./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i --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/pthread-ext/11_fmaxsymopt.i -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 ec355916cf6ee76d4008e84bb2b3ecc632256e3b320d2f47b453f4ca1f46acbc --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:03:31,743 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:03:31,797 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:03:31,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:03:31,803 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:03:31,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:03:31,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:03:31,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:03:31,845 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:03:31,845 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:03:31,846 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:03:31,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:03:31,847 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:03:31,848 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:03:31,849 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:03:31,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:03:31,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:03:31,851 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:03:31,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:03:31,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:03:31,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:03:31,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:03:31,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:03:31,857 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:03:31,857 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:03:31,858 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:03:31,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:03:31,858 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:03:31,858 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:03:31,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:03:31,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:03:31,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:03:31,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:03:31,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:03:31,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:03:31,872 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:03:31,872 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:03:31,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:03:31,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:03:31,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:03:31,873 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:03:31,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:03:31,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec355916cf6ee76d4008e84bb2b3ecc632256e3b320d2f47b453f4ca1f46acbc [2024-11-12 08:03:32,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:03:32,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:03:32,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:03:32,181 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:03:32,182 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:03:32,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2024-11-12 08:03:33,758 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:03:34,024 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:03:34,025 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2024-11-12 08:03:34,040 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2488327d5/22631750553e4c268ba3b7fbb86db6ab/FLAGfd9d08c82 [2024-11-12 08:03:34,329 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2488327d5/22631750553e4c268ba3b7fbb86db6ab [2024-11-12 08:03:34,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:03:34,333 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:03:34,334 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:03:34,334 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:03:34,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:03:34,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:34,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be2c554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34, skipping insertion in model container [2024-11-12 08:03:34,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:34,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:03:34,763 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/pthread-ext/11_fmaxsymopt.i[30863,30876] [2024-11-12 08:03:34,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:03:34,799 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:03:34,861 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/pthread-ext/11_fmaxsymopt.i[30863,30876] [2024-11-12 08:03:34,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:03:34,910 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:03:34,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34 WrapperNode [2024-11-12 08:03:34,911 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:03:34,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:03:34,912 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:03:34,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:03:34,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:34,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:34,964 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2024-11-12 08:03:34,965 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:03:34,965 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:03:34,965 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:03:34,966 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:03:34,978 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:34,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:34,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,009 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-11-12 08:03:35,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,010 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,018 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,036 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:03:35,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:03:35,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:03:35,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:03:35,043 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (1/1) ... [2024-11-12 08:03:35,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:03:35,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:35,076 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 08:03:35,078 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 08:03:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:03:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:03:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 08:03:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-12 08:03:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:03:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 08:03:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 08:03:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:03:35,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:03:35,127 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 08:03:35,253 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:03:35,256 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:03:35,513 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:03:35,517 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:03:35,698 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:03:35,698 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 08:03:35,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:03:35 BoogieIcfgContainer [2024-11-12 08:03:35,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:03:35,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:03:35,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:03:35,707 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:03:35,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:03:34" (1/3) ... [2024-11-12 08:03:35,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26273c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:03:35, skipping insertion in model container [2024-11-12 08:03:35,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:03:34" (2/3) ... [2024-11-12 08:03:35,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26273c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:03:35, skipping insertion in model container [2024-11-12 08:03:35,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:03:35" (3/3) ... [2024-11-12 08:03:35,712 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2024-11-12 08:03:35,726 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:03:35,726 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:03:35,726 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:03:35,784 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 08:03:35,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 25 transitions, 54 flow [2024-11-12 08:03:35,856 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-12 08:03:35,856 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 08:03:35,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-12 08:03:35,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 25 transitions, 54 flow [2024-11-12 08:03:35,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 25 transitions, 54 flow [2024-11-12 08:03:35,871 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:03:35,878 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;@304619b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:03:35,878 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 08:03:35,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:03:35,885 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-11-12 08:03:35,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 08:03:35,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:35,887 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 08:03:35,887 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-12 08:03:35,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1213145637, now seen corresponding path program 1 times [2024-11-12 08:03:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:35,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226539415] [2024-11-12 08:03:35,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:35,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:36,194 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 08:03:36,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:36,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226539415] [2024-11-12 08:03:36,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226539415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:03:36,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:03:36,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:03:36,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504088734] [2024-11-12 08:03:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:03:36,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:03:36,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:03:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:03:36,234 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-11-12 08:03:36,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:03:36,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:36,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-11-12 08:03:36,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:36,313 INFO L124 PetriNetUnfolderBase]: 25/76 cut-off events. [2024-11-12 08:03:36,313 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 08:03:36,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 76 events. 25/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 118. Up to 56 conditions per place. [2024-11-12 08:03:36,316 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 15 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-11-12 08:03:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 86 flow [2024-11-12 08:03:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:03:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:03:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-12 08:03:36,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-11-12 08:03:36,330 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 54 flow. Second operand 3 states and 41 transitions. [2024-11-12 08:03:36,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 86 flow [2024-11-12 08:03:36,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 08:03:36,335 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 62 flow [2024-11-12 08:03:36,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-11-12 08:03:36,340 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-11-12 08:03:36,340 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 62 flow [2024-11-12 08:03:36,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:03:36,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:36,341 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:36,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:03:36,342 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-12 08:03:36,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2135016630, now seen corresponding path program 1 times [2024-11-12 08:03:36,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:36,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590679382] [2024-11-12 08:03:36,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:36,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:36,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590679382] [2024-11-12 08:03:36,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590679382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241833988] [2024-11-12 08:03:36,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:36,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:36,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:36,431 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 08:03:36,433 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 08:03:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:36,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 08:03:36,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:36,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:03:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:36,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241833988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:03:36,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:03:36,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-12 08:03:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645414749] [2024-11-12 08:03:36,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:03:36,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:03:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:03:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:03:36,598 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-11-12 08:03:36,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 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 08:03:36,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:36,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-11-12 08:03:36,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:36,689 INFO L124 PetriNetUnfolderBase]: 25/79 cut-off events. [2024-11-12 08:03:36,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 08:03:36,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 79 events. 25/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 141. Up to 56 conditions per place. [2024-11-12 08:03:36,693 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2024-11-12 08:03:36,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2024-11-12 08:03:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 08:03:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 08:03:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-11-12 08:03:36,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-12 08:03:36,696 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 62 flow. Second operand 6 states and 65 transitions. [2024-11-12 08:03:36,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2024-11-12 08:03:36,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 110 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 08:03:36,700 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 94 flow [2024-11-12 08:03:36,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-11-12 08:03:36,701 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2024-11-12 08:03:36,703 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 94 flow [2024-11-12 08:03:36,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 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 08:03:36,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:36,703 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-11-12 08:03:36,722 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 08:03:36,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:36,906 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-12 08:03:36,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1054097819, now seen corresponding path program 2 times [2024-11-12 08:03:36,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:36,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608697825] [2024-11-12 08:03:36,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:36,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:37,124 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 08:03:37,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608697825] [2024-11-12 08:03:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608697825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052999671] [2024-11-12 08:03:37,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:03:37,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:37,129 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 08:03:37,131 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 08:03:37,218 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:03:37,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:03:37,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 08:03:37,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:37,253 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 08:03:37,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:03:37,303 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 08:03:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052999671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:03:37,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:03:37,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-12 08:03:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5946543] [2024-11-12 08:03:37,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:03:37,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 08:03:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 08:03:37,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:03:37,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-11-12 08:03:37,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 08:03:37,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:37,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-11-12 08:03:37,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:37,397 INFO L124 PetriNetUnfolderBase]: 25/81 cut-off events. [2024-11-12 08:03:37,397 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 08:03:37,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 81 events. 25/81 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 132. Up to 56 conditions per place. [2024-11-12 08:03:37,399 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2024-11-12 08:03:37,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 150 flow [2024-11-12 08:03:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 08:03:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 08:03:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-11-12 08:03:37,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-12 08:03:37,402 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 94 flow. Second operand 8 states and 80 transitions. [2024-11-12 08:03:37,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 150 flow [2024-11-12 08:03:37,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 136 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-12 08:03:37,405 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 116 flow [2024-11-12 08:03:37,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-11-12 08:03:37,407 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-11-12 08:03:37,407 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 116 flow [2024-11-12 08:03:37,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 08:03:37,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:37,408 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-11-12 08:03:37,427 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 08:03:37,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-12 08:03:37,609 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-12 08:03:37,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash -624295803, now seen corresponding path program 3 times [2024-11-12 08:03:37,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:37,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328783088] [2024-11-12 08:03:37,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:37,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 08:03:37,654 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 08:03:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 08:03:37,719 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 08:03:37,719 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 08:03:37,720 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-12 08:03:37,723 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-12 08:03:37,723 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-12 08:03:37,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 08:03:37,724 INFO L421 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-12 08:03:37,727 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 08:03:37,727 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 08:03:37,749 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 08:03:37,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 43 transitions, 96 flow [2024-11-12 08:03:37,761 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-11-12 08:03:37,762 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:03:37,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 48 events. 7/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-11-12 08:03:37,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 43 transitions, 96 flow [2024-11-12 08:03:37,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 43 transitions, 96 flow [2024-11-12 08:03:37,769 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:03:37,770 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;@304619b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:03:37,770 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-12 08:03:37,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:03:37,776 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-12 08:03:37,777 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 08:03:37,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:37,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:37,777 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-12 08:03:37,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1675961929, now seen corresponding path program 1 times [2024-11-12 08:03:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:37,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755806441] [2024-11-12 08:03:37,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:37,837 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 08:03:37,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:37,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755806441] [2024-11-12 08:03:37,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755806441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:03:37,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:03:37,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:03:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995467717] [2024-11-12 08:03:37,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:03:37,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:03:37,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:03:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:03:37,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-12 08:03:37,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 08:03:37,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:37,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-12 08:03:37,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:38,075 INFO L124 PetriNetUnfolderBase]: 553/1101 cut-off events. [2024-11-12 08:03:38,077 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-12 08:03:38,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1101 events. 553/1101 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5509 event pairs, 468 based on Foata normal form. 92/1075 useless extension candidates. Maximal degree in co-relation 1219. Up to 866 conditions per place. [2024-11-12 08:03:38,096 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-12 08:03:38,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 148 flow [2024-11-12 08:03:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:03:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:03:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-12 08:03:38,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-11-12 08:03:38,099 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 96 flow. Second operand 3 states and 71 transitions. [2024-11-12 08:03:38,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 148 flow [2024-11-12 08:03:38,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 08:03:38,101 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 102 flow [2024-11-12 08:03:38,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-12 08:03:38,105 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-11-12 08:03:38,105 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 102 flow [2024-11-12 08:03:38,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 08:03:38,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:38,107 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:38,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 08:03:38,107 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-12 08:03:38,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -221938941, now seen corresponding path program 1 times [2024-11-12 08:03:38,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:38,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234550655] [2024-11-12 08:03:38,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:38,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234550655] [2024-11-12 08:03:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234550655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107670296] [2024-11-12 08:03:38,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:38,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:38,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:38,181 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 08:03:38,182 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 08:03:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:38,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 08:03:38,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:38,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:03:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107670296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:03:38,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:03:38,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-12 08:03:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124146002] [2024-11-12 08:03:38,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:03:38,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:03:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:03:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:03:38,302 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-12 08:03:38,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 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 08:03:38,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:38,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-12 08:03:38,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:38,498 INFO L124 PetriNetUnfolderBase]: 553/1104 cut-off events. [2024-11-12 08:03:38,498 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-12 08:03:38,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 1104 events. 553/1104 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5520 event pairs, 468 based on Foata normal form. 0/986 useless extension candidates. Maximal degree in co-relation 2006. Up to 866 conditions per place. [2024-11-12 08:03:38,506 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 26 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-11-12 08:03:38,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 176 flow [2024-11-12 08:03:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 08:03:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 08:03:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-12 08:03:38,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-11-12 08:03:38,508 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 102 flow. Second operand 6 states and 112 transitions. [2024-11-12 08:03:38,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 176 flow [2024-11-12 08:03:38,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 08:03:38,510 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 134 flow [2024-11-12 08:03:38,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-12 08:03:38,511 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-11-12 08:03:38,511 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 134 flow [2024-11-12 08:03:38,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 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 08:03:38,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:38,512 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:38,530 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 08:03:38,716 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 08:03:38,717 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-12 08:03:38,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1135707337, now seen corresponding path program 2 times [2024-11-12 08:03:38,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:38,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695358562] [2024-11-12 08:03:38,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:38,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:38,838 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 08:03:38,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:38,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695358562] [2024-11-12 08:03:38,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695358562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:38,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23968922] [2024-11-12 08:03:38,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:03:38,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:38,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:38,841 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 08:03:38,845 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 08:03:38,921 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 08:03:38,922 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:03:38,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-12 08:03:38,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:38,943 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 08:03:38,943 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:03:38,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23968922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:03:38,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:03:38,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-12 08:03:38,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210970254] [2024-11-12 08:03:38,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:03:38,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:03:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:03:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:03:38,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-11-12 08:03:38,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 08:03:38,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:38,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-11-12 08:03:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:39,193 INFO L124 PetriNetUnfolderBase]: 951/1882 cut-off events. [2024-11-12 08:03:39,193 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-12 08:03:39,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1882 events. 951/1882 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10896 event pairs, 418 based on Foata normal form. 0/1678 useless extension candidates. Maximal degree in co-relation 3431. Up to 784 conditions per place. [2024-11-12 08:03:39,209 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 50 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-11-12 08:03:39,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 283 flow [2024-11-12 08:03:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:03:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:03:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-12 08:03:39,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-11-12 08:03:39,211 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 134 flow. Second operand 3 states and 85 transitions. [2024-11-12 08:03:39,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 283 flow [2024-11-12 08:03:39,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 269 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-12 08:03:39,213 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 134 flow [2024-11-12 08:03:39,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-11-12 08:03:39,216 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-11-12 08:03:39,216 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 134 flow [2024-11-12 08:03:39,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 08:03:39,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:39,219 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-11-12 08:03:39,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 08:03:39,420 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 08:03:39,420 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-12 08:03:39,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:39,421 INFO L85 PathProgramCache]: Analyzing trace with hash -478068286, now seen corresponding path program 1 times [2024-11-12 08:03:39,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:39,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869178975] [2024-11-12 08:03:39,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:39,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:39,531 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 08:03:39,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869178975] [2024-11-12 08:03:39,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869178975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47975861] [2024-11-12 08:03:39,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:39,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:39,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:39,534 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 08:03:39,535 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 08:03:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:39,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 08:03:39,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:39,645 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 08:03:39,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:03:39,694 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 08:03:39,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47975861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:03:39,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:03:39,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-12 08:03:39,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526855441] [2024-11-12 08:03:39,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:03:39,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 08:03:39,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 08:03:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:03:39,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-12 08:03:39,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 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 08:03:39,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:39,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-12 08:03:39,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:39,934 INFO L124 PetriNetUnfolderBase]: 966/1930 cut-off events. [2024-11-12 08:03:39,934 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-11-12 08:03:39,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 1930 events. 966/1930 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11245 event pairs, 818 based on Foata normal form. 2/1782 useless extension candidates. Maximal degree in co-relation 3675. Up to 1501 conditions per place. [2024-11-12 08:03:39,950 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 28 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-11-12 08:03:39,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 216 flow [2024-11-12 08:03:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 08:03:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 08:03:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-11-12 08:03:39,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-11-12 08:03:39,951 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 134 flow. Second operand 8 states and 139 transitions. [2024-11-12 08:03:39,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 216 flow [2024-11-12 08:03:39,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 08:03:39,957 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 166 flow [2024-11-12 08:03:39,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=166, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-11-12 08:03:39,958 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-11-12 08:03:39,959 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 166 flow [2024-11-12 08:03:39,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 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 08:03:39,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:39,960 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-11-12 08:03:39,978 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 08:03:40,160 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 08:03:40,161 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-12 08:03:40,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash 378366210, now seen corresponding path program 2 times [2024-11-12 08:03:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395188888] [2024-11-12 08:03:40,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 08:03:40,190 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 08:03:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 08:03:40,219 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 08:03:40,220 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 08:03:40,220 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-12 08:03:40,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-12 08:03:40,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-12 08:03:40,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-12 08:03:40,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 08:03:40,221 INFO L421 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-11-12 08:03:40,221 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 08:03:40,221 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 08:03:40,252 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 08:03:40,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 61 transitions, 140 flow [2024-11-12 08:03:40,263 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2024-11-12 08:03:40,263 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-12 08:03:40,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 10/69 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-11-12 08:03:40,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 61 transitions, 140 flow [2024-11-12 08:03:40,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 61 transitions, 140 flow [2024-11-12 08:03:40,266 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:03:40,267 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;@304619b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:03:40,267 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-12 08:03:40,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:03:40,270 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-12 08:03:40,270 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 08:03:40,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:40,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:40,271 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-12 08:03:40,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash 736650330, now seen corresponding path program 1 times [2024-11-12 08:03:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:40,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106317763] [2024-11-12 08:03:40,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:40,303 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 08:03:40,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:40,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106317763] [2024-11-12 08:03:40,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106317763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:03:40,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:03:40,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:03:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366762006] [2024-11-12 08:03:40,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:03:40,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:03:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:03:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:03:40,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-12 08:03:40,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 08:03:40,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:40,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-12 08:03:40,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:41,594 INFO L124 PetriNetUnfolderBase]: 8815/14150 cut-off events. [2024-11-12 08:03:41,594 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2024-11-12 08:03:41,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 14150 events. 8815/14150 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 92922 event pairs, 7668 based on Foata normal form. 1558/14142 useless extension candidates. Maximal degree in co-relation 2699. Up to 11966 conditions per place. [2024-11-12 08:03:41,706 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 37 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-12 08:03:41,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 212 flow [2024-11-12 08:03:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:03:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:03:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-11-12 08:03:41,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5519125683060109 [2024-11-12 08:03:41,708 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 140 flow. Second operand 3 states and 101 transitions. [2024-11-12 08:03:41,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 212 flow [2024-11-12 08:03:41,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-12 08:03:41,714 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 142 flow [2024-11-12 08:03:41,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-11-12 08:03:41,716 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-11-12 08:03:41,718 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 142 flow [2024-11-12 08:03:41,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 08:03:41,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:41,718 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:41,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 08:03:41,719 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-12 08:03:41,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash 253176913, now seen corresponding path program 1 times [2024-11-12 08:03:41,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:41,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515748540] [2024-11-12 08:03:41,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:41,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515748540] [2024-11-12 08:03:41,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515748540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291415798] [2024-11-12 08:03:41,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:41,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:41,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:41,768 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 08:03:41,770 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 08:03:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:41,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 08:03:41,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:41,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:03:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:41,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291415798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:03:41,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:03:41,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-12 08:03:41,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125567285] [2024-11-12 08:03:41,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:03:41,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:03:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:03:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:03:41,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-12 08:03:41,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 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 08:03:41,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:41,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-12 08:03:41,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:43,124 INFO L124 PetriNetUnfolderBase]: 8815/14153 cut-off events. [2024-11-12 08:03:43,124 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-11-12 08:03:43,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 14153 events. 8815/14153 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 93027 event pairs, 7668 based on Foata normal form. 0/12587 useless extension candidates. Maximal degree in co-relation 26455. Up to 11966 conditions per place. [2024-11-12 08:03:43,237 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 37 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-12 08:03:43,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 238 flow [2024-11-12 08:03:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 08:03:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 08:03:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-11-12 08:03:43,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2024-11-12 08:03:43,239 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 142 flow. Second operand 6 states and 159 transitions. [2024-11-12 08:03:43,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 238 flow [2024-11-12 08:03:43,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 234 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 08:03:43,242 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 174 flow [2024-11-12 08:03:43,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-12 08:03:43,243 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-11-12 08:03:43,243 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 174 flow [2024-11-12 08:03:43,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 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 08:03:43,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:43,244 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:43,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 08:03:43,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:43,450 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-12 08:03:43,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -447337958, now seen corresponding path program 2 times [2024-11-12 08:03:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106309051] [2024-11-12 08:03:43,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:43,518 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 08:03:43,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:43,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106309051] [2024-11-12 08:03:43,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106309051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:03:43,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:03:43,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:03:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497403210] [2024-11-12 08:03:43,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:03:43,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:03:43,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:03:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:03:43,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-11-12 08:03:43,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:03:43,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:43,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-11-12 08:03:43,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:45,565 INFO L124 PetriNetUnfolderBase]: 15165/24285 cut-off events. [2024-11-12 08:03:45,566 INFO L125 PetriNetUnfolderBase]: For 649/649 co-relation queries the response was YES. [2024-11-12 08:03:45,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45550 conditions, 24285 events. 15165/24285 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 175318 event pairs, 6868 based on Foata normal form. 0/21619 useless extension candidates. Maximal degree in co-relation 45514. Up to 10774 conditions per place. [2024-11-12 08:03:45,744 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 72 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-11-12 08:03:45,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 394 flow [2024-11-12 08:03:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:03:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:03:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-12 08:03:45,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2024-11-12 08:03:45,746 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 174 flow. Second operand 3 states and 125 transitions. [2024-11-12 08:03:45,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 394 flow [2024-11-12 08:03:45,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-12 08:03:45,751 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 174 flow [2024-11-12 08:03:45,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-11-12 08:03:45,752 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-11-12 08:03:45,752 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 174 flow [2024-11-12 08:03:45,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:03:45,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:45,753 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:45,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 08:03:45,753 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-12 08:03:45,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash 615573716, now seen corresponding path program 1 times [2024-11-12 08:03:45,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251099996] [2024-11-12 08:03:45,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:45,809 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 08:03:45,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:45,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251099996] [2024-11-12 08:03:45,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251099996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:03:45,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:03:45,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:03:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497973401] [2024-11-12 08:03:45,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:03:45,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:03:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:03:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:03:45,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-11-12 08:03:45,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:03:45,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:45,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-11-12 08:03:45,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:48,850 INFO L124 PetriNetUnfolderBase]: 26272/41960 cut-off events. [2024-11-12 08:03:48,850 INFO L125 PetriNetUnfolderBase]: For 5525/5525 co-relation queries the response was YES. [2024-11-12 08:03:49,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81914 conditions, 41960 events. 26272/41960 cut-off events. For 5525/5525 co-relation queries the response was YES. Maximal size of possible extension queue 1361. Compared 326172 event pairs, 11890 based on Foata normal form. 0/38398 useless extension candidates. Maximal degree in co-relation 81883. Up to 18619 conditions per place. [2024-11-12 08:03:49,222 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 75 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-11-12 08:03:49,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 409 flow [2024-11-12 08:03:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:03:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:03:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-12 08:03:49,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2024-11-12 08:03:49,224 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 174 flow. Second operand 3 states and 124 transitions. [2024-11-12 08:03:49,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 409 flow [2024-11-12 08:03:49,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 08:03:49,280 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 184 flow [2024-11-12 08:03:49,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-12 08:03:49,281 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-11-12 08:03:49,281 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 184 flow [2024-11-12 08:03:49,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:03:49,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:49,282 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:49,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 08:03:49,283 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-12 08:03:49,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1682315564, now seen corresponding path program 1 times [2024-11-12 08:03:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531716516] [2024-11-12 08:03:49,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:49,373 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 08:03:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531716516] [2024-11-12 08:03:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531716516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370405665] [2024-11-12 08:03:49,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:49,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:49,377 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:03:49,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:03:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:49,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 08:03:49,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:49,508 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 08:03:49,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:03:49,556 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 08:03:49,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370405665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:03:49,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:03:49,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-12 08:03:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282961145] [2024-11-12 08:03:49,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:03:49,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 08:03:49,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 08:03:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:03:49,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-12 08:03:49,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 184 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 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 08:03:49,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:49,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-12 08:03:49,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:53,032 INFO L124 PetriNetUnfolderBase]: 26512/42563 cut-off events. [2024-11-12 08:03:53,033 INFO L125 PetriNetUnfolderBase]: For 6954/6954 co-relation queries the response was YES. [2024-11-12 08:03:53,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84762 conditions, 42563 events. 26512/42563 cut-off events. For 6954/6954 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 332214 event pairs, 22914 based on Foata normal form. 2/39877 useless extension candidates. Maximal degree in co-relation 84722. Up to 35624 conditions per place. [2024-11-12 08:03:53,361 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 41 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-12 08:03:53,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 292 flow [2024-11-12 08:03:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 08:03:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 08:03:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-11-12 08:03:53,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4057377049180328 [2024-11-12 08:03:53,363 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 184 flow. Second operand 8 states and 198 transitions. [2024-11-12 08:03:53,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 292 flow [2024-11-12 08:03:53,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 08:03:53,410 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 216 flow [2024-11-12 08:03:53,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-11-12 08:03:53,411 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2024-11-12 08:03:53,411 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 216 flow [2024-11-12 08:03:53,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 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 08:03:53,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:53,412 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:53,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 08:03:53,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:53,613 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-12 08:03:53,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1343367604, now seen corresponding path program 2 times [2024-11-12 08:03:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:53,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298344197] [2024-11-12 08:03:53,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 08:03:53,637 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 08:03:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 08:03:53,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 08:03:53,662 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 08:03:53,662 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-12 08:03:53,662 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-12 08:03:53,662 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-12 08:03:53,662 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-12 08:03:53,663 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-12 08:03:53,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 08:03:53,663 INFO L421 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-11-12 08:03:53,664 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 08:03:53,664 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-12 08:03:53,706 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 08:03:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 186 flow [2024-11-12 08:03:53,720 INFO L124 PetriNetUnfolderBase]: 13/90 cut-off events. [2024-11-12 08:03:53,720 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-12 08:03:53,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 90 events. 13/90 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 270 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-11-12 08:03:53,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 186 flow [2024-11-12 08:03:53,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 186 flow [2024-11-12 08:03:53,722 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:03:53,723 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;@304619b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:03:53,723 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-12 08:03:53,725 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:03:53,725 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-12 08:03:53,725 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 08:03:53,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:53,725 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:53,725 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-12 08:03:53,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash 431376299, now seen corresponding path program 1 times [2024-11-12 08:03:53,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:53,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613600860] [2024-11-12 08:03:53,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:53,752 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 08:03:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:53,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613600860] [2024-11-12 08:03:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613600860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:03:53,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:03:53,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:03:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087013051] [2024-11-12 08:03:53,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:03:53,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:03:53,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:53,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:03:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:03:53,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-12 08:03:53,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 08:03:53,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:53,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-12 08:03:53,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:04:06,799 INFO L124 PetriNetUnfolderBase]: 121273/173906 cut-off events. [2024-11-12 08:04:06,800 INFO L125 PetriNetUnfolderBase]: For 12414/12414 co-relation queries the response was YES. [2024-11-12 08:04:07,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332310 conditions, 173906 events. 121273/173906 cut-off events. For 12414/12414 co-relation queries the response was YES. Maximal size of possible extension queue 4234. Compared 1306096 event pairs, 106668 based on Foata normal form. 22182/177004 useless extension candidates. Maximal degree in co-relation 26653. Up to 152966 conditions per place. [2024-11-12 08:04:08,289 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-11-12 08:04:08,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 278 flow [2024-11-12 08:04:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:04:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:04:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-11-12 08:04:08,291 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2024-11-12 08:04:08,291 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 186 flow. Second operand 3 states and 131 transitions. [2024-11-12 08:04:08,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 278 flow [2024-11-12 08:04:08,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 272 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-12 08:04:08,299 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 182 flow [2024-11-12 08:04:08,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-11-12 08:04:08,300 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2024-11-12 08:04:08,300 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 182 flow [2024-11-12 08:04:08,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 08:04:08,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:04:08,300 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:04:08,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 08:04:08,300 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-12 08:04:08,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:04:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1107078927, now seen corresponding path program 1 times [2024-11-12 08:04:08,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:04:08,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446019897] [2024-11-12 08:04:08,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:04:08,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:04:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:04:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:04:08,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:04:08,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446019897] [2024-11-12 08:04:08,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446019897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:04:08,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558838261] [2024-11-12 08:04:08,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:04:08,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:04:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:04:08,340 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:04:08,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 08:04:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:04:08,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 08:04:08,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:04:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:04:08,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:04:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:04:08,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558838261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:04:08,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:04:08,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-12 08:04:08,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806927078] [2024-11-12 08:04:08,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:04:08,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:04:08,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:04:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:04:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:04:08,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-12 08:04:08,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 0 states have call successors, (0), 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 08:04:08,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:04:08,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-12 08:04:08,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand