./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:10:45,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:10:45,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:10:45,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:10:45,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:10:45,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:10:45,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:10:45,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:10:45,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:10:45,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:10:45,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:10:45,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:10:45,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:10:45,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:10:45,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:10:45,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:10:45,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:10:45,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:10:45,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:10:45,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:10:45,086 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:10:45,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:10:45,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:10:45,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:10:45,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:10:45,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:10:45,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:10:45,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:10:45,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:10:45,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:10:45,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:10:45,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:10:45,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:10:45,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:10:45,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:10:45,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:10:45,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:10:45,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:10:45,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:10:45,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:10:45,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:10:45,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:10:45,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:10:45,139 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:10:45,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:10:45,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:10:45,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:10:45,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:10:45,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:10:45,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:10:45,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:10:45,142 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:10:45,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:10:45,143 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:10:45,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:10:45,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:10:45,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:10:45,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:10:45,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:10:45,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:10:45,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:10:45,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:10:45,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:10:45,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:10:45,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:10:45,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:10:45,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:10:45,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:10:45,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:10:45,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:10:45,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:10:45,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:10:45,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:10:45,155 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:10:45,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:10:45,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:10:45,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-07-21 09:10:45,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:10:45,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:10:45,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:10:45,486 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:10:45,487 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:10:45,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-21 09:10:45,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a62d8e1/b600703359ca492fa869f3f72580bbbc/FLAG60e499320 [2022-07-21 09:10:45,985 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:10:45,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-21 09:10:45,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a62d8e1/b600703359ca492fa869f3f72580bbbc/FLAG60e499320 [2022-07-21 09:10:46,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a62d8e1/b600703359ca492fa869f3f72580bbbc [2022-07-21 09:10:46,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:10:46,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:10:46,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:10:46,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:10:46,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:10:46,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16aad958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46, skipping insertion in model container [2022-07-21 09:10:46,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:10:46,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:10:46,170 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-07-21 09:10:46,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:10:46,212 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:10:46,245 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-07-21 09:10:46,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:10:46,264 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:10:46,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46 WrapperNode [2022-07-21 09:10:46,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:10:46,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:10:46,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:10:46,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:10:46,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,298 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-07-21 09:10:46,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:10:46,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:10:46,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:10:46,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:10:46,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:10:46,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:10:46,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:10:46,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:10:46,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (1/1) ... [2022-07-21 09:10:46,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:10:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:46,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:10:46,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:10:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:10:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:10:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:10:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:10:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:10:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:10:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:10:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:10:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:10:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:10:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:10:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:10:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:10:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:10:46,419 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:10:46,509 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:10:46,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:10:46,696 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:10:46,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:10:46,743 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:10:46,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:10:46 BoogieIcfgContainer [2022-07-21 09:10:46,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:10:46,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:10:46,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:10:46,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:10:46,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:10:46" (1/3) ... [2022-07-21 09:10:46,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38306c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:10:46, skipping insertion in model container [2022-07-21 09:10:46,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:46" (2/3) ... [2022-07-21 09:10:46,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38306c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:10:46, skipping insertion in model container [2022-07-21 09:10:46,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:10:46" (3/3) ... [2022-07-21 09:10:46,754 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-21 09:10:46,759 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:10:46,767 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:10:46,767 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:10:46,767 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:10:46,846 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:10:46,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-07-21 09:10:46,951 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-21 09:10:46,952 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:10:46,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-07-21 09:10:46,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-07-21 09:10:46,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-07-21 09:10:46,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:10:46,983 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42cb6777, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b6808d [2022-07-21 09:10:46,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:10:47,020 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-07-21 09:10:47,020 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:10:47,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:47,021 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:47,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash -755524680, now seen corresponding path program 1 times [2022-07-21 09:10:47,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:47,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356782117] [2022-07-21 09:10:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:47,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:47,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:47,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356782117] [2022-07-21 09:10:47,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356782117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:47,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:47,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:10:47,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293888608] [2022-07-21 09:10:47,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:10:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:10:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:10:47,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-07-21 09:10:47,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:47,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-07-21 09:10:47,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:47,270 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2022-07-21 09:10:47,271 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-21 09:10:47,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 7/78 useless extension candidates. Maximal degree in co-relation 49. Up to 9 conditions per place. [2022-07-21 09:10:47,273 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-07-21 09:10:47,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-07-21 09:10:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:10:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:10:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-07-21 09:10:47,284 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-07-21 09:10:47,285 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-07-21 09:10:47,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-07-21 09:10:47,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:47,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-07-21 09:10:47,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,295 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,297 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-07-21 09:10:47,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-07-21 09:10:47,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:10:47,302 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-07-21 09:10:47,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-07-21 09:10:47,308 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-07-21 09:10:47,308 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-07-21 09:10:47,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,309 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:47,309 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:47,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:10:47,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-07-21 09:10:47,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:47,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299423896] [2022-07-21 09:10:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:47,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:47,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:47,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299423896] [2022-07-21 09:10:47,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299423896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:47,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:47,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:10:47,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695901482] [2022-07-21 09:10:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:47,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:10:47,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:10:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:10:47,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-07-21 09:10:47,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:47,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-07-21 09:10:47,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:47,611 INFO L129 PetriNetUnfolder]: 50/172 cut-off events. [2022-07-21 09:10:47,612 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 09:10:47,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 172 events. 50/172 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 496 event pairs, 19 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 284. Up to 69 conditions per place. [2022-07-21 09:10:47,614 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-07-21 09:10:47,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-07-21 09:10:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:10:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:10:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-07-21 09:10:47,618 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-07-21 09:10:47,618 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-07-21 09:10:47,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-07-21 09:10:47,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:47,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-07-21 09:10:47,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,624 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,625 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-07-21 09:10:47,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-07-21 09:10:47,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:10:47,628 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-07-21 09:10:47,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-07-21 09:10:47,629 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-07-21 09:10:47,629 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-07-21 09:10:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,629 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:47,630 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:47,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:10:47,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-07-21 09:10:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:47,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141728159] [2022-07-21 09:10:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:47,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141728159] [2022-07-21 09:10:47,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141728159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859665136] [2022-07-21 09:10:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:47,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:47,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:47,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:10:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:47,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:10:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:48,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:48,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859665136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:48,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:48,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-21 09:10:48,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789808340] [2022-07-21 09:10:48,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:48,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:10:48,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:48,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:10:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:10:48,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-07-21 09:10:48,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 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) [2022-07-21 09:10:48,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:48,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-07-21 09:10:48,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:48,473 INFO L129 PetriNetUnfolder]: 91/351 cut-off events. [2022-07-21 09:10:48,474 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-21 09:10:48,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 351 events. 91/351 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1532 event pairs, 5 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 621. Up to 59 conditions per place. [2022-07-21 09:10:48,484 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-07-21 09:10:48,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-07-21 09:10:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:10:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:10:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-07-21 09:10:48,492 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-07-21 09:10:48,492 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-07-21 09:10:48,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-07-21 09:10:48,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:48,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-07-21 09:10:48,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.4) internal successors, (704), 10 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,499 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,499 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-07-21 09:10:48,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-07-21 09:10:48,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:10:48,506 INFO L242 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-07-21 09:10:48,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-07-21 09:10:48,507 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-07-21 09:10:48,508 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-07-21 09:10:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 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) [2022-07-21 09:10:48,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:48,508 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:48,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:10:48,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:48,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:48,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:48,710 INFO L85 PathProgramCache]: Analyzing trace with hash -368775367, now seen corresponding path program 2 times [2022-07-21 09:10:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:48,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932998540] [2022-07-21 09:10:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:48,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:48,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:48,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932998540] [2022-07-21 09:10:48,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932998540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:48,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089686415] [2022-07-21 09:10:48,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:10:48,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:48,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:48,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:48,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:10:48,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:10:48,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:10:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:49,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:10:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089686415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:49,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:10:49,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-07-21 09:10:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964955468] [2022-07-21 09:10:49,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:49,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:10:49,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:10:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:10:49,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-07-21 09:10:49,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:49,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:49,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-07-21 09:10:49,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:49,274 INFO L129 PetriNetUnfolder]: 69/267 cut-off events. [2022-07-21 09:10:49,275 INFO L130 PetriNetUnfolder]: For 413/419 co-relation queries the response was YES. [2022-07-21 09:10:49,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 267 events. 69/267 cut-off events. For 413/419 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1032 event pairs, 15 based on Foata normal form. 12/271 useless extension candidates. Maximal degree in co-relation 706. Up to 68 conditions per place. [2022-07-21 09:10:49,277 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-07-21 09:10:49,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-07-21 09:10:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:10:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:10:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-07-21 09:10:49,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-07-21 09:10:49,280 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-07-21 09:10:49,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-07-21 09:10:49,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:49,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-07-21 09:10:49,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:49,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:49,283 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:49,283 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-07-21 09:10:49,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-07-21 09:10:49,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:10:49,289 INFO L242 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-07-21 09:10:49,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2022-07-21 09:10:49,290 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-07-21 09:10:49,290 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-07-21 09:10:49,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:49,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:49,291 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:49,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:49,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 09:10:49,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2015979039, now seen corresponding path program 1 times [2022-07-21 09:10:49,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:49,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745486557] [2022-07-21 09:10:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:49,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:49,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:49,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745486557] [2022-07-21 09:10:49,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745486557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:49,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443299458] [2022-07-21 09:10:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:49,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:49,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:49,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:49,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:10:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:49,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:10:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:50,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:50,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443299458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:50,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:50,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-21 09:10:50,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204968753] [2022-07-21 09:10:50,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:50,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:10:50,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:10:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:10:50,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2022-07-21 09:10:50,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 371 flow. Second operand has 18 states, 18 states have (on average 53.333333333333336) internal successors, (960), 18 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:50,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:50,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2022-07-21 09:10:50,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:52,004 INFO L129 PetriNetUnfolder]: 380/1150 cut-off events. [2022-07-21 09:10:52,004 INFO L130 PetriNetUnfolder]: For 2038/2038 co-relation queries the response was YES. [2022-07-21 09:10:52,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 1150 events. 380/1150 cut-off events. For 2038/2038 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7438 event pairs, 30 based on Foata normal form. 2/1148 useless extension candidates. Maximal degree in co-relation 3711. Up to 241 conditions per place. [2022-07-21 09:10:52,015 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 185 selfloop transitions, 96 changer transitions 41/362 dead transitions. [2022-07-21 09:10:52,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 362 transitions, 2654 flow [2022-07-21 09:10:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:10:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:10:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1979 transitions. [2022-07-21 09:10:52,021 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6731292517006803 [2022-07-21 09:10:52,021 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1979 transitions. [2022-07-21 09:10:52,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1979 transitions. [2022-07-21 09:10:52,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:52,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1979 transitions. [2022-07-21 09:10:52,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 56.542857142857144) internal successors, (1979), 35 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,034 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,034 INFO L186 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 35 states and 1979 transitions. [2022-07-21 09:10:52,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 362 transitions, 2654 flow [2022-07-21 09:10:52,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 362 transitions, 2490 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-07-21 09:10:52,051 INFO L242 Difference]: Finished difference. Result has 141 places, 191 transitions, 1406 flow [2022-07-21 09:10:52,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1406, PETRI_PLACES=141, PETRI_TRANSITIONS=191} [2022-07-21 09:10:52,053 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 67 predicate places. [2022-07-21 09:10:52,053 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 1406 flow [2022-07-21 09:10:52,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 53.333333333333336) internal successors, (960), 18 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:52,054 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:52,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:10:52,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:52,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1652012263, now seen corresponding path program 2 times [2022-07-21 09:10:52,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:52,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997337628] [2022-07-21 09:10:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:52,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:52,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:52,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997337628] [2022-07-21 09:10:52,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997337628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:52,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459123122] [2022-07-21 09:10:52,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:10:52,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:52,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:52,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:10:52,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:10:52,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 09:10:52,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:52,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:52,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459123122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:52,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:52,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-21 09:10:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110365976] [2022-07-21 09:10:52,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:52,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:10:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:10:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:10:52,778 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-07-21 09:10:52,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 191 transitions, 1406 flow. Second operand has 14 states, 14 states have (on average 62.57142857142857) internal successors, (876), 14 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:52,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-07-21 09:10:52,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:53,216 INFO L129 PetriNetUnfolder]: 402/1245 cut-off events. [2022-07-21 09:10:53,216 INFO L130 PetriNetUnfolder]: For 5294/5294 co-relation queries the response was YES. [2022-07-21 09:10:53,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1245 events. 402/1245 cut-off events. For 5294/5294 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8183 event pairs, 51 based on Foata normal form. 28/1267 useless extension candidates. Maximal degree in co-relation 4790. Up to 447 conditions per place. [2022-07-21 09:10:53,232 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 117 selfloop transitions, 107 changer transitions 2/274 dead transitions. [2022-07-21 09:10:53,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 274 transitions, 2549 flow [2022-07-21 09:10:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:10:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:10:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 725 transitions. [2022-07-21 09:10:53,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7846320346320347 [2022-07-21 09:10:53,235 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 725 transitions. [2022-07-21 09:10:53,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 725 transitions. [2022-07-21 09:10:53,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:53,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 725 transitions. [2022-07-21 09:10:53,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.9090909090909) internal successors, (725), 11 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,240 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,240 INFO L186 Difference]: Start difference. First operand has 141 places, 191 transitions, 1406 flow. Second operand 11 states and 725 transitions. [2022-07-21 09:10:53,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 274 transitions, 2549 flow [2022-07-21 09:10:53,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 274 transitions, 2513 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-07-21 09:10:53,306 INFO L242 Difference]: Finished difference. Result has 148 places, 227 transitions, 2203 flow [2022-07-21 09:10:53,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2203, PETRI_PLACES=148, PETRI_TRANSITIONS=227} [2022-07-21 09:10:53,310 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 74 predicate places. [2022-07-21 09:10:53,310 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 227 transitions, 2203 flow [2022-07-21 09:10:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.57142857142857) internal successors, (876), 14 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,311 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:53,311 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:53,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:53,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:53,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1903919641, now seen corresponding path program 3 times [2022-07-21 09:10:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:53,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264717124] [2022-07-21 09:10:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:53,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:53,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264717124] [2022-07-21 09:10:53,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264717124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555089578] [2022-07-21 09:10:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:10:53,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:53,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:53,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:10:53,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:10:53,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:53,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:10:53,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:54,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:54,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555089578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:54,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:54,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-21 09:10:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690293643] [2022-07-21 09:10:54,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:10:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:10:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:10:54,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:10:54,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 227 transitions, 2203 flow. Second operand has 20 states, 20 states have (on average 64.1) internal successors, (1282), 20 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:54,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:54,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:10:54,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:57,163 INFO L129 PetriNetUnfolder]: 741/2331 cut-off events. [2022-07-21 09:10:57,164 INFO L130 PetriNetUnfolder]: For 19242/19242 co-relation queries the response was YES. [2022-07-21 09:10:57,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10504 conditions, 2331 events. 741/2331 cut-off events. For 19242/19242 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18200 event pairs, 24 based on Foata normal form. 28/2354 useless extension candidates. Maximal degree in co-relation 10471. Up to 405 conditions per place. [2022-07-21 09:10:57,193 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 143 selfloop transitions, 404 changer transitions 3/617 dead transitions. [2022-07-21 09:10:57,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 617 transitions, 8073 flow [2022-07-21 09:10:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 09:10:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-21 09:10:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3366 transitions. [2022-07-21 09:10:57,201 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-07-21 09:10:57,202 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3366 transitions. [2022-07-21 09:10:57,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3366 transitions. [2022-07-21 09:10:57,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:57,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3366 transitions. [2022-07-21 09:10:57,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 66.0) internal successors, (3366), 51 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,218 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,218 INFO L186 Difference]: Start difference. First operand has 148 places, 227 transitions, 2203 flow. Second operand 51 states and 3366 transitions. [2022-07-21 09:10:57,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 617 transitions, 8073 flow [2022-07-21 09:10:57,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 617 transitions, 8034 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-07-21 09:10:57,316 INFO L242 Difference]: Finished difference. Result has 217 places, 527 transitions, 7424 flow [2022-07-21 09:10:57,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7424, PETRI_PLACES=217, PETRI_TRANSITIONS=527} [2022-07-21 09:10:57,317 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 143 predicate places. [2022-07-21 09:10:57,317 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 527 transitions, 7424 flow [2022-07-21 09:10:57,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.1) internal successors, (1282), 20 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,318 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:57,318 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:57,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:57,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:57,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash -669652269, now seen corresponding path program 4 times [2022-07-21 09:10:57,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:57,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166413473] [2022-07-21 09:10:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:57,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166413473] [2022-07-21 09:10:57,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166413473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538529893] [2022-07-21 09:10:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:10:57,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:57,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:57,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:10:57,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:10:57,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:10:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:57,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:58,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538529893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:58,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:58,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-07-21 09:10:58,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668537150] [2022-07-21 09:10:58,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:58,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:10:58,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:10:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:10:58,229 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-21 09:10:58,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 527 transitions, 7424 flow. Second operand has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:58,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-21 09:10:58,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:00,497 INFO L129 PetriNetUnfolder]: 892/2638 cut-off events. [2022-07-21 09:11:00,498 INFO L130 PetriNetUnfolder]: For 48799/48799 co-relation queries the response was YES. [2022-07-21 09:11:00,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16084 conditions, 2638 events. 892/2638 cut-off events. For 48799/48799 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20818 event pairs, 35 based on Foata normal form. 33/2665 useless extension candidates. Maximal degree in co-relation 16028. Up to 472 conditions per place. [2022-07-21 09:11:00,543 INFO L132 encePairwiseOnDemand]: 73/84 looper letters, 237 selfloop transitions, 591 changer transitions 4/873 dead transitions. [2022-07-21 09:11:00,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 873 transitions, 14493 flow [2022-07-21 09:11:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:11:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:11:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2169 transitions. [2022-07-21 09:11:00,548 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6620879120879121 [2022-07-21 09:11:00,548 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2169 transitions. [2022-07-21 09:11:00,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2169 transitions. [2022-07-21 09:11:00,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:00,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2169 transitions. [2022-07-21 09:11:00,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.61538461538461) internal successors, (2169), 39 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,557 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,558 INFO L186 Difference]: Start difference. First operand has 217 places, 527 transitions, 7424 flow. Second operand 39 states and 2169 transitions. [2022-07-21 09:11:00,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 873 transitions, 14493 flow [2022-07-21 09:11:00,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 873 transitions, 13926 flow, removed 257 selfloop flow, removed 1 redundant places. [2022-07-21 09:11:00,756 INFO L242 Difference]: Finished difference. Result has 271 places, 767 transitions, 12829 flow [2022-07-21 09:11:00,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=6996, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=12829, PETRI_PLACES=271, PETRI_TRANSITIONS=767} [2022-07-21 09:11:00,758 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 197 predicate places. [2022-07-21 09:11:00,758 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 767 transitions, 12829 flow [2022-07-21 09:11:00,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,759 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:00,759 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:00,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:00,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:00,983 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash -669783597, now seen corresponding path program 5 times [2022-07-21 09:11:00,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:00,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634768925] [2022-07-21 09:11:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:00,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:01,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634768925] [2022-07-21 09:11:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634768925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199924806] [2022-07-21 09:11:01,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:11:01,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:01,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:01,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:01,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:11:01,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:11:01,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:01,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:11:01,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:01,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199924806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:01,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:01,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-07-21 09:11:01,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261164720] [2022-07-21 09:11:01,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:01,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:11:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:11:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:11:01,706 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:11:01,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 767 transitions, 12829 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:01,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:01,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:11:01,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:03,272 INFO L129 PetriNetUnfolder]: 1077/3296 cut-off events. [2022-07-21 09:11:03,274 INFO L130 PetriNetUnfolder]: For 83266/83275 co-relation queries the response was YES. [2022-07-21 09:11:03,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22568 conditions, 3296 events. 1077/3296 cut-off events. For 83266/83275 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 27832 event pairs, 20 based on Foata normal form. 4/3291 useless extension candidates. Maximal degree in co-relation 22493. Up to 617 conditions per place. [2022-07-21 09:11:03,342 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 361 selfloop transitions, 659 changer transitions 5/1095 dead transitions. [2022-07-21 09:11:03,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1095 transitions, 20859 flow [2022-07-21 09:11:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:11:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:11:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1580 transitions. [2022-07-21 09:11:03,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837301587301587 [2022-07-21 09:11:03,351 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1580 transitions. [2022-07-21 09:11:03,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1580 transitions. [2022-07-21 09:11:03,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:03,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1580 transitions. [2022-07-21 09:11:03,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.83333333333333) internal successors, (1580), 24 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:03,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:03,364 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:03,365 INFO L186 Difference]: Start difference. First operand has 271 places, 767 transitions, 12829 flow. Second operand 24 states and 1580 transitions. [2022-07-21 09:11:03,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1095 transitions, 20859 flow [2022-07-21 09:11:03,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1095 transitions, 20130 flow, removed 222 selfloop flow, removed 9 redundant places. [2022-07-21 09:11:03,761 INFO L242 Difference]: Finished difference. Result has 297 places, 1033 transitions, 20285 flow [2022-07-21 09:11:03,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12370, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=20285, PETRI_PLACES=297, PETRI_TRANSITIONS=1033} [2022-07-21 09:11:03,762 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 223 predicate places. [2022-07-21 09:11:03,762 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 1033 transitions, 20285 flow [2022-07-21 09:11:03,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:03,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:03,763 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:03,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 09:11:03,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:03,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1978536153, now seen corresponding path program 6 times [2022-07-21 09:11:03,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:03,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545669196] [2022-07-21 09:11:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:03,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:04,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545669196] [2022-07-21 09:11:04,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545669196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568031449] [2022-07-21 09:11:04,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:11:04,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:04,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:04,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:04,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:11:04,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:11:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:11:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:04,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568031449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:04,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:04,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-21 09:11:04,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246553043] [2022-07-21 09:11:04,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:04,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:11:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:11:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:11:04,652 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:11:04,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 1033 transitions, 20285 flow. Second operand has 18 states, 18 states have (on average 64.27777777777777) internal successors, (1157), 18 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:04,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:04,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:11:04,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:12,666 INFO L129 PetriNetUnfolder]: 1619/5380 cut-off events. [2022-07-21 09:11:12,666 INFO L130 PetriNetUnfolder]: For 181812/181813 co-relation queries the response was YES. [2022-07-21 09:11:12,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39862 conditions, 5380 events. 1619/5380 cut-off events. For 181812/181813 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 53181 event pairs, 46 based on Foata normal form. 36/5397 useless extension candidates. Maximal degree in co-relation 39778. Up to 916 conditions per place. [2022-07-21 09:11:12,752 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 328 selfloop transitions, 1339 changer transitions 2/1739 dead transitions. [2022-07-21 09:11:12,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1739 transitions, 38158 flow [2022-07-21 09:11:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-21 09:11:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-07-21 09:11:12,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5790 transitions. [2022-07-21 09:11:12,774 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7832792207792207 [2022-07-21 09:11:12,774 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5790 transitions. [2022-07-21 09:11:12,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5790 transitions. [2022-07-21 09:11:12,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:12,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5790 transitions. [2022-07-21 09:11:12,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 65.79545454545455) internal successors, (5790), 88 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:12,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 84.0) internal successors, (7476), 89 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:12,823 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 84.0) internal successors, (7476), 89 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:12,824 INFO L186 Difference]: Start difference. First operand has 297 places, 1033 transitions, 20285 flow. Second operand 88 states and 5790 transitions. [2022-07-21 09:11:12,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1739 transitions, 38158 flow [2022-07-21 09:11:14,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1739 transitions, 35776 flow, removed 1125 selfloop flow, removed 7 redundant places. [2022-07-21 09:11:14,123 INFO L242 Difference]: Finished difference. Result has 401 places, 1578 transitions, 35362 flow [2022-07-21 09:11:14,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=19561, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=35362, PETRI_PLACES=401, PETRI_TRANSITIONS=1578} [2022-07-21 09:11:14,125 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 327 predicate places. [2022-07-21 09:11:14,125 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1578 transitions, 35362 flow [2022-07-21 09:11:14,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.27777777777777) internal successors, (1157), 18 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:14,126 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:14,126 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:14,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:14,343 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,SelfDestructingSolverStorable9 [2022-07-21 09:11:14,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash -898935893, now seen corresponding path program 7 times [2022-07-21 09:11:14,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433135747] [2022-07-21 09:11:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:14,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433135747] [2022-07-21 09:11:14,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433135747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493434822] [2022-07-21 09:11:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:11:14,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:14,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:14,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:11:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:11:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:14,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:15,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493434822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:15,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:15,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-21 09:11:15,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38623153] [2022-07-21 09:11:15,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:15,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:11:15,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:11:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:11:15,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:11:15,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1578 transitions, 35362 flow. Second operand has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:15,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:15,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:11:15,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:20,906 INFO L129 PetriNetUnfolder]: 2142/7671 cut-off events. [2022-07-21 09:11:20,906 INFO L130 PetriNetUnfolder]: For 144366/144368 co-relation queries the response was YES. [2022-07-21 09:11:20,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54725 conditions, 7671 events. 2142/7671 cut-off events. For 144366/144368 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 84045 event pairs, 116 based on Foata normal form. 26/7672 useless extension candidates. Maximal degree in co-relation 54618. Up to 1358 conditions per place. [2022-07-21 09:11:21,033 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 379 selfloop transitions, 1797 changer transitions 2/2248 dead transitions. [2022-07-21 09:11:21,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 2248 transitions, 54906 flow [2022-07-21 09:11:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 09:11:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-21 09:11:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4497 transitions. [2022-07-21 09:11:21,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7872899159663865 [2022-07-21 09:11:21,042 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4497 transitions. [2022-07-21 09:11:21,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4497 transitions. [2022-07-21 09:11:21,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:21,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4497 transitions. [2022-07-21 09:11:21,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 66.13235294117646) internal successors, (4497), 68 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:21,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 84.0) internal successors, (5796), 69 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:21,060 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 84.0) internal successors, (5796), 69 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:21,060 INFO L186 Difference]: Start difference. First operand has 401 places, 1578 transitions, 35362 flow. Second operand 68 states and 4497 transitions. [2022-07-21 09:11:21,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 2248 transitions, 54906 flow [2022-07-21 09:11:22,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 2248 transitions, 53590 flow, removed 531 selfloop flow, removed 12 redundant places. [2022-07-21 09:11:22,966 INFO L242 Difference]: Finished difference. Result has 470 places, 2083 transitions, 52642 flow [2022-07-21 09:11:22,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=34378, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=52642, PETRI_PLACES=470, PETRI_TRANSITIONS=2083} [2022-07-21 09:11:22,968 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 396 predicate places. [2022-07-21 09:11:22,969 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 2083 transitions, 52642 flow [2022-07-21 09:11:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:22,969 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:22,969 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:22,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:23,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:23,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1892612579, now seen corresponding path program 8 times [2022-07-21 09:11:23,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710122319] [2022-07-21 09:11:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:23,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:23,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710122319] [2022-07-21 09:11:23,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710122319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454610249] [2022-07-21 09:11:23,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:11:23,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:23,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:23,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:11:23,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:11:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:11:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:23,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:24,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454610249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:24,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:24,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-21 09:11:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337623985] [2022-07-21 09:11:24,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:24,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:11:24,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:11:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:11:24,075 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:11:24,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 2083 transitions, 52642 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:24,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:24,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:11:24,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:28,785 INFO L129 PetriNetUnfolder]: 2244/7866 cut-off events. [2022-07-21 09:11:28,785 INFO L130 PetriNetUnfolder]: For 162615/162616 co-relation queries the response was YES. [2022-07-21 09:11:28,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60291 conditions, 7866 events. 2244/7866 cut-off events. For 162615/162616 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 86031 event pairs, 87 based on Foata normal form. 2/7827 useless extension candidates. Maximal degree in co-relation 60170. Up to 1294 conditions per place. [2022-07-21 09:11:28,930 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 718 selfloop transitions, 1484 changer transitions 5/2277 dead transitions. [2022-07-21 09:11:28,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 2277 transitions, 61483 flow [2022-07-21 09:11:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:11:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:11:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2315 transitions. [2022-07-21 09:11:29,105 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7874149659863946 [2022-07-21 09:11:29,105 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2315 transitions. [2022-07-21 09:11:29,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2315 transitions. [2022-07-21 09:11:29,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:29,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2315 transitions. [2022-07-21 09:11:29,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.14285714285714) internal successors, (2315), 35 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:29,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:29,113 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:29,113 INFO L186 Difference]: Start difference. First operand has 470 places, 2083 transitions, 52642 flow. Second operand 35 states and 2315 transitions. [2022-07-21 09:11:29,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 2277 transitions, 61483 flow [2022-07-21 09:11:31,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2277 transitions, 61057 flow, removed 72 selfloop flow, removed 13 redundant places. [2022-07-21 09:11:31,828 INFO L242 Difference]: Finished difference. Result has 500 places, 2215 transitions, 61253 flow [2022-07-21 09:11:31,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=52136, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=61253, PETRI_PLACES=500, PETRI_TRANSITIONS=2215} [2022-07-21 09:11:31,831 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 426 predicate places. [2022-07-21 09:11:31,831 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 2215 transitions, 61253 flow [2022-07-21 09:11:31,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:31,832 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:31,832 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:31,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:32,047 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,SelfDestructingSolverStorable11 [2022-07-21 09:11:32,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1480356137, now seen corresponding path program 9 times [2022-07-21 09:11:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:32,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193422174] [2022-07-21 09:11:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:32,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:32,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193422174] [2022-07-21 09:11:32,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193422174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:32,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368239703] [2022-07-21 09:11:32,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:11:32,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:32,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:32,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:32,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:11:32,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:11:32,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:11:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:32,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:33,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368239703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:33,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:33,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-21 09:11:33,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252995965] [2022-07-21 09:11:33,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:33,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:11:33,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:11:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:11:33,031 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:11:33,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 2215 transitions, 61253 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:33,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:33,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:11:33,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:39,817 INFO L129 PetriNetUnfolder]: 2495/8401 cut-off events. [2022-07-21 09:11:39,817 INFO L130 PetriNetUnfolder]: For 209693/209714 co-relation queries the response was YES. [2022-07-21 09:11:39,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71084 conditions, 8401 events. 2495/8401 cut-off events. For 209693/209714 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 91524 event pairs, 388 based on Foata normal form. 15/8314 useless extension candidates. Maximal degree in co-relation 70952. Up to 2188 conditions per place. [2022-07-21 09:11:40,059 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 926 selfloop transitions, 1567 changer transitions 9/2572 dead transitions. [2022-07-21 09:11:40,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 2572 transitions, 75880 flow [2022-07-21 09:11:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 09:11:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-21 09:11:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2831 transitions. [2022-07-21 09:11:40,064 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837763012181617 [2022-07-21 09:11:40,064 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2831 transitions. [2022-07-21 09:11:40,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2831 transitions. [2022-07-21 09:11:40,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:40,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2831 transitions. [2022-07-21 09:11:40,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 65.83720930232558) internal successors, (2831), 43 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:40,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:40,075 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:40,075 INFO L186 Difference]: Start difference. First operand has 500 places, 2215 transitions, 61253 flow. Second operand 43 states and 2831 transitions. [2022-07-21 09:11:40,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 2572 transitions, 75880 flow [2022-07-21 09:11:43,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2572 transitions, 75728 flow, removed 22 selfloop flow, removed 11 redundant places. [2022-07-21 09:11:43,683 INFO L242 Difference]: Finished difference. Result has 544 places, 2515 transitions, 75594 flow [2022-07-21 09:11:43,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=60859, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=75594, PETRI_PLACES=544, PETRI_TRANSITIONS=2515} [2022-07-21 09:11:43,686 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 470 predicate places. [2022-07-21 09:11:43,686 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 2515 transitions, 75594 flow [2022-07-21 09:11:43,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:43,687 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:43,687 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:43,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:43,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:11:43,903 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -759106099, now seen corresponding path program 10 times [2022-07-21 09:11:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142101421] [2022-07-21 09:11:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:44,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:44,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142101421] [2022-07-21 09:11:44,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142101421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442300903] [2022-07-21 09:11:44,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:11:44,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:44,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:44,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:11:44,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:11:44,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:44,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:11:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:44,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:44,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442300903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:44,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:44,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-21 09:11:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155242616] [2022-07-21 09:11:44,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:11:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:11:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:11:44,763 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:11:44,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 2515 transitions, 75594 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:44,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:44,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:11:44,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:52,873 INFO L129 PetriNetUnfolder]: 2888/9474 cut-off events. [2022-07-21 09:11:52,873 INFO L130 PetriNetUnfolder]: For 286327/286354 co-relation queries the response was YES. [2022-07-21 09:11:53,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87945 conditions, 9474 events. 2888/9474 cut-off events. For 286327/286354 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 104140 event pairs, 269 based on Foata normal form. 9/9456 useless extension candidates. Maximal degree in co-relation 87797. Up to 1720 conditions per place. [2022-07-21 09:11:53,176 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 632 selfloop transitions, 2339 changer transitions 11/3052 dead transitions. [2022-07-21 09:11:53,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 3052 transitions, 97974 flow [2022-07-21 09:11:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 09:11:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-21 09:11:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2629 transitions. [2022-07-21 09:11:53,180 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7824404761904762 [2022-07-21 09:11:53,180 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2629 transitions. [2022-07-21 09:11:53,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2629 transitions. [2022-07-21 09:11:53,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:53,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2629 transitions. [2022-07-21 09:11:53,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:53,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:53,188 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:53,188 INFO L186 Difference]: Start difference. First operand has 544 places, 2515 transitions, 75594 flow. Second operand 40 states and 2629 transitions. [2022-07-21 09:11:53,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 3052 transitions, 97974 flow [2022-07-21 09:11:58,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 3052 transitions, 97580 flow, removed 82 selfloop flow, removed 12 redundant places. [2022-07-21 09:11:58,700 INFO L242 Difference]: Finished difference. Result has 586 places, 2999 transitions, 99666 flow [2022-07-21 09:11:58,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=75243, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1871, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=99666, PETRI_PLACES=586, PETRI_TRANSITIONS=2999} [2022-07-21 09:11:58,703 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 512 predicate places. [2022-07-21 09:11:58,703 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 2999 transitions, 99666 flow [2022-07-21 09:11:58,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:58,704 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:58,704 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:58,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 09:11:58,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:11:58,904 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash 704273387, now seen corresponding path program 11 times [2022-07-21 09:11:58,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:58,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985253047] [2022-07-21 09:11:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:58,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:59,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:59,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985253047] [2022-07-21 09:11:59,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985253047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:59,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911066151] [2022-07-21 09:11:59,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:11:59,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:59,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:59,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:59,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:11:59,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:11:59,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:59,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:11:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:59,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:37,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911066151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:12:37,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:12:37,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:12:37,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484857494] [2022-07-21 09:12:37,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:12:37,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:12:37,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:37,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:12:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:12:37,636 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:12:37,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 2999 transitions, 99666 flow. Second operand has 19 states, 19 states have (on average 64.42105263157895) internal successors, (1224), 19 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:37,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:37,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:12:37,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:47,744 INFO L129 PetriNetUnfolder]: 3092/9846 cut-off events. [2022-07-21 09:12:47,745 INFO L130 PetriNetUnfolder]: For 361400/361432 co-relation queries the response was YES. [2022-07-21 09:12:47,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101458 conditions, 9846 events. 3092/9846 cut-off events. For 361400/361432 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 107951 event pairs, 47 based on Foata normal form. 47/9871 useless extension candidates. Maximal degree in co-relation 101294. Up to 1861 conditions per place. [2022-07-21 09:12:47,959 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 302 selfloop transitions, 2957 changer transitions 0/3329 dead transitions. [2022-07-21 09:12:47,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 3329 transitions, 116906 flow [2022-07-21 09:12:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 09:12:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-21 09:12:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2896 transitions. [2022-07-21 09:12:47,963 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7835497835497836 [2022-07-21 09:12:47,964 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2896 transitions. [2022-07-21 09:12:47,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2896 transitions. [2022-07-21 09:12:47,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:47,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2896 transitions. [2022-07-21 09:12:47,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 65.81818181818181) internal successors, (2896), 44 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:47,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 84.0) internal successors, (3780), 45 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:47,972 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 84.0) internal successors, (3780), 45 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:47,972 INFO L186 Difference]: Start difference. First operand has 586 places, 2999 transitions, 99666 flow. Second operand 44 states and 2896 transitions. [2022-07-21 09:12:47,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 3329 transitions, 116906 flow [2022-07-21 09:12:54,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3329 transitions, 115731 flow, removed 209 selfloop flow, removed 17 redundant places. [2022-07-21 09:12:54,929 INFO L242 Difference]: Finished difference. Result has 614 places, 3282 transitions, 117795 flow [2022-07-21 09:12:54,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=98067, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=117795, PETRI_PLACES=614, PETRI_TRANSITIONS=3282} [2022-07-21 09:12:54,932 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 540 predicate places. [2022-07-21 09:12:54,932 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 3282 transitions, 117795 flow [2022-07-21 09:12:54,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.42105263157895) internal successors, (1224), 19 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:54,932 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:54,932 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:54,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:12:55,132 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,SelfDestructingSolverStorable14 [2022-07-21 09:12:55,133 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:12:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:55,133 INFO L85 PathProgramCache]: Analyzing trace with hash -604446607, now seen corresponding path program 12 times [2022-07-21 09:12:55,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:55,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84481655] [2022-07-21 09:12:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:55,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:55,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:55,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84481655] [2022-07-21 09:12:55,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84481655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:55,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79558432] [2022-07-21 09:12:55,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:12:55,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:55,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:55,244 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:12:55,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:12:55,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 09:12:55,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:12:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:55,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:55,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79558432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:12:55,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:12:55,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-21 09:12:55,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939329115] [2022-07-21 09:12:55,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:12:55,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:12:55,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:55,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:12:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:12:55,909 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:12:55,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 3282 transitions, 117795 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:55,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:55,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:12:55,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:07,751 INFO L129 PetriNetUnfolder]: 3222/10257 cut-off events. [2022-07-21 09:13:07,751 INFO L130 PetriNetUnfolder]: For 430924/430954 co-relation queries the response was YES. [2022-07-21 09:13:08,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113206 conditions, 10257 events. 3222/10257 cut-off events. For 430924/430954 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 112855 event pairs, 96 based on Foata normal form. 2/10220 useless extension candidates. Maximal degree in co-relation 113038. Up to 1975 conditions per place. [2022-07-21 09:13:08,217 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 999 selfloop transitions, 2463 changer transitions 3/3535 dead transitions. [2022-07-21 09:13:08,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 3535 transitions, 133585 flow [2022-07-21 09:13:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:13:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:13:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2022-07-21 09:13:08,219 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2022-07-21 09:13:08,220 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2022-07-21 09:13:08,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2022-07-21 09:13:08,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:08,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2022-07-21 09:13:08,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.76666666666667) internal successors, (1973), 30 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,224 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,225 INFO L186 Difference]: Start difference. First operand has 614 places, 3282 transitions, 117795 flow. Second operand 30 states and 1973 transitions. [2022-07-21 09:13:08,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 3535 transitions, 133585 flow [2022-07-21 09:13:17,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 3535 transitions, 132967 flow, removed 100 selfloop flow, removed 18 redundant places. [2022-07-21 09:13:17,407 INFO L242 Difference]: Finished difference. Result has 632 places, 3504 transitions, 131162 flow [2022-07-21 09:13:17,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=117235, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=131162, PETRI_PLACES=632, PETRI_TRANSITIONS=3504} [2022-07-21 09:13:17,410 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 558 predicate places. [2022-07-21 09:13:17,410 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 3504 transitions, 131162 flow [2022-07-21 09:13:17,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:17,411 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:17,411 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:17,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:17,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:17,617 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:17,618 INFO L85 PathProgramCache]: Analyzing trace with hash 536604281, now seen corresponding path program 13 times [2022-07-21 09:13:17,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:17,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973571583] [2022-07-21 09:13:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:17,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:17,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973571583] [2022-07-21 09:13:17,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973571583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656153229] [2022-07-21 09:13:17,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:13:17,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:17,740 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:17,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:13:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:13:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:17,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:18,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656153229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:18,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:18,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-21 09:13:18,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142376433] [2022-07-21 09:13:18,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:13:18,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:18,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:13:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:13:18,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:13:18,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 3504 transitions, 131162 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:18,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:18,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:13:18,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:36,220 INFO L129 PetriNetUnfolder]: 3418/10561 cut-off events. [2022-07-21 09:13:36,220 INFO L130 PetriNetUnfolder]: For 473269/473300 co-relation queries the response was YES. [2022-07-21 09:13:36,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123093 conditions, 10561 events. 3418/10561 cut-off events. For 473269/473300 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 115208 event pairs, 100 based on Foata normal form. 4/10526 useless extension candidates. Maximal degree in co-relation 122917. Up to 2111 conditions per place. [2022-07-21 09:13:36,482 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 600 selfloop transitions, 3113 changer transitions 6/3789 dead transitions. [2022-07-21 09:13:36,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 3789 transitions, 148411 flow [2022-07-21 09:13:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 09:13:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-21 09:13:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3013 transitions. [2022-07-21 09:13:36,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2022-07-21 09:13:36,484 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3013 transitions. [2022-07-21 09:13:36,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3013 transitions. [2022-07-21 09:13:36,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:36,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3013 transitions. [2022-07-21 09:13:36,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 65.5) internal successors, (3013), 46 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,493 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,493 INFO L186 Difference]: Start difference. First operand has 632 places, 3504 transitions, 131162 flow. Second operand 46 states and 3013 transitions. [2022-07-21 09:13:36,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 3789 transitions, 148411 flow [2022-07-21 09:13:45,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 3789 transitions, 147739 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-07-21 09:13:46,098 INFO L242 Difference]: Finished difference. Result has 665 places, 3754 transitions, 148129 flow [2022-07-21 09:13:46,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=130318, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2855, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=148129, PETRI_PLACES=665, PETRI_TRANSITIONS=3754} [2022-07-21 09:13:46,102 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 591 predicate places. [2022-07-21 09:13:46,102 INFO L495 AbstractCegarLoop]: Abstraction has has 665 places, 3754 transitions, 148129 flow [2022-07-21 09:13:46,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:46,103 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:46,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:46,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:13:46,319 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1706854467, now seen corresponding path program 14 times [2022-07-21 09:13:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276255318] [2022-07-21 09:13:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:46,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276255318] [2022-07-21 09:13:46,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276255318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868974135] [2022-07-21 09:13:46,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:46,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:46,432 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:46,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:13:46,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:46,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:46,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:13:46,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:46,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:46,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868974135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:46,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:46,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-07-21 09:13:46,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781334437] [2022-07-21 09:13:46,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:13:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:13:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:13:46,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-21 09:13:46,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 665 places, 3754 transitions, 148129 flow. Second operand has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:46,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-21 09:13:46,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:09,578 INFO L129 PetriNetUnfolder]: 4301/12895 cut-off events. [2022-07-21 09:14:09,579 INFO L130 PetriNetUnfolder]: For 656033/656033 co-relation queries the response was YES. [2022-07-21 09:14:09,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164805 conditions, 12895 events. 4301/12895 cut-off events. For 656033/656033 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 143874 event pairs, 273 based on Foata normal form. 108/12967 useless extension candidates. Maximal degree in co-relation 164623. Up to 3174 conditions per place. [2022-07-21 09:14:09,887 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1561 selfloop transitions, 3626 changer transitions 18/5246 dead transitions. [2022-07-21 09:14:09,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 5246 transitions, 215224 flow [2022-07-21 09:14:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 09:14:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-21 09:14:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3957 transitions. [2022-07-21 09:14:09,891 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6634808853118712 [2022-07-21 09:14:09,891 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3957 transitions. [2022-07-21 09:14:09,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3957 transitions. [2022-07-21 09:14:09,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:09,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3957 transitions. [2022-07-21 09:14:09,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 55.732394366197184) internal successors, (3957), 71 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:09,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:09,902 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:09,903 INFO L186 Difference]: Start difference. First operand has 665 places, 3754 transitions, 148129 flow. Second operand 71 states and 3957 transitions. [2022-07-21 09:14:09,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 5246 transitions, 215224 flow [2022-07-21 09:14:23,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 5246 transitions, 211527 flow, removed 163 selfloop flow, removed 27 redundant places. [2022-07-21 09:14:23,981 INFO L242 Difference]: Finished difference. Result has 748 places, 4937 transitions, 206743 flow [2022-07-21 09:14:23,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=144524, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=206743, PETRI_PLACES=748, PETRI_TRANSITIONS=4937} [2022-07-21 09:14:23,985 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 674 predicate places. [2022-07-21 09:14:23,985 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4937 transitions, 206743 flow [2022-07-21 09:14:23,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:23,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:23,985 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:24,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:24,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:14:24,186 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1970329197, now seen corresponding path program 15 times [2022-07-21 09:14:24,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:24,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284233989] [2022-07-21 09:14:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284233989] [2022-07-21 09:14:24,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284233989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970692097] [2022-07-21 09:14:24,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:14:24,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:24,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:24,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:14:24,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:14:24,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:14:24,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:24,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:25,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970692097] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:25,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:25,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-21 09:14:25,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141370243] [2022-07-21 09:14:25,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:14:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:25,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:14:25,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:14:25,013 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-21 09:14:25,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 4937 transitions, 206743 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:25,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:25,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-21 09:14:25,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:52,974 INFO L129 PetriNetUnfolder]: 4519/13126 cut-off events. [2022-07-21 09:14:52,974 INFO L130 PetriNetUnfolder]: For 797599/797640 co-relation queries the response was YES. [2022-07-21 09:14:53,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184082 conditions, 13126 events. 4519/13126 cut-off events. For 797599/797640 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 144805 event pairs, 474 based on Foata normal form. 6/12984 useless extension candidates. Maximal degree in co-relation 183857. Up to 3145 conditions per place. [2022-07-21 09:14:53,654 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2000 selfloop transitions, 3159 changer transitions 8/5295 dead transitions. [2022-07-21 09:14:53,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 5295 transitions, 233117 flow [2022-07-21 09:14:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 09:14:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 09:14:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1665 transitions. [2022-07-21 09:14:53,656 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-07-21 09:14:53,656 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1665 transitions. [2022-07-21 09:14:53,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1665 transitions. [2022-07-21 09:14:53,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:53,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1665 transitions. [2022-07-21 09:14:53,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.6) internal successors, (1665), 25 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:53,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:53,660 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:53,660 INFO L186 Difference]: Start difference. First operand has 748 places, 4937 transitions, 206743 flow. Second operand 25 states and 1665 transitions. [2022-07-21 09:14:53,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 5295 transitions, 233117 flow