./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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-prod-cons.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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:28:07,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:28:07,895 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:28:07,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:28:07,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:28:07,925 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:28:07,925 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:28:07,925 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:28:07,926 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:28:07,929 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:28:07,929 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:28:07,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:28:07,930 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:28:07,930 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:28:07,930 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:28:07,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:28:07,931 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:28:07,931 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:28:07,931 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:28:07,931 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:28:07,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:28:07,936 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:28:07,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:28:07,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:28:07,936 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:28:07,936 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:28:07,937 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:28:07,937 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:28:07,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:28:07,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:28:07,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:28:07,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:28:07,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:28:07,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:28:07,938 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:28:07,938 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:28:07,938 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:28:07,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:28:07,939 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:28:07,939 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:28:07,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:28:07,940 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:28:07,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-11-12 08:28:08,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:28:08,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:28:08,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:28:08,203 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:28:08,204 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:28:08,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-11-12 08:28:09,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:28:09,718 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:28:09,719 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-11-12 08:28:09,725 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8f2f976/34df9b83230e47528d97d6c9d899875a/FLAG6fa7fa752 [2024-11-12 08:28:09,740 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8f2f976/34df9b83230e47528d97d6c9d899875a [2024-11-12 08:28:09,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:28:09,744 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:28:09,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:28:09,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:28:09,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:28:09,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:09,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@507b917d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09, skipping insertion in model container [2024-11-12 08:28:09,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:09,773 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:28:09,937 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-prod-cons.wvr.c[3095,3108] [2024-11-12 08:28:09,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:28:09,956 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:28:09,972 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-prod-cons.wvr.c[3095,3108] [2024-11-12 08:28:09,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:28:09,990 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:28:09,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09 WrapperNode [2024-11-12 08:28:09,990 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:28:09,991 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:28:09,991 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:28:09,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:28:09,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,003 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,028 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 156 [2024-11-12 08:28:10,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:28:10,029 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:28:10,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:28:10,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:28:10,040 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,043 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,066 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-11-12 08:28:10,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,066 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,083 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:28:10,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:28:10,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:28:10,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:28:10,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (1/1) ... [2024-11-12 08:28:10,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:28:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:10,126 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) [2024-11-12 08:28:10,128 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 [2024-11-12 08:28:10,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:28:10,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:28:10,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:28:10,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:28:10,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:28:10,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 08:28:10,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 08:28:10,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:28:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:28:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:28:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:28:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 08:28:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 08:28:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 08:28:10,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:28:10,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:28:10,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:28:10,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:28:10,180 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:28:10,305 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:28:10,307 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:28:10,544 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:28:10,545 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:28:10,785 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:28:10,785 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 08:28:10,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:28:10 BoogieIcfgContainer [2024-11-12 08:28:10,786 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:28:10,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:28:10,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:28:10,794 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:28:10,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:28:09" (1/3) ... [2024-11-12 08:28:10,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f36f0e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:28:10, skipping insertion in model container [2024-11-12 08:28:10,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:28:09" (2/3) ... [2024-11-12 08:28:10,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f36f0e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:28:10, skipping insertion in model container [2024-11-12 08:28:10,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:28:10" (3/3) ... [2024-11-12 08:28:10,800 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-11-12 08:28:10,814 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:28:10,815 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:28:10,815 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:28:10,860 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 08:28:10,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 37 transitions, 95 flow [2024-11-12 08:28:10,915 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-11-12 08:28:10,915 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:28:10,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 4/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-11-12 08:28:10,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 37 transitions, 95 flow [2024-11-12 08:28:10,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 33 transitions, 84 flow [2024-11-12 08:28:10,930 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:28:10,938 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;@52b8caa2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:28:10,939 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-12 08:28:10,952 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:28:10,952 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-11-12 08:28:10,953 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:28:10,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:10,954 INFO L206 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] [2024-11-12 08:28:10,954 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)] === [2024-11-12 08:28:10,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1998691310, now seen corresponding path program 1 times [2024-11-12 08:28:10,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:10,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326522653] [2024-11-12 08:28:10,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:10,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:11,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:11,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326522653] [2024-11-12 08:28:11,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326522653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:28:11,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:28:11,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 08:28:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822139330] [2024-11-12 08:28:11,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:28:11,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:28:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:28:11,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:28:11,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-11-12 08:28:11,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:11,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:11,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-11-12 08:28:11,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:11,797 INFO L124 PetriNetUnfolderBase]: 778/1290 cut-off events. [2024-11-12 08:28:11,797 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-11-12 08:28:11,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 1290 events. 778/1290 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6682 event pairs, 296 based on Foata normal form. 2/1249 useless extension candidates. Maximal degree in co-relation 2346. Up to 517 conditions per place. [2024-11-12 08:28:11,809 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 46 selfloop transitions, 4 changer transitions 3/62 dead transitions. [2024-11-12 08:28:11,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 269 flow [2024-11-12 08:28:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:28:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:28:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-11-12 08:28:11,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-11-12 08:28:11,822 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 84 flow. Second operand 5 states and 115 transitions. [2024-11-12 08:28:11,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 269 flow [2024-11-12 08:28:11,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 243 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 08:28:11,832 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-11-12 08:28:11,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-12 08:28:11,838 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-11-12 08:28:11,838 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-11-12 08:28:11,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:11,839 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:11,839 INFO L206 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] [2024-11-12 08:28:11,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:28:11,839 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)] === [2024-11-12 08:28:11,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash 832852343, now seen corresponding path program 1 times [2024-11-12 08:28:11,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:11,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075009544] [2024-11-12 08:28:11,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:11,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:11,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075009544] [2024-11-12 08:28:11,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075009544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:28:11,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:28:11,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:28:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789622385] [2024-11-12 08:28:11,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:28:11,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:28:11,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:28:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:28:11,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 08:28:11,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 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) [2024-11-12 08:28:11,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:11,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 08:28:11,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:12,035 INFO L124 PetriNetUnfolderBase]: 566/1077 cut-off events. [2024-11-12 08:28:12,035 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-12 08:28:12,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2077 conditions, 1077 events. 566/1077 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5616 event pairs, 231 based on Foata normal form. 18/1034 useless extension candidates. Maximal degree in co-relation 1223. Up to 614 conditions per place. [2024-11-12 08:28:12,041 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 27 selfloop transitions, 2 changer transitions 7/49 dead transitions. [2024-11-12 08:28:12,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 201 flow [2024-11-12 08:28:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:28:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:28:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-11-12 08:28:12,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2024-11-12 08:28:12,044 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 3 states and 79 transitions. [2024-11-12 08:28:12,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 201 flow [2024-11-12 08:28:12,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 08:28:12,047 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-11-12 08:28:12,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-12 08:28:12,049 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-11-12 08:28:12,049 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-11-12 08:28:12,049 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) [2024-11-12 08:28:12,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:12,050 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:28:12,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:28:12,050 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)] === [2024-11-12 08:28:12,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1617767189, now seen corresponding path program 1 times [2024-11-12 08:28:12,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:12,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506642597] [2024-11-12 08:28:12,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:28:12,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:12,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506642597] [2024-11-12 08:28:12,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506642597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:28:12,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:28:12,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:28:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535418412] [2024-11-12 08:28:12,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:28:12,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:28:12,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:28:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:28:12,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 08:28:12,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2024-11-12 08:28:12,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:12,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 08:28:12,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:12,301 INFO L124 PetriNetUnfolderBase]: 679/1306 cut-off events. [2024-11-12 08:28:12,302 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-11-12 08:28:12,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1306 events. 679/1306 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7777 event pairs, 580 based on Foata normal form. 15/1162 useless extension candidates. Maximal degree in co-relation 1526. Up to 823 conditions per place. [2024-11-12 08:28:12,308 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 2 changer transitions 16/53 dead transitions. [2024-11-12 08:28:12,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 226 flow [2024-11-12 08:28:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:28:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:28:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-12 08:28:12,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-12 08:28:12,312 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 4 states and 96 transitions. [2024-11-12 08:28:12,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 226 flow [2024-11-12 08:28:12,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:28:12,314 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 116 flow [2024-11-12 08:28:12,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=116, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-11-12 08:28:12,315 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-11-12 08:28:12,316 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 116 flow [2024-11-12 08:28:12,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2024-11-12 08:28:12,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:12,316 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:28:12,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 08:28:12,317 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)] === [2024-11-12 08:28:12,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash -450042783, now seen corresponding path program 1 times [2024-11-12 08:28:12,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:12,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106252712] [2024-11-12 08:28:12,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:12,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:28:12,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:12,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106252712] [2024-11-12 08:28:12,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106252712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:12,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436876985] [2024-11-12 08:28:12,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:12,481 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) [2024-11-12 08:28:12,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:28:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:12,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-12 08:28:12,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:12,689 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 [2024-11-12 08:28:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:13,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:28:13,470 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 40 treesize of output 36 [2024-11-12 08:28:13,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:28:13,486 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 50 treesize of output 46 [2024-11-12 08:28:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436876985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:28:13,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:28:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 10] total 20 [2024-11-12 08:28:13,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942665972] [2024-11-12 08:28:13,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:28:13,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 08:28:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 08:28:13,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-12 08:28:13,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-12 08:28:13,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 116 flow. Second operand has 21 states, 21 states have (on average 12.857142857142858) internal successors, (270), 21 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:13,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:13,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-12 08:28:13,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:17,095 INFO L124 PetriNetUnfolderBase]: 5178/8594 cut-off events. [2024-11-12 08:28:17,095 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-11-12 08:28:17,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18901 conditions, 8594 events. 5178/8594 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 54768 event pairs, 482 based on Foata normal form. 565/8638 useless extension candidates. Maximal degree in co-relation 18885. Up to 1207 conditions per place. [2024-11-12 08:28:17,124 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 339 selfloop transitions, 109 changer transitions 151/605 dead transitions. [2024-11-12 08:28:17,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 605 transitions, 2833 flow [2024-11-12 08:28:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-12 08:28:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-11-12 08:28:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1208 transitions. [2024-11-12 08:28:17,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49467649467649466 [2024-11-12 08:28:17,131 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 116 flow. Second operand 66 states and 1208 transitions. [2024-11-12 08:28:17,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 605 transitions, 2833 flow [2024-11-12 08:28:17,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 605 transitions, 2801 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-11-12 08:28:17,143 INFO L231 Difference]: Finished difference. Result has 150 places, 167 transitions, 1094 flow [2024-11-12 08:28:17,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1094, PETRI_PLACES=150, PETRI_TRANSITIONS=167} [2024-11-12 08:28:17,145 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 111 predicate places. [2024-11-12 08:28:17,145 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 167 transitions, 1094 flow [2024-11-12 08:28:17,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.857142857142858) internal successors, (270), 21 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:17,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:17,146 INFO L206 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, 1, 1] [2024-11-12 08:28:17,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 08:28:17,346 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 [2024-11-12 08:28:17,346 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)] === [2024-11-12 08:28:17,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:17,347 INFO L85 PathProgramCache]: Analyzing trace with hash -285273189, now seen corresponding path program 2 times [2024-11-12 08:28:17,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:17,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140564888] [2024-11-12 08:28:17,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:17,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:18,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:18,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140564888] [2024-11-12 08:28:18,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140564888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:18,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107817937] [2024-11-12 08:28:18,542 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:28:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:18,544 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) [2024-11-12 08:28:18,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:28:18,614 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 08:28:18,615 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:28:18,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-12 08:28:18,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 08:28:18,894 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:28:18,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107817937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:28:18,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:28:18,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 20 [2024-11-12 08:28:18,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256275322] [2024-11-12 08:28:18,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:28:18,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 08:28:18,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 08:28:18,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-12 08:28:18,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 08:28:18,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 167 transitions, 1094 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:18,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:18,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 08:28:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:20,051 INFO L124 PetriNetUnfolderBase]: 4482/7934 cut-off events. [2024-11-12 08:28:20,051 INFO L125 PetriNetUnfolderBase]: For 269500/269711 co-relation queries the response was YES. [2024-11-12 08:28:20,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45654 conditions, 7934 events. 4482/7934 cut-off events. For 269500/269711 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 53523 event pairs, 299 based on Foata normal form. 72/7708 useless extension candidates. Maximal degree in co-relation 33547. Up to 1634 conditions per place. [2024-11-12 08:28:20,116 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 142 selfloop transitions, 51 changer transitions 125/344 dead transitions. [2024-11-12 08:28:20,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 344 transitions, 3541 flow [2024-11-12 08:28:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 08:28:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 08:28:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 366 transitions. [2024-11-12 08:28:20,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5818759936406995 [2024-11-12 08:28:20,120 INFO L175 Difference]: Start difference. First operand has 150 places, 167 transitions, 1094 flow. Second operand 17 states and 366 transitions. [2024-11-12 08:28:20,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 344 transitions, 3541 flow [2024-11-12 08:28:20,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 344 transitions, 3233 flow, removed 153 selfloop flow, removed 6 redundant places. [2024-11-12 08:28:20,636 INFO L231 Difference]: Finished difference. Result has 160 places, 152 transitions, 1148 flow [2024-11-12 08:28:20,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1148, PETRI_PLACES=160, PETRI_TRANSITIONS=152} [2024-11-12 08:28:20,637 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 121 predicate places. [2024-11-12 08:28:20,638 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 152 transitions, 1148 flow [2024-11-12 08:28:20,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:20,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:20,638 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:28:20,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 08:28:20,842 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 [2024-11-12 08:28:20,843 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)] === [2024-11-12 08:28:20,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1750051024, now seen corresponding path program 3 times [2024-11-12 08:28:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:20,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890104938] [2024-11-12 08:28:20,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:28:20,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890104938] [2024-11-12 08:28:20,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890104938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793431815] [2024-11-12 08:28:20,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:28:20,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:20,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:20,909 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) [2024-11-12 08:28:20,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:28:20,975 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:28:20,976 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:28:20,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:28:20,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:28:21,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:28:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:28:21,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793431815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:28:21,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:28:21,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-11-12 08:28:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283651803] [2024-11-12 08:28:21,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:28:21,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 08:28:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 08:28:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-12 08:28:21,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 08:28:21,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 152 transitions, 1148 flow. Second operand has 11 states, 11 states have (on average 18.181818181818183) internal successors, (200), 11 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:21,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:21,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 08:28:21,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:22,179 INFO L124 PetriNetUnfolderBase]: 3850/7677 cut-off events. [2024-11-12 08:28:22,179 INFO L125 PetriNetUnfolderBase]: For 247566/249473 co-relation queries the response was YES. [2024-11-12 08:28:22,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43055 conditions, 7677 events. 3850/7677 cut-off events. For 247566/249473 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 58171 event pairs, 867 based on Foata normal form. 511/7470 useless extension candidates. Maximal degree in co-relation 32179. Up to 1722 conditions per place. [2024-11-12 08:28:22,241 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 101 selfloop transitions, 28 changer transitions 78/262 dead transitions. [2024-11-12 08:28:22,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 262 transitions, 2266 flow [2024-11-12 08:28:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 08:28:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 08:28:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-11-12 08:28:22,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6584766584766585 [2024-11-12 08:28:22,243 INFO L175 Difference]: Start difference. First operand has 160 places, 152 transitions, 1148 flow. Second operand 11 states and 268 transitions. [2024-11-12 08:28:22,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 262 transitions, 2266 flow [2024-11-12 08:28:22,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 262 transitions, 2116 flow, removed 56 selfloop flow, removed 12 redundant places. [2024-11-12 08:28:22,607 INFO L231 Difference]: Finished difference. Result has 143 places, 138 transitions, 1128 flow [2024-11-12 08:28:22,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1128, PETRI_PLACES=143, PETRI_TRANSITIONS=138} [2024-11-12 08:28:22,608 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 104 predicate places. [2024-11-12 08:28:22,608 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 138 transitions, 1128 flow [2024-11-12 08:28:22,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.181818181818183) internal successors, (200), 11 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:22,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:22,609 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 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, 1] [2024-11-12 08:28:22,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 08:28:22,809 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 [2024-11-12 08:28:22,810 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)] === [2024-11-12 08:28:22,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:22,810 INFO L85 PathProgramCache]: Analyzing trace with hash -7904576, now seen corresponding path program 4 times [2024-11-12 08:28:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:22,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623446322] [2024-11-12 08:28:22,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:23,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623446322] [2024-11-12 08:28:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623446322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931527876] [2024-11-12 08:28:23,726 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:28:23,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:23,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:23,728 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) [2024-11-12 08:28:23,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:28:23,808 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:28:23,808 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:28:23,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-12 08:28:23,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:23,874 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 [2024-11-12 08:28:24,499 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-12 08:28:24,499 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 35 treesize of output 13 [2024-11-12 08:28:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:24,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:28:25,563 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 76 treesize of output 68 [2024-11-12 08:28:25,598 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-12 08:28:25,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 133 treesize of output 131 [2024-11-12 08:28:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931527876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:28:26,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:28:26,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-11-12 08:28:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538820030] [2024-11-12 08:28:26,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:28:26,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-12 08:28:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-12 08:28:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2024-11-12 08:28:26,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 08:28:26,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 138 transitions, 1128 flow. Second operand has 43 states, 43 states have (on average 13.046511627906977) internal successors, (561), 43 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:26,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:26,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 08:28:26,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:36,618 INFO L124 PetriNetUnfolderBase]: 20878/35842 cut-off events. [2024-11-12 08:28:36,618 INFO L125 PetriNetUnfolderBase]: For 656878/657875 co-relation queries the response was YES. [2024-11-12 08:28:37,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186946 conditions, 35842 events. 20878/35842 cut-off events. For 656878/657875 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 288356 event pairs, 2311 based on Foata normal form. 508/35039 useless extension candidates. Maximal degree in co-relation 181014. Up to 5918 conditions per place. [2024-11-12 08:28:37,109 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 489 selfloop transitions, 215 changer transitions 381/1103 dead transitions. [2024-11-12 08:28:37,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1103 transitions, 10994 flow [2024-11-12 08:28:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-12 08:28:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-11-12 08:28:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1581 transitions. [2024-11-12 08:28:37,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5697297297297297 [2024-11-12 08:28:37,117 INFO L175 Difference]: Start difference. First operand has 143 places, 138 transitions, 1128 flow. Second operand 75 states and 1581 transitions. [2024-11-12 08:28:37,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1103 transitions, 10994 flow [2024-11-12 08:28:42,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1103 transitions, 10028 flow, removed 481 selfloop flow, removed 10 redundant places. [2024-11-12 08:28:42,300 INFO L231 Difference]: Finished difference. Result has 223 places, 308 transitions, 3350 flow [2024-11-12 08:28:42,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=3350, PETRI_PLACES=223, PETRI_TRANSITIONS=308} [2024-11-12 08:28:42,305 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 184 predicate places. [2024-11-12 08:28:42,306 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 308 transitions, 3350 flow [2024-11-12 08:28:42,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.046511627906977) internal successors, (561), 43 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:42,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:42,306 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 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, 1] [2024-11-12 08:28:42,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 08:28:42,507 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 [2024-11-12 08:28:42,508 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)] === [2024-11-12 08:28:42,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1025912776, now seen corresponding path program 5 times [2024-11-12 08:28:42,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:42,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210824744] [2024-11-12 08:28:42,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210824744] [2024-11-12 08:28:43,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210824744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70480520] [2024-11-12 08:28:43,820 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:28:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:43,821 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) [2024-11-12 08:28:43,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:28:43,892 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-12 08:28:43,893 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:28:43,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-12 08:28:43,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:43,968 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 15 treesize of output 1 [2024-11-12 08:28:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:44,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:28:45,515 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 77 treesize of output 69 [2024-11-12 08:28:45,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:28:45,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 138 treesize of output 135 [2024-11-12 08:28:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70480520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:28:46,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:28:46,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 46 [2024-11-12 08:28:46,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795902272] [2024-11-12 08:28:46,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:28:46,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-12 08:28:46,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:46,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-12 08:28:46,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2024-11-12 08:28:46,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-12 08:28:46,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 308 transitions, 3350 flow. Second operand has 47 states, 47 states have (on average 10.148936170212766) internal successors, (477), 47 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:46,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:46,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-12 08:28:46,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:07,183 INFO L124 PetriNetUnfolderBase]: 35225/59204 cut-off events. [2024-11-12 08:29:07,183 INFO L125 PetriNetUnfolderBase]: For 1201569/1203221 co-relation queries the response was YES. [2024-11-12 08:29:08,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346819 conditions, 59204 events. 35225/59204 cut-off events. For 1201569/1203221 co-relation queries the response was YES. Maximal size of possible extension queue 1769. Compared 494158 event pairs, 3265 based on Foata normal form. 1238/57179 useless extension candidates. Maximal degree in co-relation 313833. Up to 10518 conditions per place. [2024-11-12 08:29:08,347 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 689 selfloop transitions, 549 changer transitions 564/1817 dead transitions. [2024-11-12 08:29:08,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1817 transitions, 20346 flow [2024-11-12 08:29:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-12 08:29:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2024-11-12 08:29:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 2234 transitions. [2024-11-12 08:29:08,355 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4609036517433464 [2024-11-12 08:29:08,355 INFO L175 Difference]: Start difference. First operand has 223 places, 308 transitions, 3350 flow. Second operand 131 states and 2234 transitions. [2024-11-12 08:29:08,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1817 transitions, 20346 flow [2024-11-12 08:29:19,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1817 transitions, 19120 flow, removed 477 selfloop flow, removed 8 redundant places. [2024-11-12 08:29:19,524 INFO L231 Difference]: Finished difference. Result has 363 places, 666 transitions, 8355 flow [2024-11-12 08:29:19,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=8355, PETRI_PLACES=363, PETRI_TRANSITIONS=666} [2024-11-12 08:29:19,525 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 324 predicate places. [2024-11-12 08:29:19,525 INFO L471 AbstractCegarLoop]: Abstraction has has 363 places, 666 transitions, 8355 flow [2024-11-12 08:29:19,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 10.148936170212766) internal successors, (477), 47 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:29:19,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:19,526 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 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, 1] [2024-11-12 08:29:19,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 08:29:19,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:29:19,727 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)] === [2024-11-12 08:29:19,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:19,727 INFO L85 PathProgramCache]: Analyzing trace with hash 810158266, now seen corresponding path program 6 times [2024-11-12 08:29:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41719294] [2024-11-12 08:29:19,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:19,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:20,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:20,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41719294] [2024-11-12 08:29:20,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41719294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:29:20,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373293721] [2024-11-12 08:29:20,483 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:29:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:29:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:29:20,484 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) [2024-11-12 08:29:20,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:29:20,555 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-12 08:29:20,555 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:29:20,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-12 08:29:20,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:29:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:21,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:29:21,569 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-12 08:29:21,570 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 51 treesize of output 43 [2024-11-12 08:29:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:21,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373293721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:29:21,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:29:21,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-11-12 08:29:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952567875] [2024-11-12 08:29:21,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:29:21,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-12 08:29:21,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-12 08:29:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2024-11-12 08:29:22,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 08:29:22,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 666 transitions, 8355 flow. Second operand has 43 states, 43 states have (on average 13.093023255813954) internal successors, (563), 43 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:29:22,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:22,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 08:29:22,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand