./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:07:10,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:07:10,216 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:07:10,219 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:07:10,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:07:10,245 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:07:10,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:07:10,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:07:10,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:07:10,246 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:07:10,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:07:10,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:07:10,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:07:10,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:07:10,252 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:07:10,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:07:10,254 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:07:10,254 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:07:10,254 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:07:10,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:07:10,255 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:07:10,255 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:07:10,256 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:07:10,256 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:07:10,256 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:07:10,256 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:07:10,256 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:07:10,257 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:07:10,257 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:07:10,257 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:07:10,257 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:07:10,257 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:07:10,258 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:07:10,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:07:10,258 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:07:10,259 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:07:10,259 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:07:10,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:07:10,259 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:07:10,259 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:07:10,260 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:07:10,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:07:10,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 [2024-11-17 03:07:10,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:07:10,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:07:10,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:07:10,511 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:07:10,511 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:07:10,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-17 03:07:11,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:07:12,156 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:07:12,158 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-17 03:07:12,174 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8052ddce0/ea9d88cdc3dc44ddb8a6bb500d62fdb0/FLAG29cb483ce [2024-11-17 03:07:12,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8052ddce0/ea9d88cdc3dc44ddb8a6bb500d62fdb0 [2024-11-17 03:07:12,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:07:12,194 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:07:12,196 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:07:12,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:07:12,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:07:12,205 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,206 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12dd6979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12, skipping insertion in model container [2024-11-17 03:07:12,206 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,250 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:07:12,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:07:12,501 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:07:12,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:07:12,561 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:07:12,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12 WrapperNode [2024-11-17 03:07:12,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:07:12,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:07:12,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:07:12,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:07:12,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,585 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,608 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2024-11-17 03:07:12,609 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:07:12,610 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:07:12,610 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:07:12,610 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:07:12,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,625 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,639 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]. [2024-11-17 03:07:12,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,649 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,652 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,657 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:07:12,657 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:07:12,657 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:07:12,658 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:07:12,658 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (1/1) ... [2024-11-17 03:07:12,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:07:12,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:07:12,685 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) [2024-11-17 03:07:12,686 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 [2024-11-17 03:07:12,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:07:12,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:07:12,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:07:12,719 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-17 03:07:12,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-17 03:07:12,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:07:12,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:07:12,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:07:12,719 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:07:12,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:07:12,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:07:12,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:07:12,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:07:12,720 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:07:12,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:07:12,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:07:12,721 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:07:12,838 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:07:12,839 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:07:12,962 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:07:12,962 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:07:13,075 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:07:13,076 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:07:13,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:07:13 BoogieIcfgContainer [2024-11-17 03:07:13,076 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:07:13,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:07:13,078 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:07:13,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:07:13,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:07:12" (1/3) ... [2024-11-17 03:07:13,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b19e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:07:13, skipping insertion in model container [2024-11-17 03:07:13,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:12" (2/3) ... [2024-11-17 03:07:13,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b19e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:07:13, skipping insertion in model container [2024-11-17 03:07:13,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:07:13" (3/3) ... [2024-11-17 03:07:13,083 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-11-17 03:07:13,095 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:07:13,095 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-17 03:07:13,095 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:07:13,128 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:07:13,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 43 transitions, 90 flow [2024-11-17 03:07:13,185 INFO L124 PetriNetUnfolderBase]: 8/50 cut-off events. [2024-11-17 03:07:13,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:07:13,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 50 events. 8/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 77 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2024-11-17 03:07:13,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 43 transitions, 90 flow [2024-11-17 03:07:13,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 43 transitions, 90 flow [2024-11-17 03:07:13,203 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:07:13,211 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=None, 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;@2385d0ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:07:13,212 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-17 03:07:13,215 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:07:13,217 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:07:13,217 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:07:13,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:13,218 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:13,219 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-17 03:07:13,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 7680056, now seen corresponding path program 1 times [2024-11-17 03:07:13,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:13,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188017752] [2024-11-17 03:07:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:13,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188017752] [2024-11-17 03:07:13,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188017752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:13,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:13,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713896180] [2024-11-17 03:07:13,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:13,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:13,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:13,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-17 03:07:13,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 43 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-17 03:07:13,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:13,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-17 03:07:13,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:13,676 INFO L124 PetriNetUnfolderBase]: 22/89 cut-off events. [2024-11-17 03:07:13,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:07:13,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 89 events. 22/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 18 based on Foata normal form. 21/107 useless extension candidates. Maximal degree in co-relation 128. Up to 56 conditions per place. [2024-11-17 03:07:13,678 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 16 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-11-17 03:07:13,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 100 flow [2024-11-17 03:07:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:07:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:07:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-17 03:07:13,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5658914728682171 [2024-11-17 03:07:13,689 INFO L175 Difference]: Start difference. First operand has 39 places, 43 transitions, 90 flow. Second operand 3 states and 73 transitions. [2024-11-17 03:07:13,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 100 flow [2024-11-17 03:07:13,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:07:13,693 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 68 flow [2024-11-17 03:07:13,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-11-17 03:07:13,697 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2024-11-17 03:07:13,697 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 68 flow [2024-11-17 03:07:13,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-17 03:07:13,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:13,697 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:13,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:07:13,698 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-17 03:07:13,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:13,700 INFO L85 PathProgramCache]: Analyzing trace with hash 7680057, now seen corresponding path program 1 times [2024-11-17 03:07:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:13,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261017965] [2024-11-17 03:07:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:13,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:13,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261017965] [2024-11-17 03:07:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261017965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:13,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:13,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:13,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085129537] [2024-11-17 03:07:13,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:13,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:13,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:13,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-17 03:07:13,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-17 03:07:13,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:13,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-17 03:07:13,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:13,916 INFO L124 PetriNetUnfolderBase]: 22/92 cut-off events. [2024-11-17 03:07:13,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:07:13,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 92 events. 22/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 228 event pairs, 18 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 152. Up to 59 conditions per place. [2024-11-17 03:07:13,919 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 19 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-11-17 03:07:13,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 114 flow [2024-11-17 03:07:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:07:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:07:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-17 03:07:13,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-11-17 03:07:13,922 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 68 flow. Second operand 3 states and 71 transitions. [2024-11-17 03:07:13,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 114 flow [2024-11-17 03:07:13,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:07:13,924 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 81 flow [2024-11-17 03:07:13,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-17 03:07:13,925 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2024-11-17 03:07:13,925 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 81 flow [2024-11-17 03:07:13,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-17 03:07:13,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:13,926 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:07:13,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:07:13,927 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-17 03:07:13,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1163573497, now seen corresponding path program 1 times [2024-11-17 03:07:13,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:13,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785348397] [2024-11-17 03:07:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:14,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:14,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785348397] [2024-11-17 03:07:14,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785348397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:07:14,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594757292] [2024-11-17 03:07:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:14,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:14,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:07:14,110 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) [2024-11-17 03:07:14,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:07:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:14,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:07:14,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:07:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:14,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:07:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:14,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594757292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:07:14,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:07:14,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:07:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199901795] [2024-11-17 03:07:14,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:07:14,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:07:14,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:07:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:07:14,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-17 03:07:14,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 81 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 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) [2024-11-17 03:07:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:14,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-17 03:07:14,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:14,534 INFO L124 PetriNetUnfolderBase]: 24/103 cut-off events. [2024-11-17 03:07:14,534 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:07:14,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 103 events. 24/103 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 247 event pairs, 18 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 179. Up to 56 conditions per place. [2024-11-17 03:07:14,535 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 20 selfloop transitions, 9 changer transitions 0/41 dead transitions. [2024-11-17 03:07:14,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 163 flow [2024-11-17 03:07:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:07:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:07:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-11-17 03:07:14,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-11-17 03:07:14,537 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 81 flow. Second operand 7 states and 145 transitions. [2024-11-17 03:07:14,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 163 flow [2024-11-17 03:07:14,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:07:14,539 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 116 flow [2024-11-17 03:07:14,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-17 03:07:14,540 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2024-11-17 03:07:14,540 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 116 flow [2024-11-17 03:07:14,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 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) [2024-11-17 03:07:14,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:14,540 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:14,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:07:14,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:14,745 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-17 03:07:14,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash -415683398, now seen corresponding path program 1 times [2024-11-17 03:07:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:14,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266654534] [2024-11-17 03:07:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:14,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:07:14,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266654534] [2024-11-17 03:07:14,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266654534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:07:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987690221] [2024-11-17 03:07:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:14,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:07:14,848 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) [2024-11-17 03:07:14,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:07:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:14,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:07:14,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:07:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:07:14,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:07:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:07:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987690221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:07:15,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:07:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 03:07:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538185048] [2024-11-17 03:07:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:07:15,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:07:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:07:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:07:15,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-17 03:07:15,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 116 flow. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 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) [2024-11-17 03:07:15,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:15,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-17 03:07:15,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:15,120 INFO L124 PetriNetUnfolderBase]: 22/105 cut-off events. [2024-11-17 03:07:15,120 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-17 03:07:15,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 105 events. 22/105 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 18 based on Foata normal form. 4/106 useless extension candidates. Maximal degree in co-relation 200. Up to 56 conditions per place. [2024-11-17 03:07:15,121 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 21 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-11-17 03:07:15,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 202 flow [2024-11-17 03:07:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:07:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:07:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-11-17 03:07:15,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-11-17 03:07:15,124 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 116 flow. Second operand 8 states and 169 transitions. [2024-11-17 03:07:15,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 202 flow [2024-11-17 03:07:15,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 188 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-17 03:07:15,125 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 151 flow [2024-11-17 03:07:15,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=151, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2024-11-17 03:07:15,126 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 13 predicate places. [2024-11-17 03:07:15,128 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 151 flow [2024-11-17 03:07:15,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 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) [2024-11-17 03:07:15,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:15,128 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:15,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:07:15,329 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,SelfDestructingSolverStorable3 [2024-11-17 03:07:15,330 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-17 03:07:15,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:15,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1545903290, now seen corresponding path program 2 times [2024-11-17 03:07:15,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:15,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098361882] [2024-11-17 03:07:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:07:15,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:07:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:07:15,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:07:15,393 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:07:15,394 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-11-17 03:07:15,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2024-11-17 03:07:15,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-11-17 03:07:15,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:07:15,401 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-11-17 03:07:15,403 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:07:15,404 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-17 03:07:15,436 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:07:15,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 68 transitions, 146 flow [2024-11-17 03:07:15,450 INFO L124 PetriNetUnfolderBase]: 13/83 cut-off events. [2024-11-17 03:07:15,451 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:07:15,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 13/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 56. Up to 6 conditions per place. [2024-11-17 03:07:15,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 68 transitions, 146 flow [2024-11-17 03:07:15,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 68 transitions, 146 flow [2024-11-17 03:07:15,455 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:07:15,456 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=None, 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;@2385d0ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:07:15,458 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-17 03:07:15,459 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:07:15,459 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:07:15,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:07:15,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:15,459 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:15,459 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-17 03:07:15,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 9773368, now seen corresponding path program 1 times [2024-11-17 03:07:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:15,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688810715] [2024-11-17 03:07:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:15,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:15,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688810715] [2024-11-17 03:07:15,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688810715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:15,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:15,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157164918] [2024-11-17 03:07:15,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:15,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:15,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:15,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2024-11-17 03:07:15,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:07:15,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:15,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2024-11-17 03:07:15,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:15,622 INFO L124 PetriNetUnfolderBase]: 532/1159 cut-off events. [2024-11-17 03:07:15,622 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-17 03:07:15,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 1159 events. 532/1159 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6939 event pairs, 468 based on Foata normal form. 298/1421 useless extension candidates. Maximal degree in co-relation 1298. Up to 866 conditions per place. [2024-11-17 03:07:15,630 INFO L140 encePairwiseOnDemand]: 55/68 looper letters, 27 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2024-11-17 03:07:15,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 168 flow [2024-11-17 03:07:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:07:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:07:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-11-17 03:07:15,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2024-11-17 03:07:15,632 INFO L175 Difference]: Start difference. First operand has 62 places, 68 transitions, 146 flow. Second operand 3 states and 115 transitions. [2024-11-17 03:07:15,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 168 flow [2024-11-17 03:07:15,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 51 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:07:15,633 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 114 flow [2024-11-17 03:07:15,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-17 03:07:15,634 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2024-11-17 03:07:15,634 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 114 flow [2024-11-17 03:07:15,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:07:15,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:15,635 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:15,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:07:15,635 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-17 03:07:15,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:15,635 INFO L85 PathProgramCache]: Analyzing trace with hash 9773369, now seen corresponding path program 1 times [2024-11-17 03:07:15,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:15,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110413915] [2024-11-17 03:07:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:15,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:15,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:15,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110413915] [2024-11-17 03:07:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110413915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:15,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:15,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:15,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740568797] [2024-11-17 03:07:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:15,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:15,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:15,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 68 [2024-11-17 03:07:15,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 114 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) [2024-11-17 03:07:15,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:15,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 68 [2024-11-17 03:07:15,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:15,846 INFO L124 PetriNetUnfolderBase]: 532/1162 cut-off events. [2024-11-17 03:07:15,847 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-17 03:07:15,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 1162 events. 532/1162 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6948 event pairs, 468 based on Foata normal form. 0/1124 useless extension candidates. Maximal degree in co-relation 2062. Up to 869 conditions per place. [2024-11-17 03:07:15,853 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 30 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-11-17 03:07:15,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 182 flow [2024-11-17 03:07:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:07:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:07:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-17 03:07:15,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-11-17 03:07:15,854 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 114 flow. Second operand 3 states and 112 transitions. [2024-11-17 03:07:15,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 182 flow [2024-11-17 03:07:15,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:07:15,856 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 127 flow [2024-11-17 03:07:15,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-17 03:07:15,856 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-11-17 03:07:15,857 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 127 flow [2024-11-17 03:07:15,857 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) [2024-11-17 03:07:15,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:15,857 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:07:15,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:07:15,857 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-17 03:07:15,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash -899010627, now seen corresponding path program 1 times [2024-11-17 03:07:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:15,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169522665] [2024-11-17 03:07:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:15,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:15,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169522665] [2024-11-17 03:07:15,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169522665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:07:15,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200080702] [2024-11-17 03:07:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:15,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:15,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:07:15,933 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) [2024-11-17 03:07:15,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:07:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:15,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:07:15,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:07:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:16,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:07:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200080702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:07:16,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:07:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:07:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023985885] [2024-11-17 03:07:16,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:07:16,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:07:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:07:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:07:16,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 68 [2024-11-17 03:07:16,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 127 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2024-11-17 03:07:16,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:16,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 68 [2024-11-17 03:07:16,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:16,379 INFO L124 PetriNetUnfolderBase]: 534/1173 cut-off events. [2024-11-17 03:07:16,379 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-17 03:07:16,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 1173 events. 534/1173 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6982 event pairs, 468 based on Foata normal form. 1/1138 useless extension candidates. Maximal degree in co-relation 2089. Up to 866 conditions per place. [2024-11-17 03:07:16,384 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 31 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-11-17 03:07:16,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 231 flow [2024-11-17 03:07:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:07:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:07:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-11-17 03:07:16,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47478991596638653 [2024-11-17 03:07:16,385 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 127 flow. Second operand 7 states and 226 transitions. [2024-11-17 03:07:16,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 231 flow [2024-11-17 03:07:16,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:07:16,387 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 162 flow [2024-11-17 03:07:16,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-11-17 03:07:16,388 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2024-11-17 03:07:16,388 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 162 flow [2024-11-17 03:07:16,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2024-11-17 03:07:16,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:16,388 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:16,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:07:16,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:16,593 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-17 03:07:16,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1929708093, now seen corresponding path program 1 times [2024-11-17 03:07:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:16,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954624244] [2024-11-17 03:07:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:16,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954624244] [2024-11-17 03:07:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954624244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:07:16,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621380853] [2024-11-17 03:07:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:16,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:16,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:07:16,662 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) [2024-11-17 03:07:16,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:07:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:16,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:07:16,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:07:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:16,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:07:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:16,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621380853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:07:16,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:07:16,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 03:07:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778575949] [2024-11-17 03:07:16,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:07:16,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:07:16,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:07:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:07:16,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2024-11-17 03:07:16,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 162 flow. Second operand has 9 states, 9 states have (on average 29.11111111111111) internal successors, (262), 9 states have internal predecessors, (262), 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) [2024-11-17 03:07:16,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:16,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2024-11-17 03:07:16,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:16,902 INFO L124 PetriNetUnfolderBase]: 532/1175 cut-off events. [2024-11-17 03:07:16,902 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-17 03:07:16,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2123 conditions, 1175 events. 532/1175 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6930 event pairs, 468 based on Foata normal form. 4/1143 useless extension candidates. Maximal degree in co-relation 2110. Up to 866 conditions per place. [2024-11-17 03:07:16,915 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 32 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-11-17 03:07:16,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 270 flow [2024-11-17 03:07:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:07:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:07:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 260 transitions. [2024-11-17 03:07:16,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2024-11-17 03:07:16,916 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 162 flow. Second operand 8 states and 260 transitions. [2024-11-17 03:07:16,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 270 flow [2024-11-17 03:07:16,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 256 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-17 03:07:16,920 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 197 flow [2024-11-17 03:07:16,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-11-17 03:07:16,921 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-17 03:07:16,922 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 197 flow [2024-11-17 03:07:16,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.11111111111111) internal successors, (262), 9 states have internal predecessors, (262), 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) [2024-11-17 03:07:16,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:16,923 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:16,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:07:17,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:17,123 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-17 03:07:17,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash -981303491, now seen corresponding path program 2 times [2024-11-17 03:07:17,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:17,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114510654] [2024-11-17 03:07:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:17,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-17 03:07:17,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:17,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114510654] [2024-11-17 03:07:17,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114510654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:17,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:17,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:07:17,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859545787] [2024-11-17 03:07:17,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:17,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:07:17,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:07:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:07:17,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 68 [2024-11-17 03:07:17,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-17 03:07:17,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:17,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 68 [2024-11-17 03:07:17,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:17,599 INFO L124 PetriNetUnfolderBase]: 1062/2228 cut-off events. [2024-11-17 03:07:17,599 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-17 03:07:17,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4082 conditions, 2228 events. 1062/2228 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 13792 event pairs, 344 based on Foata normal form. 33/2202 useless extension candidates. Maximal degree in co-relation 4064. Up to 688 conditions per place. [2024-11-17 03:07:17,609 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 66 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-17 03:07:17,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 417 flow [2024-11-17 03:07:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:07:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:07:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 196 transitions. [2024-11-17 03:07:17,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5764705882352941 [2024-11-17 03:07:17,610 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 197 flow. Second operand 5 states and 196 transitions. [2024-11-17 03:07:17,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 417 flow [2024-11-17 03:07:17,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 411 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:07:17,613 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 218 flow [2024-11-17 03:07:17,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2024-11-17 03:07:17,614 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 14 predicate places. [2024-11-17 03:07:17,614 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 218 flow [2024-11-17 03:07:17,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-17 03:07:17,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:17,614 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:17,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:07:17,614 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-17 03:07:17,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash -257289115, now seen corresponding path program 1 times [2024-11-17 03:07:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088509062] [2024-11-17 03:07:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:17,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:07:17,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:07:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:07:17,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:07:17,654 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:07:17,654 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-11-17 03:07:17,654 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2024-11-17 03:07:17,654 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2024-11-17 03:07:17,655 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2024-11-17 03:07:17,656 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2024-11-17 03:07:17,656 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2024-11-17 03:07:17,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:07:17,656 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2024-11-17 03:07:17,656 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:07:17,656 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-17 03:07:17,675 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:07:17,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 93 transitions, 204 flow [2024-11-17 03:07:17,682 INFO L124 PetriNetUnfolderBase]: 18/116 cut-off events. [2024-11-17 03:07:17,682 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-17 03:07:17,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 116 events. 18/116 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 316 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 87. Up to 8 conditions per place. [2024-11-17 03:07:17,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 93 transitions, 204 flow [2024-11-17 03:07:17,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 93 transitions, 204 flow [2024-11-17 03:07:17,684 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:07:17,684 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=None, 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;@2385d0ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:07:17,684 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-17 03:07:17,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:07:17,685 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:07:17,685 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:07:17,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:17,685 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:17,685 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-17 03:07:17,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash 12636280, now seen corresponding path program 1 times [2024-11-17 03:07:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:17,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389139899] [2024-11-17 03:07:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:17,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389139899] [2024-11-17 03:07:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389139899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:17,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:17,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:17,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945842900] [2024-11-17 03:07:17,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:17,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:17,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 93 [2024-11-17 03:07:17,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-17 03:07:17,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:17,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 93 [2024-11-17 03:07:17,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:18,766 INFO L124 PetriNetUnfolderBase]: 8632/14915 cut-off events. [2024-11-17 03:07:18,767 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2024-11-17 03:07:18,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27318 conditions, 14915 events. 8632/14915 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 117551 event pairs, 7668 based on Foata normal form. 3964/18474 useless extension candidates. Maximal degree in co-relation 2142. Up to 11966 conditions per place. [2024-11-17 03:07:18,828 INFO L140 encePairwiseOnDemand]: 76/93 looper letters, 38 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2024-11-17 03:07:18,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 238 flow [2024-11-17 03:07:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:07:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:07:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-17 03:07:18,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5627240143369175 [2024-11-17 03:07:18,830 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 204 flow. Second operand 3 states and 157 transitions. [2024-11-17 03:07:18,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 238 flow [2024-11-17 03:07:18,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 236 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-17 03:07:18,832 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 160 flow [2024-11-17 03:07:18,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-11-17 03:07:18,832 INFO L277 CegarLoopForPetriNet]: 85 programPoint places, -9 predicate places. [2024-11-17 03:07:18,832 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 160 flow [2024-11-17 03:07:18,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-17 03:07:18,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:18,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:18,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:07:18,833 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-17 03:07:18,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 12636281, now seen corresponding path program 1 times [2024-11-17 03:07:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:18,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935833544] [2024-11-17 03:07:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:18,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:18,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935833544] [2024-11-17 03:07:18,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935833544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:18,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:18,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527156439] [2024-11-17 03:07:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:18,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:18,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:18,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 93 [2024-11-17 03:07:18,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-11-17 03:07:18,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:18,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 93 [2024-11-17 03:07:18,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:19,968 INFO L124 PetriNetUnfolderBase]: 8632/14918 cut-off events. [2024-11-17 03:07:19,968 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2024-11-17 03:07:19,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27227 conditions, 14918 events. 8632/14918 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 117624 event pairs, 7668 based on Foata normal form. 0/14511 useless extension candidates. Maximal degree in co-relation 27218. Up to 11969 conditions per place. [2024-11-17 03:07:20,035 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 41 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-11-17 03:07:20,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 250 flow [2024-11-17 03:07:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:07:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:07:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-11-17 03:07:20,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-17 03:07:20,037 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 160 flow. Second operand 3 states and 153 transitions. [2024-11-17 03:07:20,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 250 flow [2024-11-17 03:07:20,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:07:20,039 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 173 flow [2024-11-17 03:07:20,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2024-11-17 03:07:20,040 INFO L277 CegarLoopForPetriNet]: 85 programPoint places, -7 predicate places. [2024-11-17 03:07:20,040 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 173 flow [2024-11-17 03:07:20,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-11-17 03:07:20,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:20,040 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:07:20,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:07:20,041 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-17 03:07:20,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1509252806, now seen corresponding path program 1 times [2024-11-17 03:07:20,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:20,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924779882] [2024-11-17 03:07:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:20,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924779882] [2024-11-17 03:07:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924779882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:07:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072626427] [2024-11-17 03:07:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:07:20,263 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) [2024-11-17 03:07:20,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:07:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:20,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:07:20,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:07:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:20,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:07:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:20,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072626427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:07:20,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:07:20,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:07:20,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698865464] [2024-11-17 03:07:20,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:07:20,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:07:20,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:07:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:07:20,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 93 [2024-11-17 03:07:20,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 173 flow. Second operand has 9 states, 9 states have (on average 37.666666666666664) internal successors, (339), 9 states have internal predecessors, (339), 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) [2024-11-17 03:07:20,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:20,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 93 [2024-11-17 03:07:20,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:21,623 INFO L124 PetriNetUnfolderBase]: 8634/14929 cut-off events. [2024-11-17 03:07:21,623 INFO L125 PetriNetUnfolderBase]: For 438/438 co-relation queries the response was YES. [2024-11-17 03:07:21,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27256 conditions, 14929 events. 8634/14929 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 117508 event pairs, 7668 based on Foata normal form. 1/14525 useless extension candidates. Maximal degree in co-relation 27245. Up to 11966 conditions per place. [2024-11-17 03:07:21,702 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 42 selfloop transitions, 9 changer transitions 0/81 dead transitions. [2024-11-17 03:07:21,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 299 flow [2024-11-17 03:07:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:07:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:07:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 307 transitions. [2024-11-17 03:07:21,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4715821812596006 [2024-11-17 03:07:21,704 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 173 flow. Second operand 7 states and 307 transitions. [2024-11-17 03:07:21,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 299 flow [2024-11-17 03:07:21,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:07:21,707 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 208 flow [2024-11-17 03:07:21,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2024-11-17 03:07:21,708 INFO L277 CegarLoopForPetriNet]: 85 programPoint places, -1 predicate places. [2024-11-17 03:07:21,708 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 208 flow [2024-11-17 03:07:21,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 37.666666666666664) internal successors, (339), 9 states have internal predecessors, (339), 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) [2024-11-17 03:07:21,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:21,708 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:21,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:07:21,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-17 03:07:21,913 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-17 03:07:21,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash 578935218, now seen corresponding path program 1 times [2024-11-17 03:07:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:21,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517557727] [2024-11-17 03:07:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:21,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517557727] [2024-11-17 03:07:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517557727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:07:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795457134] [2024-11-17 03:07:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:21,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:07:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:07:21,973 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) [2024-11-17 03:07:21,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:07:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:22,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:07:22,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:07:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:22,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:07:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:22,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795457134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:07:22,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:07:22,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 03:07:22,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112225235] [2024-11-17 03:07:22,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:07:22,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:07:22,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:07:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:07:22,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-11-17 03:07:22,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 208 flow. Second operand has 9 states, 9 states have (on average 39.111111111111114) internal successors, (352), 9 states have internal predecessors, (352), 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) [2024-11-17 03:07:22,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:22,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-11-17 03:07:22,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:23,430 INFO L124 PetriNetUnfolderBase]: 8632/14931 cut-off events. [2024-11-17 03:07:23,431 INFO L125 PetriNetUnfolderBase]: For 462/462 co-relation queries the response was YES. [2024-11-17 03:07:23,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27280 conditions, 14931 events. 8632/14931 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 117565 event pairs, 7668 based on Foata normal form. 4/14530 useless extension candidates. Maximal degree in co-relation 27266. Up to 11966 conditions per place. [2024-11-17 03:07:23,495 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 43 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2024-11-17 03:07:23,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 338 flow [2024-11-17 03:07:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:07:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:07:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 351 transitions. [2024-11-17 03:07:23,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4717741935483871 [2024-11-17 03:07:23,497 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 208 flow. Second operand 8 states and 351 transitions. [2024-11-17 03:07:23,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 338 flow [2024-11-17 03:07:23,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 81 transitions, 324 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-17 03:07:23,500 INFO L231 Difference]: Finished difference. Result has 94 places, 77 transitions, 243 flow [2024-11-17 03:07:23,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=94, PETRI_TRANSITIONS=77} [2024-11-17 03:07:23,501 INFO L277 CegarLoopForPetriNet]: 85 programPoint places, 9 predicate places. [2024-11-17 03:07:23,501 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 77 transitions, 243 flow [2024-11-17 03:07:23,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.111111111111114) internal successors, (352), 9 states have internal predecessors, (352), 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) [2024-11-17 03:07:23,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:23,502 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:23,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:07:23,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:07:23,703 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-17 03:07:23,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1353555726, now seen corresponding path program 2 times [2024-11-17 03:07:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:23,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450039990] [2024-11-17 03:07:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-17 03:07:23,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450039990] [2024-11-17 03:07:23,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450039990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:23,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:23,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:07:23,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123279196] [2024-11-17 03:07:23,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:23,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:07:23,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:07:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:07:23,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 93 [2024-11-17 03:07:23,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 77 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 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) [2024-11-17 03:07:23,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:23,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 93 [2024-11-17 03:07:23,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:26,373 INFO L124 PetriNetUnfolderBase]: 17262/29124 cut-off events. [2024-11-17 03:07:26,373 INFO L125 PetriNetUnfolderBase]: For 737/737 co-relation queries the response was YES. [2024-11-17 03:07:26,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53779 conditions, 29124 events. 17262/29124 cut-off events. For 737/737 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 238799 event pairs, 3668 based on Foata normal form. 333/28837 useless extension candidates. Maximal degree in co-relation 53760. Up to 9568 conditions per place. [2024-11-17 03:07:26,535 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 99 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2024-11-17 03:07:26,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 583 flow [2024-11-17 03:07:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:07:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:07:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2024-11-17 03:07:26,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-17 03:07:26,537 INFO L175 Difference]: Start difference. First operand has 94 places, 77 transitions, 243 flow. Second operand 5 states and 279 transitions. [2024-11-17 03:07:26,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 583 flow [2024-11-17 03:07:26,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 577 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:07:26,540 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 264 flow [2024-11-17 03:07:26,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2024-11-17 03:07:26,541 INFO L277 CegarLoopForPetriNet]: 85 programPoint places, 12 predicate places. [2024-11-17 03:07:26,541 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 264 flow [2024-11-17 03:07:26,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 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) [2024-11-17 03:07:26,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:26,541 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:26,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:07:26,541 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-17 03:07:26,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:26,542 INFO L85 PathProgramCache]: Analyzing trace with hash -918609407, now seen corresponding path program 1 times [2024-11-17 03:07:26,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:26,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899017802] [2024-11-17 03:07:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:26,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-17 03:07:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:26,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899017802] [2024-11-17 03:07:26,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899017802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:26,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:26,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:07:26,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255406475] [2024-11-17 03:07:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:26,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:07:26,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:07:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:07:26,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 93 [2024-11-17 03:07:26,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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) [2024-11-17 03:07:26,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:26,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 93 [2024-11-17 03:07:26,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:31,129 INFO L124 PetriNetUnfolderBase]: 31016/51706 cut-off events. [2024-11-17 03:07:31,130 INFO L125 PetriNetUnfolderBase]: For 8380/8380 co-relation queries the response was YES. [2024-11-17 03:07:31,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101318 conditions, 51706 events. 31016/51706 cut-off events. For 8380/8380 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 434537 event pairs, 9031 based on Foata normal form. 594/51295 useless extension candidates. Maximal degree in co-relation 101296. Up to 17136 conditions per place. [2024-11-17 03:07:31,473 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 103 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2024-11-17 03:07:31,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 137 transitions, 638 flow [2024-11-17 03:07:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:07:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:07:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-17 03:07:31,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5956989247311828 [2024-11-17 03:07:31,475 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 264 flow. Second operand 5 states and 277 transitions. [2024-11-17 03:07:31,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 137 transitions, 638 flow [2024-11-17 03:07:31,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 137 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:07:31,483 INFO L231 Difference]: Finished difference. Result has 102 places, 81 transitions, 290 flow [2024-11-17 03:07:31,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=102, PETRI_TRANSITIONS=81} [2024-11-17 03:07:31,484 INFO L277 CegarLoopForPetriNet]: 85 programPoint places, 17 predicate places. [2024-11-17 03:07:31,484 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 81 transitions, 290 flow [2024-11-17 03:07:31,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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) [2024-11-17 03:07:31,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:31,484 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:07:31,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:07:31,485 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-17 03:07:31,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash -794596838, now seen corresponding path program 1 times [2024-11-17 03:07:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462863311] [2024-11-17 03:07:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:31,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:07:31,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:07:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:07:31,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:07:31,508 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-11-17 03:07:31,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-11-17 03:07:31,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2024-11-17 03:07:31,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-11-17 03:07:31,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-11-17 03:07:31,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-11-17 03:07:31,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2024-11-17 03:07:31,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2024-11-17 03:07:31,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-11-17 03:07:31,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 03:07:31,510 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2024-11-17 03:07:31,511 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:07:31,511 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-17 03:07:31,533 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:07:31,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 118 transitions, 264 flow [2024-11-17 03:07:31,542 INFO L124 PetriNetUnfolderBase]: 23/149 cut-off events. [2024-11-17 03:07:31,543 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-17 03:07:31,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 149 events. 23/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 434 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 124. Up to 10 conditions per place. [2024-11-17 03:07:31,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 118 transitions, 264 flow [2024-11-17 03:07:31,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 118 transitions, 264 flow [2024-11-17 03:07:31,545 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:07:31,546 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=None, 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;@2385d0ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:07:31,546 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-17 03:07:31,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:07:31,547 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:07:31,547 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:07:31,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:31,547 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:31,547 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-11-17 03:07:31,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash 16268792, now seen corresponding path program 1 times [2024-11-17 03:07:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:31,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555172121] [2024-11-17 03:07:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:31,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:31,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555172121] [2024-11-17 03:07:31,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555172121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:31,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:31,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762864263] [2024-11-17 03:07:31,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:31,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:31,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 118 [2024-11-17 03:07:31,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2024-11-17 03:07:31,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:31,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 118 [2024-11-17 03:07:31,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:07:45,160 INFO L124 PetriNetUnfolderBase]: 119632/182475 cut-off events. [2024-11-17 03:07:45,160 INFO L125 PetriNetUnfolderBase]: For 12850/12850 co-relation queries the response was YES. [2024-11-17 03:07:45,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340879 conditions, 182475 events. 119632/182475 cut-off events. For 12850/12850 co-relation queries the response was YES. Maximal size of possible extension queue 5522. Compared 1645122 event pairs, 106668 based on Foata normal form. 49624/228004 useless extension candidates. Maximal degree in co-relation 27420. Up to 152966 conditions per place. [2024-11-17 03:07:46,154 INFO L140 encePairwiseOnDemand]: 97/118 looper letters, 49 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2024-11-17 03:07:46,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 310 flow [2024-11-17 03:07:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:07:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:07:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2024-11-17 03:07:46,156 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5621468926553672 [2024-11-17 03:07:46,156 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 264 flow. Second operand 3 states and 199 transitions. [2024-11-17 03:07:46,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 310 flow [2024-11-17 03:07:46,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 91 transitions, 304 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-17 03:07:46,169 INFO L231 Difference]: Finished difference. Result has 97 places, 91 transitions, 206 flow [2024-11-17 03:07:46,173 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=118, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2024-11-17 03:07:46,174 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -11 predicate places. [2024-11-17 03:07:46,174 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 206 flow [2024-11-17 03:07:46,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2024-11-17 03:07:46,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:07:46,174 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:07:46,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:07:46,174 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-11-17 03:07:46,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:07:46,174 INFO L85 PathProgramCache]: Analyzing trace with hash 16268793, now seen corresponding path program 1 times [2024-11-17 03:07:46,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:07:46,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204713542] [2024-11-17 03:07:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:07:46,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:07:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:07:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:07:46,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:07:46,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204713542] [2024-11-17 03:07:46,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204713542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:07:46,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:07:46,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:07:46,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115031469] [2024-11-17 03:07:46,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:07:46,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:07:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:07:46,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:07:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:07:46,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 118 [2024-11-17 03:07:46,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 91 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2024-11-17 03:07:46,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:07:46,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 118 [2024-11-17 03:07:46,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand