./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:49:59,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:49:59,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:49:59,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:49:59,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:49:59,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:49:59,606 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:49:59,606 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:49:59,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:49:59,610 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:49:59,610 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:49:59,611 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:49:59,611 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:49:59,611 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:49:59,613 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:49:59,614 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:49:59,614 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:49:59,614 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:49:59,614 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:49:59,615 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:49:59,615 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:49:59,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:49:59,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:49:59,618 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:49:59,618 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:49:59,618 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:49:59,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:49:59,619 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:49:59,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:49:59,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:49:59,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:49:59,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:49:59,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:49:59,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:49:59,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:49:59,621 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:49:59,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:49:59,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:49:59,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:49:59,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:49:59,623 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:49:59,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:49:59,623 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-11-09 02:49:59,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:49:59,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:49:59,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:49:59,912 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:49:59,912 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:49:59,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-09 02:50:01,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:50:01,489 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:50:01,490 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-09 02:50:01,498 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc87fe41/c9cfad53d46a4ce88962610e3bd8690c/FLAG8c2945152 [2024-11-09 02:50:01,511 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc87fe41/c9cfad53d46a4ce88962610e3bd8690c [2024-11-09 02:50:01,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:50:01,514 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:50:01,516 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:50:01,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:50:01,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:50:01,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15811fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01, skipping insertion in model container [2024-11-09 02:50:01,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,551 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:50:01,794 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-11-09 02:50:01,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:50:01,822 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:50:01,876 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-11-09 02:50:01,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:50:01,902 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:50:01,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01 WrapperNode [2024-11-09 02:50:01,903 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:50:01,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:50:01,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:50:01,905 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:50:01,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,953 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 148 [2024-11-09 02:50:01,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:50:01,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:50:01,955 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:50:01,955 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:50:01,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,970 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,991 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 02:50:01,991 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:01,991 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:02,000 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:02,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:02,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:02,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:02,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:50:02,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:50:02,011 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:50:02,011 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:50:02,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (1/1) ... [2024-11-09 02:50:02,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:50:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:02,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 02:50:02,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 02:50:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:50:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 02:50:02,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 02:50:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 02:50:02,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 02:50:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 02:50:02,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 02:50:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:50:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 02:50:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 02:50:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 02:50:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 02:50:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 02:50:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 02:50:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:50:02,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:50:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 02:50:02,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 02:50:02,093 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:50:02,184 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:50:02,186 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:50:02,416 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:50:02,416 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:50:02,655 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:50:02,655 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 02:50:02,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:50:02 BoogieIcfgContainer [2024-11-09 02:50:02,656 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:50:02,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:50:02,663 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:50:02,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:50:02,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:50:01" (1/3) ... [2024-11-09 02:50:02,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44025fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:50:02, skipping insertion in model container [2024-11-09 02:50:02,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:50:01" (2/3) ... [2024-11-09 02:50:02,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44025fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:50:02, skipping insertion in model container [2024-11-09 02:50:02,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:50:02" (3/3) ... [2024-11-09 02:50:02,676 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-11-09 02:50:02,689 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:50:02,690 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:50:02,690 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:50:02,747 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 02:50:02,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 93 flow [2024-11-09 02:50:02,824 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-09 02:50:02,826 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 02:50:02,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 4/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-11-09 02:50:02,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 93 flow [2024-11-09 02:50:02,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 32 transitions, 82 flow [2024-11-09 02:50:02,844 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:50:02,850 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@129189b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:50:02,851 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-09 02:50:02,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:50:02,862 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2024-11-09 02:50:02,862 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 02:50:02,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:02,863 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:02,864 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:02,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:02,870 INFO L85 PathProgramCache]: Analyzing trace with hash -594700694, now seen corresponding path program 1 times [2024-11-09 02:50:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:02,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630434933] [2024-11-09 02:50:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:03,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630434933] [2024-11-09 02:50:03,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630434933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:50:03,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:50:03,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 02:50:03,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231734818] [2024-11-09 02:50:03,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:50:03,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 02:50:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 02:50:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 02:50:03,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-09 02:50:03,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:03,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:03,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-09 02:50:03,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:04,014 INFO L124 PetriNetUnfolderBase]: 487/825 cut-off events. [2024-11-09 02:50:04,014 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-09 02:50:04,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 825 events. 487/825 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3982 event pairs, 54 based on Foata normal form. 84/853 useless extension candidates. Maximal degree in co-relation 1551. Up to 280 conditions per place. [2024-11-09 02:50:04,024 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 53 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-09 02:50:04,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 66 transitions, 276 flow [2024-11-09 02:50:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:50:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:50:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-11-09 02:50:04,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-09 02:50:04,037 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 5 states and 119 transitions. [2024-11-09 02:50:04,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 66 transitions, 276 flow [2024-11-09 02:50:04,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 256 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 02:50:04,043 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2024-11-09 02:50:04,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-09 02:50:04,048 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-09 02:50:04,049 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2024-11-09 02:50:04,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:04,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:04,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:04,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:50:04,050 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:04,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1967084675, now seen corresponding path program 1 times [2024-11-09 02:50:04,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:04,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234487113] [2024-11-09 02:50:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:04,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234487113] [2024-11-09 02:50:04,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234487113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:50:04,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:50:04,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:50:04,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880404042] [2024-11-09 02:50:04,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:50:04,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:50:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:50:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:50:04,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-09 02:50:04,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:04,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:04,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-09 02:50:04,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:04,239 INFO L124 PetriNetUnfolderBase]: 190/380 cut-off events. [2024-11-09 02:50:04,239 INFO L125 PetriNetUnfolderBase]: For 347/444 co-relation queries the response was YES. [2024-11-09 02:50:04,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 380 events. 190/380 cut-off events. For 347/444 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1586 event pairs, 61 based on Foata normal form. 115/446 useless extension candidates. Maximal degree in co-relation 254. Up to 240 conditions per place. [2024-11-09 02:50:04,245 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 24 selfloop transitions, 3 changer transitions 2/42 dead transitions. [2024-11-09 02:50:04,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 169 flow [2024-11-09 02:50:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:50:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:50:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-09 02:50:04,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-11-09 02:50:04,248 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 74 transitions. [2024-11-09 02:50:04,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 169 flow [2024-11-09 02:50:04,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 02:50:04,251 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 109 flow [2024-11-09 02:50:04,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-09 02:50:04,253 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-11-09 02:50:04,254 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 109 flow [2024-11-09 02:50:04,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:04,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:04,255 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:04,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:50:04,255 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:04,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash 637441564, now seen corresponding path program 1 times [2024-11-09 02:50:04,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:04,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725138141] [2024-11-09 02:50:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:04,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:50:04,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:04,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725138141] [2024-11-09 02:50:04,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725138141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:50:04,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:50:04,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:50:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25950708] [2024-11-09 02:50:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:50:04,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:50:04,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:50:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:50:04,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-09 02:50:04,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:04,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:04,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-09 02:50:04,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:04,534 INFO L124 PetriNetUnfolderBase]: 203/405 cut-off events. [2024-11-09 02:50:04,535 INFO L125 PetriNetUnfolderBase]: For 409/547 co-relation queries the response was YES. [2024-11-09 02:50:04,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 405 events. 203/405 cut-off events. For 409/547 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1741 event pairs, 122 based on Foata normal form. 128/477 useless extension candidates. Maximal degree in co-relation 702. Up to 288 conditions per place. [2024-11-09 02:50:04,538 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 22 selfloop transitions, 2 changer transitions 10/47 dead transitions. [2024-11-09 02:50:04,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 202 flow [2024-11-09 02:50:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:50:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:50:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-11-09 02:50:04,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-09 02:50:04,542 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 109 flow. Second operand 4 states and 92 transitions. [2024-11-09 02:50:04,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 202 flow [2024-11-09 02:50:04,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 02:50:04,545 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 120 flow [2024-11-09 02:50:04,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-11-09 02:50:04,546 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-11-09 02:50:04,546 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 120 flow [2024-11-09 02:50:04,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:04,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:04,547 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:04,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 02:50:04,548 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:04,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1066497001, now seen corresponding path program 1 times [2024-11-09 02:50:04,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:04,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174658097] [2024-11-09 02:50:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:50:04,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:04,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174658097] [2024-11-09 02:50:04,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174658097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:04,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699324864] [2024-11-09 02:50:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:04,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:04,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:04,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:04,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:50:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:04,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 02:50:04,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:50:04,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:50:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699324864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:05,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:05,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2024-11-09 02:50:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54907528] [2024-11-09 02:50:05,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:05,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:50:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:50:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:50:05,174 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-09 02:50:05,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 120 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:05,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:05,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-09 02:50:05,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:05,507 INFO L124 PetriNetUnfolderBase]: 810/1303 cut-off events. [2024-11-09 02:50:05,508 INFO L125 PetriNetUnfolderBase]: For 1197/1508 co-relation queries the response was YES. [2024-11-09 02:50:05,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3345 conditions, 1303 events. 810/1303 cut-off events. For 1197/1508 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6003 event pairs, 82 based on Foata normal form. 345/1586 useless extension candidates. Maximal degree in co-relation 3329. Up to 376 conditions per place. [2024-11-09 02:50:05,516 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 70 selfloop transitions, 13 changer transitions 15/104 dead transitions. [2024-11-09 02:50:05,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 104 transitions, 551 flow [2024-11-09 02:50:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 02:50:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 02:50:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-11-09 02:50:05,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-11-09 02:50:05,520 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 120 flow. Second operand 10 states and 178 transitions. [2024-11-09 02:50:05,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 104 transitions, 551 flow [2024-11-09 02:50:05,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 104 transitions, 539 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-09 02:50:05,527 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 188 flow [2024-11-09 02:50:05,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-11-09 02:50:05,528 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2024-11-09 02:50:05,529 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 188 flow [2024-11-09 02:50:05,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:05,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:05,530 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:05,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 02:50:05,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:05,735 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:05,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:05,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1993090265, now seen corresponding path program 2 times [2024-11-09 02:50:05,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:05,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317844992] [2024-11-09 02:50:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:05,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:06,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:06,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317844992] [2024-11-09 02:50:06,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317844992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:06,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744496660] [2024-11-09 02:50:06,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:50:06,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:06,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:06,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:06,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 02:50:06,577 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:50:06,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:06,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 02:50:06,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:06,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 02:50:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:06,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:07,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-09 02:50:07,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:50:07,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-09 02:50:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:07,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744496660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:07,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 02:50:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023729269] [2024-11-09 02:50:07,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:07,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 02:50:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 02:50:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-09 02:50:07,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-09 02:50:07,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 188 flow. Second operand has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:07,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:07,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-09 02:50:07,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:10,064 INFO L124 PetriNetUnfolderBase]: 2082/3645 cut-off events. [2024-11-09 02:50:10,064 INFO L125 PetriNetUnfolderBase]: For 3414/3414 co-relation queries the response was YES. [2024-11-09 02:50:10,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 3645 events. 2082/3645 cut-off events. For 3414/3414 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21639 event pairs, 175 based on Foata normal form. 212/3819 useless extension candidates. Maximal degree in co-relation 7846. Up to 577 conditions per place. [2024-11-09 02:50:10,088 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 226 selfloop transitions, 68 changer transitions 22/328 dead transitions. [2024-11-09 02:50:10,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 328 transitions, 1800 flow [2024-11-09 02:50:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 02:50:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-11-09 02:50:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 736 transitions. [2024-11-09 02:50:10,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-11-09 02:50:10,093 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 188 flow. Second operand 43 states and 736 transitions. [2024-11-09 02:50:10,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 328 transitions, 1800 flow [2024-11-09 02:50:10,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 328 transitions, 1775 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 02:50:10,192 INFO L231 Difference]: Finished difference. Result has 110 places, 104 transitions, 713 flow [2024-11-09 02:50:10,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=713, PETRI_PLACES=110, PETRI_TRANSITIONS=104} [2024-11-09 02:50:10,195 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2024-11-09 02:50:10,195 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 713 flow [2024-11-09 02:50:10,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:10,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:10,196 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:10,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 02:50:10,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:10,399 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:10,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 289155180, now seen corresponding path program 3 times [2024-11-09 02:50:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806424786] [2024-11-09 02:50:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 02:50:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:10,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806424786] [2024-11-09 02:50:10,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806424786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:10,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040071789] [2024-11-09 02:50:10,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:50:10,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:10,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:10,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 02:50:10,663 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:50:10,664 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:10,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 02:50:10,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 02:50:10,721 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 02:50:10,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040071789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:50:10,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 02:50:10,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-09 02:50:10,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533159391] [2024-11-09 02:50:10,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:50:10,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 02:50:10,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 02:50:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 02:50:10,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-09 02:50:10,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 713 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:10,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:10,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-09 02:50:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:11,303 INFO L124 PetriNetUnfolderBase]: 1929/3476 cut-off events. [2024-11-09 02:50:11,303 INFO L125 PetriNetUnfolderBase]: For 18749/18749 co-relation queries the response was YES. [2024-11-09 02:50:11,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13625 conditions, 3476 events. 1929/3476 cut-off events. For 18749/18749 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21139 event pairs, 150 based on Foata normal form. 102/3550 useless extension candidates. Maximal degree in co-relation 11657. Up to 923 conditions per place. [2024-11-09 02:50:11,340 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 99 selfloop transitions, 34 changer transitions 30/173 dead transitions. [2024-11-09 02:50:11,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 173 transitions, 1510 flow [2024-11-09 02:50:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 02:50:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 02:50:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-11-09 02:50:11,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308641975308642 [2024-11-09 02:50:11,343 INFO L175 Difference]: Start difference. First operand has 110 places, 104 transitions, 713 flow. Second operand 9 states and 172 transitions. [2024-11-09 02:50:11,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 173 transitions, 1510 flow [2024-11-09 02:50:11,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 173 transitions, 1407 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-11-09 02:50:11,417 INFO L231 Difference]: Finished difference. Result has 119 places, 101 transitions, 757 flow [2024-11-09 02:50:11,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=757, PETRI_PLACES=119, PETRI_TRANSITIONS=101} [2024-11-09 02:50:11,418 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2024-11-09 02:50:11,418 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 101 transitions, 757 flow [2024-11-09 02:50:11,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:11,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:11,418 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:11,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 02:50:11,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:11,624 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:11,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash 753835570, now seen corresponding path program 4 times [2024-11-09 02:50:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:11,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757973369] [2024-11-09 02:50:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:11,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757973369] [2024-11-09 02:50:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757973369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228783541] [2024-11-09 02:50:12,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:50:12,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:12,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:12,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:12,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 02:50:12,996 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:50:12,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:12,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 02:50:13,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:50:13,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:13,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:50:13,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-09 02:50:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 02:50:13,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228783541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:13,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:13,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 26 [2024-11-09 02:50:13,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812463241] [2024-11-09 02:50:13,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:13,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 02:50:13,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 02:50:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-11-09 02:50:13,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:50:13,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 101 transitions, 757 flow. Second operand has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:13,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:13,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:50:13,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:15,588 INFO L124 PetriNetUnfolderBase]: 4731/7318 cut-off events. [2024-11-09 02:50:15,589 INFO L125 PetriNetUnfolderBase]: For 39546/39732 co-relation queries the response was YES. [2024-11-09 02:50:15,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30048 conditions, 7318 events. 4731/7318 cut-off events. For 39546/39732 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40474 event pairs, 286 based on Foata normal form. 106/7358 useless extension candidates. Maximal degree in co-relation 27381. Up to 1370 conditions per place. [2024-11-09 02:50:15,651 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 163 selfloop transitions, 101 changer transitions 22/302 dead transitions. [2024-11-09 02:50:15,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 2617 flow [2024-11-09 02:50:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 02:50:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-09 02:50:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 432 transitions. [2024-11-09 02:50:15,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-09 02:50:15,653 INFO L175 Difference]: Start difference. First operand has 119 places, 101 transitions, 757 flow. Second operand 28 states and 432 transitions. [2024-11-09 02:50:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 2617 flow [2024-11-09 02:50:15,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 302 transitions, 2455 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-11-09 02:50:15,763 INFO L231 Difference]: Finished difference. Result has 146 places, 155 transitions, 1406 flow [2024-11-09 02:50:15,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1406, PETRI_PLACES=146, PETRI_TRANSITIONS=155} [2024-11-09 02:50:15,764 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2024-11-09 02:50:15,764 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 155 transitions, 1406 flow [2024-11-09 02:50:15,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:15,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:15,765 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:15,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 02:50:15,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:15,970 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:15,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash 397631086, now seen corresponding path program 5 times [2024-11-09 02:50:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:15,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610642278] [2024-11-09 02:50:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:50:16,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:16,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610642278] [2024-11-09 02:50:16,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610642278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:50:16,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:50:16,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:50:16,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011486004] [2024-11-09 02:50:16,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:50:16,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:50:16,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:50:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:50:16,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-09 02:50:16,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 155 transitions, 1406 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:16,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:16,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-09 02:50:16,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:16,507 INFO L124 PetriNetUnfolderBase]: 1878/3786 cut-off events. [2024-11-09 02:50:16,507 INFO L125 PetriNetUnfolderBase]: For 51238/51558 co-relation queries the response was YES. [2024-11-09 02:50:16,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21059 conditions, 3786 events. 1878/3786 cut-off events. For 51238/51558 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 25747 event pairs, 470 based on Foata normal form. 203/3731 useless extension candidates. Maximal degree in co-relation 18150. Up to 1266 conditions per place. [2024-11-09 02:50:16,545 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 89 selfloop transitions, 42 changer transitions 0/204 dead transitions. [2024-11-09 02:50:16,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 204 transitions, 2186 flow [2024-11-09 02:50:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:50:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:50:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-09 02:50:16,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2024-11-09 02:50:16,548 INFO L175 Difference]: Start difference. First operand has 146 places, 155 transitions, 1406 flow. Second operand 4 states and 106 transitions. [2024-11-09 02:50:16,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 204 transitions, 2186 flow [2024-11-09 02:50:16,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 204 transitions, 1897 flow, removed 89 selfloop flow, removed 9 redundant places. [2024-11-09 02:50:16,661 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1700 flow [2024-11-09 02:50:16,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1700, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-11-09 02:50:16,666 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 104 predicate places. [2024-11-09 02:50:16,666 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1700 flow [2024-11-09 02:50:16,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:16,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:16,667 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:16,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 02:50:16,667 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:16,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash 628392377, now seen corresponding path program 6 times [2024-11-09 02:50:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511662345] [2024-11-09 02:50:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:50:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:16,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511662345] [2024-11-09 02:50:16,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511662345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:16,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033420372] [2024-11-09 02:50:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 02:50:16,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:16,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:16,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 02:50:16,897 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 02:50:16,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:16,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 02:50:16,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:50:17,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:50:17,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033420372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:17,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:17,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-09 02:50:17,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983893973] [2024-11-09 02:50:17,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:17,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 02:50:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 02:50:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-09 02:50:17,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-09 02:50:17,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1700 flow. Second operand has 17 states, 17 states have (on average 17.705882352941178) internal successors, (301), 17 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:17,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:17,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-09 02:50:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:17,718 INFO L124 PetriNetUnfolderBase]: 1341/2796 cut-off events. [2024-11-09 02:50:17,718 INFO L125 PetriNetUnfolderBase]: For 35173/35428 co-relation queries the response was YES. [2024-11-09 02:50:17,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15515 conditions, 2796 events. 1341/2796 cut-off events. For 35173/35428 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 17928 event pairs, 365 based on Foata normal form. 105/2694 useless extension candidates. Maximal degree in co-relation 12589. Up to 1510 conditions per place. [2024-11-09 02:50:17,744 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 73 selfloop transitions, 11 changer transitions 30/173 dead transitions. [2024-11-09 02:50:17,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 173 transitions, 1644 flow [2024-11-09 02:50:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 02:50:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 02:50:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-11-09 02:50:17,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5679012345679012 [2024-11-09 02:50:17,747 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1700 flow. Second operand 9 states and 184 transitions. [2024-11-09 02:50:17,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 173 transitions, 1644 flow [2024-11-09 02:50:17,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 173 transitions, 1533 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-11-09 02:50:17,799 INFO L231 Difference]: Finished difference. Result has 139 places, 139 transitions, 1169 flow [2024-11-09 02:50:17,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1169, PETRI_PLACES=139, PETRI_TRANSITIONS=139} [2024-11-09 02:50:17,800 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 101 predicate places. [2024-11-09 02:50:17,800 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 139 transitions, 1169 flow [2024-11-09 02:50:17,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 17.705882352941178) internal successors, (301), 17 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:17,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:17,801 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:17,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 02:50:18,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:18,002 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:18,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -120794088, now seen corresponding path program 7 times [2024-11-09 02:50:18,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:18,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767789942] [2024-11-09 02:50:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:18,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 02:50:18,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:18,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767789942] [2024-11-09 02:50:18,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767789942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:50:18,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:50:18,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 02:50:18,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288381460] [2024-11-09 02:50:18,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:50:18,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:50:18,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:50:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:50:18,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-09 02:50:18,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 139 transitions, 1169 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:18,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:18,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-09 02:50:18,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:18,836 INFO L124 PetriNetUnfolderBase]: 2472/4644 cut-off events. [2024-11-09 02:50:18,837 INFO L125 PetriNetUnfolderBase]: For 50829/51215 co-relation queries the response was YES. [2024-11-09 02:50:18,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24458 conditions, 4644 events. 2472/4644 cut-off events. For 50829/51215 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 29165 event pairs, 588 based on Foata normal form. 342/4699 useless extension candidates. Maximal degree in co-relation 21255. Up to 1921 conditions per place. [2024-11-09 02:50:18,885 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 104 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2024-11-09 02:50:18,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 160 transitions, 1607 flow [2024-11-09 02:50:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:50:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:50:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-09 02:50:18,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-09 02:50:18,887 INFO L175 Difference]: Start difference. First operand has 139 places, 139 transitions, 1169 flow. Second operand 4 states and 88 transitions. [2024-11-09 02:50:18,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 160 transitions, 1607 flow [2024-11-09 02:50:18,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1569 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-09 02:50:18,953 INFO L231 Difference]: Finished difference. Result has 123 places, 139 transitions, 1224 flow [2024-11-09 02:50:18,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1224, PETRI_PLACES=123, PETRI_TRANSITIONS=139} [2024-11-09 02:50:18,954 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2024-11-09 02:50:18,954 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 1224 flow [2024-11-09 02:50:18,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:18,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:18,955 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:18,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 02:50:18,955 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:18,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:18,955 INFO L85 PathProgramCache]: Analyzing trace with hash -991337334, now seen corresponding path program 1 times [2024-11-09 02:50:18,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:18,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881302432] [2024-11-09 02:50:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:18,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:20,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881302432] [2024-11-09 02:50:20,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881302432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321810583] [2024-11-09 02:50:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:20,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:20,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:20,064 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:20,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 02:50:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:20,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 02:50:20,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:20,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:20,898 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-09 02:50:20,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 50 [2024-11-09 02:50:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:21,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321810583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:21,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:21,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2024-11-09 02:50:21,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508043120] [2024-11-09 02:50:21,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:21,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 02:50:21,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 02:50:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 02:50:21,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:50:21,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 1224 flow. Second operand has 37 states, 37 states have (on average 10.405405405405405) internal successors, (385), 37 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:21,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:21,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:50:21,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:34,558 INFO L124 PetriNetUnfolderBase]: 33663/53112 cut-off events. [2024-11-09 02:50:34,558 INFO L125 PetriNetUnfolderBase]: For 507067/507422 co-relation queries the response was YES. [2024-11-09 02:50:34,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272157 conditions, 53112 events. 33663/53112 cut-off events. For 507067/507422 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 365300 event pairs, 2506 based on Foata normal form. 1835/54702 useless extension candidates. Maximal degree in co-relation 264039. Up to 10965 conditions per place. [2024-11-09 02:50:34,901 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 1020 selfloop transitions, 539 changer transitions 455/2026 dead transitions. [2024-11-09 02:50:34,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 2026 transitions, 22540 flow [2024-11-09 02:50:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2024-11-09 02:50:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2024-11-09 02:50:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 2552 transitions. [2024-11-09 02:50:34,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4855403348554033 [2024-11-09 02:50:34,914 INFO L175 Difference]: Start difference. First operand has 123 places, 139 transitions, 1224 flow. Second operand 146 states and 2552 transitions. [2024-11-09 02:50:34,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 2026 transitions, 22540 flow [2024-11-09 02:50:35,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 2026 transitions, 22078 flow, removed 228 selfloop flow, removed 1 redundant places. [2024-11-09 02:50:35,788 INFO L231 Difference]: Finished difference. Result has 349 places, 651 transitions, 8785 flow [2024-11-09 02:50:35,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=8785, PETRI_PLACES=349, PETRI_TRANSITIONS=651} [2024-11-09 02:50:35,789 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 311 predicate places. [2024-11-09 02:50:35,789 INFO L471 AbstractCegarLoop]: Abstraction has has 349 places, 651 transitions, 8785 flow [2024-11-09 02:50:35,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 10.405405405405405) internal successors, (385), 37 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:35,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:35,790 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:35,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 02:50:35,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:35,991 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:50:35,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 120436846, now seen corresponding path program 2 times [2024-11-09 02:50:35,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961281324] [2024-11-09 02:50:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:37,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:37,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961281324] [2024-11-09 02:50:37,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961281324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:37,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072792470] [2024-11-09 02:50:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:50:37,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:37,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:37,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:37,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 02:50:37,294 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:50:37,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:37,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 02:50:37,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:37,822 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-09 02:50:37,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-09 02:50:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:37,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:38,199 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-09 02:50:38,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-11-09 02:50:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:38,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072792470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:38,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:38,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-11-09 02:50:38,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007165006] [2024-11-09 02:50:38,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:38,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 02:50:38,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 02:50:38,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 02:50:39,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-09 02:50:39,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 651 transitions, 8785 flow. Second operand has 39 states, 39 states have (on average 13.820512820512821) internal successors, (539), 39 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:50:39,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:39,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-09 02:50:39,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:51:05,020 INFO L124 PetriNetUnfolderBase]: 39639/70213 cut-off events. [2024-11-09 02:51:05,020 INFO L125 PetriNetUnfolderBase]: For 7174527/7178626 co-relation queries the response was YES. [2024-11-09 02:51:06,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681204 conditions, 70213 events. 39639/70213 cut-off events. For 7174527/7178626 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 601726 event pairs, 6394 based on Foata normal form. 2038/66943 useless extension candidates. Maximal degree in co-relation 680935. Up to 23523 conditions per place. [2024-11-09 02:51:06,590 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 917 selfloop transitions, 794 changer transitions 328/2237 dead transitions. [2024-11-09 02:51:06,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 2237 transitions, 38524 flow [2024-11-09 02:51:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-09 02:51:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-11-09 02:51:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1357 transitions. [2024-11-09 02:51:06,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5626036484245439 [2024-11-09 02:51:06,594 INFO L175 Difference]: Start difference. First operand has 349 places, 651 transitions, 8785 flow. Second operand 67 states and 1357 transitions. [2024-11-09 02:51:06,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 2237 transitions, 38524 flow