./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP --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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:10,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:10,207 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:25:10,218 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:10,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:10,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:10,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:10,270 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:10,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:10,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:10,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:10,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:10,283 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:10,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:10,286 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:25:10,286 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:10,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:10,287 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:10,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:10,288 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:25:10,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:10,290 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:25:10,290 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:10,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:25:10,291 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:10,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:10,292 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:10,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:10,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:10,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:10,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:10,294 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:25:10,294 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:10,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:10,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:10,295 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:25:10,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:10,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:10,296 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:10,296 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 [2023-11-06 22:25:10,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:10,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:10,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:10,652 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:10,655 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:10,656 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2023-11-06 22:25:14,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:25:14,361 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:25:14,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2023-11-06 22:25:14,393 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/data/89013519f/f1209f2ce8c848c3a59e6f2adcdde77e/FLAGb0a0bae05 [2023-11-06 22:25:14,410 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/data/89013519f/f1209f2ce8c848c3a59e6f2adcdde77e [2023-11-06 22:25:14,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:25:14,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:25:14,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:14,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:25:14,426 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:25:14,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:14" (1/1) ... [2023-11-06 22:25:14,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48df5baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:14, skipping insertion in model container [2023-11-06 22:25:14,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:14" (1/1) ... [2023-11-06 22:25:14,516 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:25:14,764 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 22:25:14,916 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2023-11-06 22:25:14,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:14,946 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:25:14,977 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 22:25:15,020 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2023-11-06 22:25:15,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:15,060 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:25:15,060 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:25:15,060 WARN L672 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:25:15,070 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:25:15,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15 WrapperNode [2023-11-06 22:25:15,071 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:15,074 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:15,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:25:15,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:25:15,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,157 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2023-11-06 22:25:15,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:15,158 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:25:15,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:25:15,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:25:15,170 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,197 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,205 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,206 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:25:15,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:25:15,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:25:15,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:25:15,223 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (1/1) ... [2023-11-06 22:25:15,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:15,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:15,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:25:15,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed600e5c-b606-4e90-84b0-b66bfbeabc30/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:25:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:25:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:25:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:25:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:25:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:25:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:25:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:25:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:25:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:25:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:25:15,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:25:15,336 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:25:15,535 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:25:15,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:25:15,676 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:25:15,697 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:25:15,698 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:25:15,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:15 BoogieIcfgContainer [2023-11-06 22:25:15,701 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:25:15,704 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:25:15,704 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:25:15,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:25:15,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:25:14" (1/3) ... [2023-11-06 22:25:15,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e307cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:15, skipping insertion in model container [2023-11-06 22:25:15,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:15" (2/3) ... [2023-11-06 22:25:15,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e307cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:15, skipping insertion in model container [2023-11-06 22:25:15,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:15" (3/3) ... [2023-11-06 22:25:15,711 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-11-06 22:25:15,722 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:25:15,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:25:15,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:25:15,736 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:25:15,778 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:15,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 70 flow [2023-11-06 22:25:15,861 INFO L124 PetriNetUnfolderBase]: 2/44 cut-off events. [2023-11-06 22:25:15,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:15,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 44 events. 2/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-11-06 22:25:15,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 70 flow [2023-11-06 22:25:15,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 70 flow [2023-11-06 22:25:15,874 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:15,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 33 transitions, 70 flow [2023-11-06 22:25:15,891 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 33 transitions, 70 flow [2023-11-06 22:25:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 70 flow [2023-11-06 22:25:15,907 INFO L124 PetriNetUnfolderBase]: 2/44 cut-off events. [2023-11-06 22:25:15,907 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:15,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 44 events. 2/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-11-06 22:25:15,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 196 [2023-11-06 22:25:17,257 INFO L134 LiptonReduction]: Checked pairs total: 149 [2023-11-06 22:25:17,258 INFO L136 LiptonReduction]: Total number of compositions: 27 [2023-11-06 22:25:17,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:17,299 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@310ce58a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:17,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:25:17,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:17,307 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-06 22:25:17,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:17,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:17,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:17,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:17,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash 4641793, now seen corresponding path program 1 times [2023-11-06 22:25:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:17,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015588079] [2023-11-06 22:25:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:17,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:17,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015588079] [2023-11-06 22:25:17,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015588079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:17,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:17,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141730935] [2023-11-06 22:25:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:17,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:17,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:17,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2023-11-06 22:25:17,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:17,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:17,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2023-11-06 22:25:17,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:17,839 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-06 22:25:17,839 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:17,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2023-11-06 22:25:17,841 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2023-11-06 22:25:17,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-06 22:25:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-06 22:25:17,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-06 22:25:17,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-06 22:25:17,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-06 22:25:17,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:17,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-06 22:25:17,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:17,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:17,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:17,883 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 3 states and 88 transitions. [2023-11-06 22:25:17,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-06 22:25:17,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:17,889 INFO L231 Difference]: Finished difference. Result has 11 places, 6 transitions, 20 flow [2023-11-06 22:25:17,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=6} [2023-11-06 22:25:17,899 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, 0 predicate places. [2023-11-06 22:25:17,899 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 6 transitions, 20 flow [2023-11-06 22:25:17,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:17,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:17,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:25:17,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:25:17,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:17,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash 165806163, now seen corresponding path program 1 times [2023-11-06 22:25:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273952404] [2023-11-06 22:25:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:17,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:17,955 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:17,989 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:17,990 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:17,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:25:17,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:25:17,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:25:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:25:18,000 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:25:18,005 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:18,005 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:25:18,034 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:18,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 92 flow [2023-11-06 22:25:18,070 INFO L124 PetriNetUnfolderBase]: 3/65 cut-off events. [2023-11-06 22:25:18,071 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:25:18,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 3/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 45. Up to 6 conditions per place. [2023-11-06 22:25:18,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 41 transitions, 92 flow [2023-11-06 22:25:18,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 41 transitions, 92 flow [2023-11-06 22:25:18,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:18,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 41 transitions, 92 flow [2023-11-06 22:25:18,080 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 41 transitions, 92 flow [2023-11-06 22:25:18,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 92 flow [2023-11-06 22:25:18,102 INFO L124 PetriNetUnfolderBase]: 3/65 cut-off events. [2023-11-06 22:25:18,102 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:25:18,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 3/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 45. Up to 6 conditions per place. [2023-11-06 22:25:18,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-06 22:25:19,106 INFO L134 LiptonReduction]: Checked pairs total: 1003 [2023-11-06 22:25:19,106 INFO L136 LiptonReduction]: Total number of compositions: 28 [2023-11-06 22:25:19,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:19,110 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@310ce58a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:19,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:25:19,113 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:19,114 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-06 22:25:19,114 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:19,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:19,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:19,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:25:19,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 7042858, now seen corresponding path program 1 times [2023-11-06 22:25:19,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:19,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474815707] [2023-11-06 22:25:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:19,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:19,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474815707] [2023-11-06 22:25:19,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474815707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:19,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:19,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:19,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81173919] [2023-11-06 22:25:19,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:19,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:19,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:19,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 69 [2023-11-06 22:25:19,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:19,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:19,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 69 [2023-11-06 22:25:19,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:19,317 INFO L124 PetriNetUnfolderBase]: 22/66 cut-off events. [2023-11-06 22:25:19,318 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 22:25:19,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 66 events. 22/66 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 217 event pairs, 7 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 51. Up to 32 conditions per place. [2023-11-06 22:25:19,319 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 13 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-06 22:25:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 21 transitions, 89 flow [2023-11-06 22:25:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2023-11-06 22:25:19,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314009661835749 [2023-11-06 22:25:19,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2023-11-06 22:25:19,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2023-11-06 22:25:19,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:19,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2023-11-06 22:25:19,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:19,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:19,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:19,327 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 42 flow. Second operand 3 states and 110 transitions. [2023-11-06 22:25:19,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 21 transitions, 89 flow [2023-11-06 22:25:19,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 89 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:19,328 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 61 flow [2023-11-06 22:25:19,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-11-06 22:25:19,330 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2023-11-06 22:25:19,330 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 61 flow [2023-11-06 22:25:19,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:19,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:19,331 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:25:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:25:19,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:25:19,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -207707537, now seen corresponding path program 1 times [2023-11-06 22:25:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248194713] [2023-11-06 22:25:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:19,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:19,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:19,366 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:19,366 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:25:19,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:25:19,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:25:19,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:25:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:25:19,368 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:25:19,368 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:19,369 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:25:19,387 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:19,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 116 flow [2023-11-06 22:25:19,407 INFO L124 PetriNetUnfolderBase]: 4/86 cut-off events. [2023-11-06 22:25:19,407 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:25:19,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 4/86 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 69. Up to 8 conditions per place. [2023-11-06 22:25:19,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 49 transitions, 116 flow [2023-11-06 22:25:19,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 49 transitions, 116 flow [2023-11-06 22:25:19,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:19,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 49 transitions, 116 flow [2023-11-06 22:25:19,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 49 transitions, 116 flow [2023-11-06 22:25:19,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 116 flow [2023-11-06 22:25:19,441 INFO L124 PetriNetUnfolderBase]: 4/86 cut-off events. [2023-11-06 22:25:19,442 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:25:19,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 4/86 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 69. Up to 8 conditions per place. [2023-11-06 22:25:19,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 924 [2023-11-06 22:25:20,556 INFO L134 LiptonReduction]: Checked pairs total: 1864 [2023-11-06 22:25:20,556 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-06 22:25:20,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:20,561 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@310ce58a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:20,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:25:20,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:20,573 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:25:20,574 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:20,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:20,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:20,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:25:20,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 9754611, now seen corresponding path program 1 times [2023-11-06 22:25:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:20,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466370380] [2023-11-06 22:25:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:20,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466370380] [2023-11-06 22:25:20,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466370380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:20,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:20,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568549894] [2023-11-06 22:25:20,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:20,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:20,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:20,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 81 [2023-11-06 22:25:20,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:20,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:20,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 81 [2023-11-06 22:25:20,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:20,922 INFO L124 PetriNetUnfolderBase]: 162/314 cut-off events. [2023-11-06 22:25:20,925 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-06 22:25:20,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 314 events. 162/314 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1399 event pairs, 41 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 136. Up to 226 conditions per place. [2023-11-06 22:25:20,935 INFO L140 encePairwiseOnDemand]: 73/81 looper letters, 19 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-11-06 22:25:20,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 134 flow [2023-11-06 22:25:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-11-06 22:25:20,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2023-11-06 22:25:20,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-11-06 22:25:20,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-11-06 22:25:20,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:20,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-11-06 22:25:20,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:20,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:20,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:20,953 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 130 transitions. [2023-11-06 22:25:20,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 134 flow [2023-11-06 22:25:20,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 130 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:20,957 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 86 flow [2023-11-06 22:25:20,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-11-06 22:25:20,960 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-11-06 22:25:20,960 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 86 flow [2023-11-06 22:25:20,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:20,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:20,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:20,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:25:20,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:25:20,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1743441747, now seen corresponding path program 1 times [2023-11-06 22:25:20,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:20,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851372058] [2023-11-06 22:25:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:25:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851372058] [2023-11-06 22:25:21,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851372058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:21,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:21,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:21,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665441722] [2023-11-06 22:25:21,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:21,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:21,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:21,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 81 [2023-11-06 22:25:21,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:21,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:21,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 81 [2023-11-06 22:25:21,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:21,159 INFO L124 PetriNetUnfolderBase]: 279/467 cut-off events. [2023-11-06 22:25:21,159 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-06 22:25:21,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 467 events. 279/467 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2056 event pairs, 57 based on Foata normal form. 46/505 useless extension candidates. Maximal degree in co-relation 816. Up to 392 conditions per place. [2023-11-06 22:25:21,165 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-06 22:25:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 154 flow [2023-11-06 22:25:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-06 22:25:21,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267489711934157 [2023-11-06 22:25:21,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-06 22:25:21,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-06 22:25:21,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:21,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-06 22:25:21,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:21,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:21,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:21,171 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 86 flow. Second operand 3 states and 128 transitions. [2023-11-06 22:25:21,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 154 flow [2023-11-06 22:25:21,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:21,174 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 91 flow [2023-11-06 22:25:21,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-06 22:25:21,175 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-11-06 22:25:21,175 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 91 flow [2023-11-06 22:25:21,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:21,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:21,176 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:25:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:25:21,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:25:21,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1273229235, now seen corresponding path program 1 times [2023-11-06 22:25:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:21,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386975246] [2023-11-06 22:25:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:21,194 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:21,211 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:21,211 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:21,212 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:25:21,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:25:21,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:25:21,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:25:21,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:25:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:25:21,213 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:25:21,214 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:21,214 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:25:21,233 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:21,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 57 transitions, 142 flow [2023-11-06 22:25:21,258 INFO L124 PetriNetUnfolderBase]: 5/107 cut-off events. [2023-11-06 22:25:21,259 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:25:21,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 107 events. 5/107 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 94. Up to 10 conditions per place. [2023-11-06 22:25:21,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 57 transitions, 142 flow [2023-11-06 22:25:21,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 57 transitions, 142 flow [2023-11-06 22:25:21,262 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:21,262 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 57 transitions, 142 flow [2023-11-06 22:25:21,262 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 57 transitions, 142 flow [2023-11-06 22:25:21,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 57 transitions, 142 flow [2023-11-06 22:25:21,284 INFO L124 PetriNetUnfolderBase]: 5/107 cut-off events. [2023-11-06 22:25:21,284 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:25:21,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 107 events. 5/107 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 94. Up to 10 conditions per place. [2023-11-06 22:25:21,288 INFO L119 LiptonReduction]: Number of co-enabled transitions 1456 [2023-11-06 22:25:22,557 INFO L134 LiptonReduction]: Checked pairs total: 3052 [2023-11-06 22:25:22,557 INFO L136 LiptonReduction]: Total number of compositions: 36 [2023-11-06 22:25:22,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:22,560 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@310ce58a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:22,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:25:22,561 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:22,562 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:25:22,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:22,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:22,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:22,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:25:22,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash 12890544, now seen corresponding path program 1 times [2023-11-06 22:25:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:22,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927529879] [2023-11-06 22:25:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:22,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:22,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927529879] [2023-11-06 22:25:22,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927529879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:22,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:22,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:22,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986407368] [2023-11-06 22:25:22,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:22,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:22,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:22,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2023-11-06 22:25:22,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:22,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:22,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2023-11-06 22:25:22,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:22,885 INFO L124 PetriNetUnfolderBase]: 1032/1602 cut-off events. [2023-11-06 22:25:22,885 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2023-11-06 22:25:22,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 1602 events. 1032/1602 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8271 event pairs, 269 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 666. Up to 1390 conditions per place. [2023-11-06 22:25:22,904 INFO L140 encePairwiseOnDemand]: 83/93 looper letters, 25 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-11-06 22:25:22,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 183 flow [2023-11-06 22:25:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-06 22:25:22,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2023-11-06 22:25:22,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-06 22:25:22,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-06 22:25:22,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:22,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-06 22:25:22,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:22,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:22,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:22,909 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 80 flow. Second operand 3 states and 150 transitions. [2023-11-06 22:25:22,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 183 flow [2023-11-06 22:25:22,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 171 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:22,913 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 111 flow [2023-11-06 22:25:22,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-06 22:25:22,914 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-06 22:25:22,914 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 111 flow [2023-11-06 22:25:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:22,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:22,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:25:22,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:25:22,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:22,916 INFO L85 PathProgramCache]: Analyzing trace with hash 117392779, now seen corresponding path program 1 times [2023-11-06 22:25:22,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:22,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711937022] [2023-11-06 22:25:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:25:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711937022] [2023-11-06 22:25:22,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711937022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:22,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888256831] [2023-11-06 22:25:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:22,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:22,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2023-11-06 22:25:22,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:22,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:22,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2023-11-06 22:25:22,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:23,348 INFO L124 PetriNetUnfolderBase]: 1623/2343 cut-off events. [2023-11-06 22:25:23,348 INFO L125 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2023-11-06 22:25:23,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5821 conditions, 2343 events. 1623/2343 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11377 event pairs, 347 based on Foata normal form. 342/2664 useless extension candidates. Maximal degree in co-relation 4266. Up to 2160 conditions per place. [2023-11-06 22:25:23,373 INFO L140 encePairwiseOnDemand]: 85/93 looper letters, 30 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-11-06 22:25:23,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 202 flow [2023-11-06 22:25:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-06 22:25:23,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304659498207885 [2023-11-06 22:25:23,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-06 22:25:23,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-06 22:25:23,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:23,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-06 22:25:23,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:23,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:23,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:23,378 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 111 flow. Second operand 3 states and 148 transitions. [2023-11-06 22:25:23,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 202 flow [2023-11-06 22:25:23,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:23,381 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 118 flow [2023-11-06 22:25:23,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-06 22:25:23,382 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-11-06 22:25:23,382 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 118 flow [2023-11-06 22:25:23,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:23,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:23,383 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:23,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:25:23,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:25:23,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash -352863067, now seen corresponding path program 1 times [2023-11-06 22:25:23,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:23,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612522579] [2023-11-06 22:25:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:23,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:23,402 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:23,416 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:23,416 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:23,417 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 22:25:23,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 22:25:23,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 22:25:23,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 22:25:23,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 22:25:23,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 22:25:23,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:25:23,418 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:25:23,419 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:23,419 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-06 22:25:23,443 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:23,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 65 transitions, 170 flow [2023-11-06 22:25:23,466 INFO L124 PetriNetUnfolderBase]: 6/128 cut-off events. [2023-11-06 22:25:23,466 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:25:23,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 128 events. 6/128 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 190 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 120. Up to 12 conditions per place. [2023-11-06 22:25:23,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 65 transitions, 170 flow [2023-11-06 22:25:23,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 65 transitions, 170 flow [2023-11-06 22:25:23,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:23,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 65 transitions, 170 flow [2023-11-06 22:25:23,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 65 transitions, 170 flow [2023-11-06 22:25:23,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 65 transitions, 170 flow [2023-11-06 22:25:23,489 INFO L124 PetriNetUnfolderBase]: 6/128 cut-off events. [2023-11-06 22:25:23,489 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:25:23,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 128 events. 6/128 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 190 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 120. Up to 12 conditions per place. [2023-11-06 22:25:23,493 INFO L119 LiptonReduction]: Number of co-enabled transitions 2100 [2023-11-06 22:25:24,742 INFO L134 LiptonReduction]: Checked pairs total: 5468 [2023-11-06 22:25:24,743 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-11-06 22:25:24,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:24,745 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@310ce58a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:24,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:25:24,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:24,747 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:25:24,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:24,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:24,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:24,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:25:24,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash 16370893, now seen corresponding path program 1 times [2023-11-06 22:25:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:24,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263524478] [2023-11-06 22:25:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:24,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:24,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263524478] [2023-11-06 22:25:24,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263524478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:24,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:24,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:24,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559261818] [2023-11-06 22:25:24,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:24,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:24,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:24,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:24,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:24,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 105 [2023-11-06 22:25:24,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:24,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:24,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 105 [2023-11-06 22:25:24,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:25,942 INFO L124 PetriNetUnfolderBase]: 5980/8248 cut-off events. [2023-11-06 22:25:25,942 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2023-11-06 22:25:25,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17789 conditions, 8248 events. 5980/8248 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 45233 event pairs, 1759 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 3476. Up to 7756 conditions per place. [2023-11-06 22:25:26,106 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 31 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-11-06 22:25:26,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 236 flow [2023-11-06 22:25:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-11-06 22:25:26,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-11-06 22:25:26,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-11-06 22:25:26,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-11-06 22:25:26,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:26,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-11-06 22:25:26,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,112 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 102 flow. Second operand 3 states and 170 transitions. [2023-11-06 22:25:26,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 236 flow [2023-11-06 22:25:26,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 212 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:26,116 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 136 flow [2023-11-06 22:25:26,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-06 22:25:26,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-11-06 22:25:26,117 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 136 flow [2023-11-06 22:25:26,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:26,117 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:26,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:25:26,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:25:26,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:26,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1366666953, now seen corresponding path program 1 times [2023-11-06 22:25:26,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:26,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465724609] [2023-11-06 22:25:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:26,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:25:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465724609] [2023-11-06 22:25:26,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465724609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:26,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:26,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729478040] [2023-11-06 22:25:26,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:26,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 105 [2023-11-06 22:25:26,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:26,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 105 [2023-11-06 22:25:26,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:27,595 INFO L124 PetriNetUnfolderBase]: 8535/11343 cut-off events. [2023-11-06 22:25:27,595 INFO L125 PetriNetUnfolderBase]: For 2720/2720 co-relation queries the response was YES. [2023-11-06 22:25:27,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27920 conditions, 11343 events. 8535/11343 cut-off events. For 2720/2720 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57597 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 20684. Up to 10912 conditions per place. [2023-11-06 22:25:27,701 INFO L140 encePairwiseOnDemand]: 95/105 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-11-06 22:25:27,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 250 flow [2023-11-06 22:25:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-06 22:25:27,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-06 22:25:27,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-06 22:25:27,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-06 22:25:27,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:27,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-06 22:25:27,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,779 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 136 flow. Second operand 3 states and 168 transitions. [2023-11-06 22:25:27,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 250 flow [2023-11-06 22:25:27,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:27,785 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 145 flow [2023-11-06 22:25:27,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-06 22:25:27,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-06 22:25:27,786 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 145 flow [2023-11-06 22:25:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:27,787 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:25:27,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:25:27,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1817445209, now seen corresponding path program 1 times [2023-11-06 22:25:27,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:27,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363441084] [2023-11-06 22:25:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:27,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:27,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:27,820 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:27,820 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 22:25:27,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-06 22:25:27,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-06 22:25:27,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-06 22:25:27,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-06 22:25:27,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-06 22:25:27,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-06 22:25:27,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:25:27,822 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:25:27,823 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:27,823 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-06 22:25:27,845 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:27,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 200 flow [2023-11-06 22:25:27,863 INFO L124 PetriNetUnfolderBase]: 7/149 cut-off events. [2023-11-06 22:25:27,864 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-06 22:25:27,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 149 events. 7/149 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 226 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 147. Up to 14 conditions per place. [2023-11-06 22:25:27,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 73 transitions, 200 flow [2023-11-06 22:25:27,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 73 transitions, 200 flow [2023-11-06 22:25:27,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:27,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 73 transitions, 200 flow [2023-11-06 22:25:27,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 73 transitions, 200 flow [2023-11-06 22:25:27,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 200 flow [2023-11-06 22:25:27,880 INFO L124 PetriNetUnfolderBase]: 7/149 cut-off events. [2023-11-06 22:25:27,880 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-06 22:25:27,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 149 events. 7/149 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 226 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 147. Up to 14 conditions per place. [2023-11-06 22:25:27,885 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2023-11-06 22:25:29,312 INFO L134 LiptonReduction]: Checked pairs total: 6633 [2023-11-06 22:25:29,313 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-11-06 22:25:29,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:29,315 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@310ce58a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:29,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-06 22:25:29,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:29,316 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:25:29,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:29,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:29,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:29,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-06 22:25:29,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash 20212962, now seen corresponding path program 1 times [2023-11-06 22:25:29,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:29,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118589346] [2023-11-06 22:25:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:29,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118589346] [2023-11-06 22:25:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118589346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672205252] [2023-11-06 22:25:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:29,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 117 [2023-11-06 22:25:29,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:29,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:29,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 117 [2023-11-06 22:25:29,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:34,967 INFO L124 PetriNetUnfolderBase]: 32246/41520 cut-off events. [2023-11-06 22:25:34,967 INFO L125 PetriNetUnfolderBase]: For 20783/20783 co-relation queries the response was YES. [2023-11-06 22:25:35,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89881 conditions, 41520 events. 32246/41520 cut-off events. For 20783/20783 co-relation queries the response was YES. Maximal size of possible extension queue 2609. Compared 232292 event pairs, 10687 based on Foata normal form. 0/29993 useless extension candidates. Maximal degree in co-relation 18033. Up to 40404 conditions per place. [2023-11-06 22:25:35,342 INFO L140 encePairwiseOnDemand]: 103/117 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-11-06 22:25:35,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 293 flow [2023-11-06 22:25:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-11-06 22:25:35,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413105413105413 [2023-11-06 22:25:35,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-11-06 22:25:35,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-11-06 22:25:35,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:35,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-11-06 22:25:35,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:35,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:35,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:35,347 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 126 flow. Second operand 3 states and 190 transitions. [2023-11-06 22:25:35,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 293 flow [2023-11-06 22:25:35,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 253 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:35,366 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 161 flow [2023-11-06 22:25:35,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-06 22:25:35,368 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-06 22:25:35,368 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 161 flow [2023-11-06 22:25:35,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:35,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:35,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:35,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:25:35,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-06 22:25:35,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1981518788, now seen corresponding path program 1 times [2023-11-06 22:25:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140997758] [2023-11-06 22:25:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:35,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:25:35,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:35,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140997758] [2023-11-06 22:25:35,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140997758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:35,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:35,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:35,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48612668] [2023-11-06 22:25:35,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:35,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:35,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:35,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:35,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 117 [2023-11-06 22:25:35,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:35,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:35,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 117 [2023-11-06 22:25:35,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:40,995 INFO L124 PetriNetUnfolderBase]: 42327/53407 cut-off events. [2023-11-06 22:25:40,995 INFO L125 PetriNetUnfolderBase]: For 13628/13628 co-relation queries the response was YES. [2023-11-06 22:25:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130245 conditions, 53407 events. 42327/53407 cut-off events. For 13628/13628 co-relation queries the response was YES. Maximal size of possible extension queue 2248. Compared 279808 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 96806. Up to 52416 conditions per place. [2023-11-06 22:25:41,617 INFO L140 encePairwiseOnDemand]: 105/117 looper letters, 44 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-11-06 22:25:41,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 298 flow [2023-11-06 22:25:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-11-06 22:25:41,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356125356125356 [2023-11-06 22:25:41,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-11-06 22:25:41,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-11-06 22:25:41,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:41,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-11-06 22:25:41,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:41,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:41,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:41,623 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 161 flow. Second operand 3 states and 188 transitions. [2023-11-06 22:25:41,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 298 flow [2023-11-06 22:25:41,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:41,641 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 172 flow [2023-11-06 22:25:41,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-06 22:25:41,643 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-06 22:25:41,643 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 172 flow [2023-11-06 22:25:41,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:41,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:41,644 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:41,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:25:41,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-06 22:25:41,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:41,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1519968096, now seen corresponding path program 1 times [2023-11-06 22:25:41,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:41,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348074375] [2023-11-06 22:25:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:41,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:41,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:41,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:41,704 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:41,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-06 22:25:41,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-06 22:25:41,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-06 22:25:41,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-06 22:25:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-06 22:25:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-06 22:25:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-06 22:25:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-06 22:25:41,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:25:41,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:25:41,709 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:41,710 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-06 22:25:41,740 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:41,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 81 transitions, 232 flow [2023-11-06 22:25:41,762 INFO L124 PetriNetUnfolderBase]: 8/170 cut-off events. [2023-11-06 22:25:41,762 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 22:25:41,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 170 events. 8/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 271 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 175. Up to 16 conditions per place. [2023-11-06 22:25:41,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 81 transitions, 232 flow [2023-11-06 22:25:41,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 81 transitions, 232 flow [2023-11-06 22:25:41,765 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:41,765 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 81 transitions, 232 flow [2023-11-06 22:25:41,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 81 transitions, 232 flow [2023-11-06 22:25:41,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 81 transitions, 232 flow [2023-11-06 22:25:41,784 INFO L124 PetriNetUnfolderBase]: 8/170 cut-off events. [2023-11-06 22:25:41,784 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 22:25:41,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 170 events. 8/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 271 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 175. Up to 16 conditions per place. [2023-11-06 22:25:41,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 3724 [2023-11-06 22:25:43,236 INFO L134 LiptonReduction]: Checked pairs total: 8584 [2023-11-06 22:25:43,236 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-06 22:25:43,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:43,238 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@310ce58a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:43,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-06 22:25:43,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:43,240 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:25:43,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:43,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:43,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:43,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-06 22:25:43,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash 24400425, now seen corresponding path program 1 times [2023-11-06 22:25:43,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:43,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772443479] [2023-11-06 22:25:43,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:43,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772443479] [2023-11-06 22:25:43,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772443479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:43,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:43,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177040802] [2023-11-06 22:25:43,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:43,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:43,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 129 [2023-11-06 22:25:43,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:43,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:43,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 129 [2023-11-06 22:25:43,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:04,994 INFO L124 PetriNetUnfolderBase]: 164558/202770 cut-off events. [2023-11-06 22:26:04,994 INFO L125 PetriNetUnfolderBase]: For 117491/117491 co-relation queries the response was YES. [2023-11-06 22:26:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439542 conditions, 202770 events. 164558/202770 cut-off events. For 117491/117491 co-relation queries the response was YES. Maximal size of possible extension queue 10263. Compared 1153723 event pairs, 60109 based on Foata normal form. 0/144041 useless extension candidates. Maximal degree in co-relation 90937. Up to 200278 conditions per place. [2023-11-06 22:26:06,601 INFO L140 encePairwiseOnDemand]: 113/129 looper letters, 43 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2023-11-06 22:26:06,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 354 flow [2023-11-06 22:26:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-11-06 22:26:06,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2023-11-06 22:26:06,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-11-06 22:26:06,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-11-06 22:26:06,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:06,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-11-06 22:26:06,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:06,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:06,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:06,608 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 152 flow. Second operand 3 states and 210 transitions. [2023-11-06 22:26:06,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 354 flow [2023-11-06 22:26:06,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 294 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-11-06 22:26:06,673 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 186 flow [2023-11-06 22:26:06,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-11-06 22:26:06,674 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-11-06 22:26:06,674 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 186 flow [2023-11-06 22:26:06,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:06,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:06,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:26:06,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-06 22:26:06,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1025845693, now seen corresponding path program 1 times [2023-11-06 22:26:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109336753] [2023-11-06 22:26:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:06,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:06,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109336753] [2023-11-06 22:26:06,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109336753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:06,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:06,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794049950] [2023-11-06 22:26:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:06,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:06,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 129 [2023-11-06 22:26:06,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:06,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:06,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 129 [2023-11-06 22:26:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand