 conditions, 26705 events. 22304/26705 cut-off events. For 140725/140725 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 92892 event pairs, 5480 based on Foata normal form. 592/27297 useless extension candidates. Maximal degree in co-relation 118448. Up to 19461 conditions per place. [2023-09-01 11:38:19,477 INFO L137 encePairwiseOnDemand]: 289/293 looper letters, 132 selfloop transitions, 9 changer transitions 0/141 dead transitions. [2023-09-01 11:38:19,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1299 flow [2023-09-01 11:38:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:38:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:38:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2023-09-01 11:38:19,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349829351535836 [2023-09-01 11:38:19,482 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2023-09-01 11:38:19,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2023-09-01 11:38:19,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:38:19,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2023-09-01 11:38:19,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:19,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:19,485 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:19,486 INFO L175 Difference]: Start difference. First operand has 93 places, 70 transitions, 548 flow. Second operand 4 states and 627 transitions. [2023-09-01 11:38:19,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1299 flow [2023-09-01 11:38:19,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1265 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 11:38:19,869 INFO L231 Difference]: Finished difference. Result has 93 places, 71 transitions, 550 flow [2023-09-01 11:38:19,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=550, PETRI_PLACES=93, PETRI_TRANSITIONS=71} [2023-09-01 11:38:19,870 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2023-09-01 11:38:19,870 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 71 transitions, 550 flow [2023-09-01 11:38:19,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:38:19,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:38:19,871 INFO L208 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] [2023-09-01 11:38:19,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 11:38:20,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:38:20,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 11:38:20,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:38:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash 460065354, now seen corresponding path program 1 times [2023-09-01 11:38:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:38:20,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626773355] [2023-09-01 11:38:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:38:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:38:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:38:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626773355] [2023-09-01 11:38:20,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626773355] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:38:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186370424] [2023-09-01 11:38:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:38:20,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:38:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:38:20,677 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:38:20,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 11:38:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:38:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 11:38:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:38:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:38:32,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:39:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:39:26,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186370424] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:39:26,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:39:26,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 4, 4] total 10 [2023-09-01 11:39:26,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95103870] [2023-09-01 11:39:26,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:39:26,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:39:26,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:39:26,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:39:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=94, Unknown=2, NotChecked=0, Total=132 [2023-09-01 11:39:30,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:32,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 293 [2023-09-01 11:39:32,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 71 transitions, 550 flow. Second operand has 12 states, 12 states have (on average 129.25) internal successors, (1551), 12 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:39:32,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:39:32,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 293 [2023-09-01 11:39:32,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:39:34,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:37,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:39,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:40,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:44,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:46,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:48,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:50,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:54,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:39:56,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:40:48,624 WARN L222 SmtUtils]: Spent 35.43s on a formula simplification. DAG size of input: 80 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:40:50,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:40:52,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:40:54,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:08,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:11,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:14,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:16,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:18,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:32,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:34,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:36,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:38,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:41,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:43,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:46,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:48,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:50,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:52,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:58,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:00,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:05,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:07,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:16,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:18,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:27,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:29,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:34,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:36,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:38,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:40,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:42,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:44,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:46,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:46,531 INFO L130 PetriNetUnfolder]: 164974/199046 cut-off events. [2023-09-01 11:42:46,531 INFO L131 PetriNetUnfolder]: For 1039552/1039552 co-relation queries the response was YES. [2023-09-01 11:42:47,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032739 conditions, 199046 events. 164974/199046 cut-off events. For 1039552/1039552 co-relation queries the response was YES. Maximal size of possible extension queue 4688. Compared 919946 event pairs, 2471 based on Foata normal form. 1897/200943 useless extension candidates. Maximal degree in co-relation 813681. Up to 76907 conditions per place. [2023-09-01 11:42:48,065 INFO L137 encePairwiseOnDemand]: 274/293 looper letters, 669 selfloop transitions, 182 changer transitions 411/1262 dead transitions. [2023-09-01 11:42:48,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 1262 transitions, 11185 flow [2023-09-01 11:42:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 11:42:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 11:42:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4982 transitions. [2023-09-01 11:42:48,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858117991223793 [2023-09-01 11:42:48,076 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4982 transitions. [2023-09-01 11:42:48,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4982 transitions. [2023-09-01 11:42:48,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:42:48,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4982 transitions. [2023-09-01 11:42:48,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 142.34285714285716) internal successors, (4982), 35 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:48,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 293.0) internal successors, (10548), 36 states have internal predecessors, (10548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:48,327 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 293.0) internal successors, (10548), 36 states have internal predecessors, (10548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:48,327 INFO L175 Difference]: Start difference. First operand has 93 places, 71 transitions, 550 flow. Second operand 35 states and 4982 transitions. [2023-09-01 11:42:48,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 1262 transitions, 11185 flow [2023-09-01 11:42:55,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 1262 transitions, 11018 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-09-01 11:42:55,712 INFO L231 Difference]: Finished difference. Result has 145 places, 277 transitions, 2885 flow [2023-09-01 11:42:55,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2885, PETRI_PLACES=145, PETRI_TRANSITIONS=277} [2023-09-01 11:42:55,712 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2023-09-01 11:42:55,712 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 277 transitions, 2885 flow [2023-09-01 11:42:55,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.25) internal successors, (1551), 12 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:55,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:42:55,713 INFO L208 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] [2023-09-01 11:42:55,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 11:42:55,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-09-01 11:42:55,913 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 11:42:55,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:42:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1244368104, now seen corresponding path program 2 times [2023-09-01 11:42:55,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:42:55,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898408584] [2023-09-01 11:42:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:42:55,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:42:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:42:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:42:56,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:42:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898408584] [2023-09-01 11:42:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898408584] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:42:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987267663] [2023-09-01 11:42:56,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:42:56,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:42:56,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:42:56,457 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:42:56,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 11:43:08,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:43:08,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:43:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 11:43:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:43:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:43:10,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:43:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:43:44,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987267663] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:43:44,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:43:44,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 15 [2023-09-01 11:43:44,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341331919] [2023-09-01 11:43:44,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:43:44,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 11:43:44,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:43:44,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 11:43:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:43:48,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:43:48,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 293 [2023-09-01 11:43:48,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 277 transitions, 2885 flow. Second operand has 17 states, 17 states have (on average 125.52941176470588) internal successors, (2134), 17 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:43:48,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:43:48,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 293 [2023-09-01 11:43:48,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:43:51,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:43:54,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:43:57,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:44:00,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:44:03,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:44:56,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:44:58,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:00,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:02,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:03,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:10,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:31,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:34,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:36,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:38,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:40,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:41,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:45:56,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:46:24,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:46:26,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:46:50,081 WARN L222 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 90 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:46:54,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:46:57,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:00,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:04,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:08,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:10,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:12,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:14,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:18,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:47:20,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:48:25,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:48:35,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:48:37,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:48:45,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:48:47,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:48:56,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:49:21,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:49:23,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:49:25,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:49:36,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:49:39,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:49:49,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:49:57,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:50:04,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:50:19,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:50:21,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:50:45,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:50:47,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:50:49,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:50:50,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:51:10,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:51:12,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:51:14,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Killed by 15