./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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/weaver/chl-name-comparator-trans.wvr.c -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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:45:21,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:45:21,467 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:45:21,473 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:45:21,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:45:21,494 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:45:21,495 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:45:21,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:45:21,496 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:45:21,497 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:45:21,497 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:45:21,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:45:21,498 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:45:21,498 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:45:21,498 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:45:21,499 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:45:21,499 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:45:21,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:45:21,500 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:45:21,500 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:45:21,500 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:45:21,504 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:45:21,504 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:45:21,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:45:21,504 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:45:21,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:45:21,505 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:45:21,505 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:45:21,505 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:45:21,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:45:21,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:45:21,506 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:45:21,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:45:21,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:21,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:45:21,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:45:21,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:45:21,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:45:21,511 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:45:21,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:45:21,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:45:21,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:45:21,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2024-11-19 09:45:21,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:45:21,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:45:21,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:45:21,807 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:45:21,808 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:45:21,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-11-19 09:45:23,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:45:23,502 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:45:23,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-11-19 09:45:23,514 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2928694/3d1269168bf2436bbf558ea380c93dd7/FLAG3ad52144a [2024-11-19 09:45:23,527 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2928694/3d1269168bf2436bbf558ea380c93dd7 [2024-11-19 09:45:23,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:45:23,531 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:45:23,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:23,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:45:23,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:45:23,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0f59d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23, skipping insertion in model container [2024-11-19 09:45:23,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,569 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:45:23,792 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:45:23,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:23,808 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:45:23,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:23,871 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:45:23,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23 WrapperNode [2024-11-19 09:45:23,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:23,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:23,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:45:23,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:45:23,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,932 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 306 [2024-11-19 09:45:23,932 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:23,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:45:23,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:45:23,933 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:45:23,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,949 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,968 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:45:23,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,978 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,982 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,984 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:23,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:45:23,993 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:45:23,993 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:45:23,993 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:45:23,994 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (1/1) ... [2024-11-19 09:45:24,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:24,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:24,038 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) [2024-11-19 09:45:24,041 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 [2024-11-19 09:45:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:45:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:45:24,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:45:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:45:24,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:45:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:45:24,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:45:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:45:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:45:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:45:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:45:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:45:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:45:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:45:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:45:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:45:24,096 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:45:24,273 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:45:24,307 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:45:24,788 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:45:24,788 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:45:25,237 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:45:25,237 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:45:25,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:25 BoogieIcfgContainer [2024-11-19 09:45:25,238 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:45:25,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:45:25,241 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:45:25,245 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:45:25,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:45:23" (1/3) ... [2024-11-19 09:45:25,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b47349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:25, skipping insertion in model container [2024-11-19 09:45:25,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:23" (2/3) ... [2024-11-19 09:45:25,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b47349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:25, skipping insertion in model container [2024-11-19 09:45:25,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:25" (3/3) ... [2024-11-19 09:45:25,248 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-11-19 09:45:25,277 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:45:25,277 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 09:45:25,277 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:45:25,415 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:45:25,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 50 transitions, 121 flow [2024-11-19 09:45:25,486 INFO L124 PetriNetUnfolderBase]: 7/47 cut-off events. [2024-11-19 09:45:25,486 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:45:25,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 7/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-19 09:45:25,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 50 transitions, 121 flow [2024-11-19 09:45:25,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 46 transitions, 110 flow [2024-11-19 09:45:25,508 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:45:25,514 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;@15e4ff79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:45:25,515 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-19 09:45:25,518 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:45:25,519 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:45:25,519 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:45:25,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:25,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:25,521 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:25,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash 925738, now seen corresponding path program 1 times [2024-11-19 09:45:25,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987110068] [2024-11-19 09:45:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:25,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:25,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987110068] [2024-11-19 09:45:25,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987110068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:25,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:25,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:45:25,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101045498] [2024-11-19 09:45:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:25,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:45:25,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:45:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:45:25,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:25,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-19 09:45:25,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:25,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:25,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:26,331 INFO L124 PetriNetUnfolderBase]: 1316/2109 cut-off events. [2024-11-19 09:45:26,332 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-11-19 09:45:26,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 2109 events. 1316/2109 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10175 event pairs, 1060 based on Foata normal form. 1/1740 useless extension candidates. Maximal degree in co-relation 3816. Up to 1877 conditions per place. [2024-11-19 09:45:26,353 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-19 09:45:26,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 162 flow [2024-11-19 09:45:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-19 09:45:26,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-19 09:45:26,368 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 110 flow. Second operand 3 states and 73 transitions. [2024-11-19 09:45:26,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 162 flow [2024-11-19 09:45:26,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:45:26,378 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 90 flow [2024-11-19 09:45:26,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-19 09:45:26,384 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-11-19 09:45:26,385 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 90 flow [2024-11-19 09:45:26,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-19 09:45:26,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:26,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:26,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:45:26,386 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:26,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 925739, now seen corresponding path program 1 times [2024-11-19 09:45:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:26,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998648680] [2024-11-19 09:45:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:26,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:26,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998648680] [2024-11-19 09:45:26,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998648680] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:26,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:26,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:45:26,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539970086] [2024-11-19 09:45:26,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:26,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:26,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:26,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:26,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2024-11-19 09:45:26,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:26,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:26,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:27,036 INFO L124 PetriNetUnfolderBase]: 1316/2111 cut-off events. [2024-11-19 09:45:27,037 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:45:27,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4041 conditions, 2111 events. 1316/2111 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10172 event pairs, 1060 based on Foata normal form. 1/1742 useless extension candidates. Maximal degree in co-relation 4022. Up to 1881 conditions per place. [2024-11-19 09:45:27,048 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 33 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2024-11-19 09:45:27,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 164 flow [2024-11-19 09:45:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-19 09:45:27,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-19 09:45:27,050 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 90 flow. Second operand 3 states and 73 transitions. [2024-11-19 09:45:27,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 164 flow [2024-11-19 09:45:27,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:27,052 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 100 flow [2024-11-19 09:45:27,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-19 09:45:27,053 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2024-11-19 09:45:27,054 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 100 flow [2024-11-19 09:45:27,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2024-11-19 09:45:27,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:27,054 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:45:27,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:45:27,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:27,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash 889664305, now seen corresponding path program 1 times [2024-11-19 09:45:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:27,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211151066] [2024-11-19 09:45:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:27,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:27,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:27,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211151066] [2024-11-19 09:45:27,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211151066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:27,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86596423] [2024-11-19 09:45:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:27,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:27,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:27,305 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) [2024-11-19 09:45:27,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:45:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:27,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:45:27,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:27,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:45:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:27,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:27,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86596423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:27,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-19 09:45:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987756636] [2024-11-19 09:45:27,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:27,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:45:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:45:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:45:27,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:27,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 100 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 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) [2024-11-19 09:45:27,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:27,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:27,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:28,084 INFO L124 PetriNetUnfolderBase]: 1318/2117 cut-off events. [2024-11-19 09:45:28,085 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:45:28,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 2117 events. 1318/2117 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10194 event pairs, 1060 based on Foata normal form. 0/1747 useless extension candidates. Maximal degree in co-relation 4049. Up to 1883 conditions per place. [2024-11-19 09:45:28,097 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 35 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2024-11-19 09:45:28,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 204 flow [2024-11-19 09:45:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-19 09:45:28,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.412 [2024-11-19 09:45:28,101 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 100 flow. Second operand 5 states and 103 transitions. [2024-11-19 09:45:28,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 204 flow [2024-11-19 09:45:28,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:45:28,104 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 140 flow [2024-11-19 09:45:28,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-19 09:45:28,105 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2024-11-19 09:45:28,105 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 140 flow [2024-11-19 09:45:28,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 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) [2024-11-19 09:45:28,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:28,106 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2024-11-19 09:45:28,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:45:28,310 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 [2024-11-19 09:45:28,311 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:28,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 747879613, now seen corresponding path program 2 times [2024-11-19 09:45:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:28,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639196194] [2024-11-19 09:45:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:28,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:28,332 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:28,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:28,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:28,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639196194] [2024-11-19 09:45:28,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639196194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:28,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780168276] [2024-11-19 09:45:28,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:28,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:28,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:28,439 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) [2024-11-19 09:45:28,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:45:28,525 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:28,526 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:28,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:45:28,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:28,602 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780168276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:28,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:28,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-19 09:45:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139955434] [2024-11-19 09:45:28,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:28,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:28,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:28,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:28,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:45:28,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:45:28,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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) [2024-11-19 09:45:28,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:28,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:45:28,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:28,902 INFO L124 PetriNetUnfolderBase]: 1317/2114 cut-off events. [2024-11-19 09:45:28,902 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-19 09:45:28,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 2114 events. 1317/2114 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10181 event pairs, 1060 based on Foata normal form. 1/1746 useless extension candidates. Maximal degree in co-relation 4039. Up to 1879 conditions per place. [2024-11-19 09:45:28,914 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 31 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-11-19 09:45:28,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 206 flow [2024-11-19 09:45:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-19 09:45:28,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-19 09:45:28,917 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 140 flow. Second operand 6 states and 117 transitions. [2024-11-19 09:45:28,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 206 flow [2024-11-19 09:45:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 186 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:28,920 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 124 flow [2024-11-19 09:45:28,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-19 09:45:28,922 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-11-19 09:45:28,922 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 124 flow [2024-11-19 09:45:28,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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) [2024-11-19 09:45:28,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:28,923 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:28,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:45:29,123 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 [2024-11-19 09:45:29,124 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:29,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:29,125 INFO L85 PathProgramCache]: Analyzing trace with hash 826344425, now seen corresponding path program 1 times [2024-11-19 09:45:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:29,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221558876] [2024-11-19 09:45:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:29,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:29,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:29,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221558876] [2024-11-19 09:45:29,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221558876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:29,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:29,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478331984] [2024-11-19 09:45:29,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:29,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:29,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:45:29,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:29,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:29,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:45:29,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:29,459 INFO L124 PetriNetUnfolderBase]: 1317/2000 cut-off events. [2024-11-19 09:45:29,459 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-19 09:45:29,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 2000 events. 1317/2000 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8571 event pairs, 1060 based on Foata normal form. 0/1745 useless extension candidates. Maximal degree in co-relation 3916. Up to 1878 conditions per place. [2024-11-19 09:45:29,469 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-19 09:45:29,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 190 flow [2024-11-19 09:45:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:45:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:45:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-19 09:45:29,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-19 09:45:29,473 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 124 flow. Second operand 4 states and 71 transitions. [2024-11-19 09:45:29,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 190 flow [2024-11-19 09:45:29,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 172 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-19 09:45:29,476 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 108 flow [2024-11-19 09:45:29,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-19 09:45:29,477 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2024-11-19 09:45:29,478 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 108 flow [2024-11-19 09:45:29,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:29,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:29,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:29,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:45:29,479 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:29,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash 826344426, now seen corresponding path program 1 times [2024-11-19 09:45:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:29,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595186764] [2024-11-19 09:45:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:29,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595186764] [2024-11-19 09:45:29,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595186764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123774384] [2024-11-19 09:45:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:29,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:29,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:29,559 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) [2024-11-19 09:45:29,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:45:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:29,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:45:29,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:29,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:29,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123774384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:29,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:29,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-19 09:45:29,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909345161] [2024-11-19 09:45:29,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:29,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:45:29,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:45:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:45:29,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:45:29,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 108 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 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) [2024-11-19 09:45:29,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:29,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:45:29,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:30,005 INFO L124 PetriNetUnfolderBase]: 1315/1998 cut-off events. [2024-11-19 09:45:30,005 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:45:30,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 1998 events. 1315/1998 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8567 event pairs, 1060 based on Foata normal form. 2/1745 useless extension candidates. Maximal degree in co-relation 3908. Up to 1878 conditions per place. [2024-11-19 09:45:30,015 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-19 09:45:30,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 178 flow [2024-11-19 09:45:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-19 09:45:30,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.412 [2024-11-19 09:45:30,017 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 108 flow. Second operand 5 states and 103 transitions. [2024-11-19 09:45:30,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 178 flow [2024-11-19 09:45:30,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:30,018 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 103 flow [2024-11-19 09:45:30,018 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-11-19 09:45:30,019 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2024-11-19 09:45:30,019 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 103 flow [2024-11-19 09:45:30,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 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) [2024-11-19 09:45:30,019 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:30,020 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:30,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:45:30,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:30,224 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:30,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 353757046, now seen corresponding path program 2 times [2024-11-19 09:45:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357061227] [2024-11-19 09:45:30,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:30,245 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:30,245 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:30,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:30,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357061227] [2024-11-19 09:45:30,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357061227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:30,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:30,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:30,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058655269] [2024-11-19 09:45:30,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:30,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:30,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:30,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:30,421 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:30,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-19 09:45:30,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:30,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:30,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:30,870 INFO L124 PetriNetUnfolderBase]: 2629/3831 cut-off events. [2024-11-19 09:45:30,870 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-19 09:45:30,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7690 conditions, 3831 events. 2629/3831 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17826 event pairs, 1240 based on Foata normal form. 0/3235 useless extension candidates. Maximal degree in co-relation 7661. Up to 2168 conditions per place. [2024-11-19 09:45:30,892 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 57 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2024-11-19 09:45:30,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 282 flow [2024-11-19 09:45:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-19 09:45:30,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-19 09:45:30,894 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 103 flow. Second operand 5 states and 120 transitions. [2024-11-19 09:45:30,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 282 flow [2024-11-19 09:45:30,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:30,896 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 111 flow [2024-11-19 09:45:30,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-19 09:45:30,899 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-19 09:45:30,900 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 111 flow [2024-11-19 09:45:30,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-19 09:45:30,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:30,900 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:30,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:45:30,900 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:30,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash 170638280, now seen corresponding path program 1 times [2024-11-19 09:45:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:30,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859679291] [2024-11-19 09:45:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:30,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:45:31,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859679291] [2024-11-19 09:45:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859679291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954271562] [2024-11-19 09:45:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:31,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:31,149 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) [2024-11-19 09:45:31,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:45:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:31,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:45:31,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:31,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:31,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:45:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954271562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:31,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:31,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2024-11-19 09:45:31,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173277747] [2024-11-19 09:45:31,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:31,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:45:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:45:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:45:31,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:31,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 111 flow. Second operand has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 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) [2024-11-19 09:45:31,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:31,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:31,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:33,101 INFO L124 PetriNetUnfolderBase]: 6825/9781 cut-off events. [2024-11-19 09:45:33,101 INFO L125 PetriNetUnfolderBase]: For 1389/1619 co-relation queries the response was YES. [2024-11-19 09:45:33,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20687 conditions, 9781 events. 6825/9781 cut-off events. For 1389/1619 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 49247 event pairs, 2385 based on Foata normal form. 0/8223 useless extension candidates. Maximal degree in co-relation 20655. Up to 4022 conditions per place. [2024-11-19 09:45:33,178 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 81 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2024-11-19 09:45:33,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 91 transitions, 419 flow [2024-11-19 09:45:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:45:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:45:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-11-19 09:45:33,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-11-19 09:45:33,180 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 111 flow. Second operand 8 states and 183 transitions. [2024-11-19 09:45:33,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 91 transitions, 419 flow [2024-11-19 09:45:33,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:33,186 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 133 flow [2024-11-19 09:45:33,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=133, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-11-19 09:45:33,187 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-11-19 09:45:33,187 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 133 flow [2024-11-19 09:45:33,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 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) [2024-11-19 09:45:33,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:33,189 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:33,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:33,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:33,390 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:33,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1072652486, now seen corresponding path program 1 times [2024-11-19 09:45:33,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:33,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357297439] [2024-11-19 09:45:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:33,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:33,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:33,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357297439] [2024-11-19 09:45:33,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357297439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:33,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819027558] [2024-11-19 09:45:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:33,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:33,733 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) [2024-11-19 09:45:33,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:45:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:33,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:45:33,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:33,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:34,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:45:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:34,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819027558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:34,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-19 09:45:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938379919] [2024-11-19 09:45:34,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:34,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:45:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:45:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:45:34,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:34,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 133 flow. Second operand has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:34,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:34,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:34,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:36,919 INFO L124 PetriNetUnfolderBase]: 12853/18397 cut-off events. [2024-11-19 09:45:36,919 INFO L125 PetriNetUnfolderBase]: For 2839/2839 co-relation queries the response was YES. [2024-11-19 09:45:36,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40509 conditions, 18397 events. 12853/18397 cut-off events. For 2839/2839 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 102197 event pairs, 3460 based on Foata normal form. 0/15491 useless extension candidates. Maximal degree in co-relation 40473. Up to 5736 conditions per place. [2024-11-19 09:45:37,018 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2024-11-19 09:45:37,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 126 transitions, 608 flow [2024-11-19 09:45:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:45:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:45:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-19 09:45:37,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-19 09:45:37,020 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 133 flow. Second operand 9 states and 225 transitions. [2024-11-19 09:45:37,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 126 transitions, 608 flow [2024-11-19 09:45:37,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 126 transitions, 601 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:37,026 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 160 flow [2024-11-19 09:45:37,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2024-11-19 09:45:37,028 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-11-19 09:45:37,028 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 160 flow [2024-11-19 09:45:37,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:37,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:37,028 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:37,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:45:37,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:37,229 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:37,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:37,230 INFO L85 PathProgramCache]: Analyzing trace with hash -383312668, now seen corresponding path program 1 times [2024-11-19 09:45:37,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:37,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446296061] [2024-11-19 09:45:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:37,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:37,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446296061] [2024-11-19 09:45:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446296061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:37,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445711147] [2024-11-19 09:45:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:37,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:37,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:37,481 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) [2024-11-19 09:45:37,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:45:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:37,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:45:37,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:37,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:37,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:45:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:37,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445711147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:37,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:37,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-19 09:45:37,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667865244] [2024-11-19 09:45:37,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:37,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:45:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:45:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:45:37,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:37,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 160 flow. Second operand has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 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) [2024-11-19 09:45:37,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:37,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:37,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:42,297 INFO L124 PetriNetUnfolderBase]: 32327/46067 cut-off events. [2024-11-19 09:45:42,297 INFO L125 PetriNetUnfolderBase]: For 20063/20479 co-relation queries the response was YES. [2024-11-19 09:45:42,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104651 conditions, 46067 events. 32327/46067 cut-off events. For 20063/20479 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 277626 event pairs, 12757 based on Foata normal form. 0/38291 useless extension candidates. Maximal degree in co-relation 104612. Up to 20102 conditions per place. [2024-11-19 09:45:42,565 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2024-11-19 09:45:42,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 546 flow [2024-11-19 09:45:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:45:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:45:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-11-19 09:45:42,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-11-19 09:45:42,568 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 160 flow. Second operand 8 states and 179 transitions. [2024-11-19 09:45:42,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 546 flow [2024-11-19 09:45:42,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 521 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-19 09:45:42,580 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 175 flow [2024-11-19 09:45:42,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2024-11-19 09:45:42,582 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2024-11-19 09:45:42,582 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 175 flow [2024-11-19 09:45:42,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 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) [2024-11-19 09:45:42,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:42,583 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:42,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:45:42,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:42,784 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:42,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:42,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1973150936, now seen corresponding path program 1 times [2024-11-19 09:45:42,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:42,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024120047] [2024-11-19 09:45:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:42,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:43,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:43,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024120047] [2024-11-19 09:45:43,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024120047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:43,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876740250] [2024-11-19 09:45:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:43,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:43,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:43,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:45:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:43,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:45:43,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:43,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:43,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:45:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876740250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:43,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-19 09:45:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730336896] [2024-11-19 09:45:43,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:43,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:45:43,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:45:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:45:44,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:44,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 175 flow. Second operand has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 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) [2024-11-19 09:45:44,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:44,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:44,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:50,246 INFO L124 PetriNetUnfolderBase]: 41923/59631 cut-off events. [2024-11-19 09:45:50,247 INFO L125 PetriNetUnfolderBase]: For 24478/25126 co-relation queries the response was YES. [2024-11-19 09:45:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139836 conditions, 59631 events. 41923/59631 cut-off events. For 24478/25126 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 370301 event pairs, 12007 based on Foata normal form. 778/51213 useless extension candidates. Maximal degree in co-relation 139794. Up to 18928 conditions per place. [2024-11-19 09:45:50,590 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 121 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-19 09:45:50,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 715 flow [2024-11-19 09:45:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:45:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:45:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-11-19 09:45:50,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2024-11-19 09:45:50,591 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 175 flow. Second operand 9 states and 218 transitions. [2024-11-19 09:45:50,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 715 flow [2024-11-19 09:45:50,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 708 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:50,691 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 194 flow [2024-11-19 09:45:50,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2024-11-19 09:45:50,692 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2024-11-19 09:45:50,692 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 194 flow [2024-11-19 09:45:50,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 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) [2024-11-19 09:45:50,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:50,693 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-19 09:45:50,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:50,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:50,894 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:50,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash -361073222, now seen corresponding path program 2 times [2024-11-19 09:45:50,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:50,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395034489] [2024-11-19 09:45:50,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:50,914 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:50,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:51,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395034489] [2024-11-19 09:45:51,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395034489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442218640] [2024-11-19 09:45:51,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:51,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:51,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:51,236 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:51,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:45:51,328 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:51,328 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:51,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:45:51,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:51,376 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:51,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442218640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:51,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:51,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2024-11-19 09:45:51,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356439662] [2024-11-19 09:45:51,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:51,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:45:51,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:45:51,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2024-11-19 09:45:51,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:51,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:45:51,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:56,541 INFO L124 PetriNetUnfolderBase]: 37549/53687 cut-off events. [2024-11-19 09:45:56,542 INFO L125 PetriNetUnfolderBase]: For 29503/30179 co-relation queries the response was YES. [2024-11-19 09:45:56,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128219 conditions, 53687 events. 37549/53687 cut-off events. For 29503/30179 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 338761 event pairs, 975 based on Foata normal form. 0/45743 useless extension candidates. Maximal degree in co-relation 128175. Up to 13570 conditions per place. [2024-11-19 09:45:56,877 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 148 selfloop transitions, 4 changer transitions 0/155 dead transitions. [2024-11-19 09:45:56,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 155 transitions, 875 flow [2024-11-19 09:45:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-11-19 09:45:56,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-19 09:45:56,879 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 194 flow. Second operand 6 states and 204 transitions. [2024-11-19 09:45:56,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 155 transitions, 875 flow [2024-11-19 09:45:57,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 155 transitions, 818 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-11-19 09:45:57,021 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 166 flow [2024-11-19 09:45:57,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2024-11-19 09:45:57,022 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-11-19 09:45:57,022 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 166 flow [2024-11-19 09:45:57,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2024-11-19 09:45:57,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:57,022 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:57,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:57,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:45:57,224 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:57,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:57,224 INFO L85 PathProgramCache]: Analyzing trace with hash 379576996, now seen corresponding path program 1 times [2024-11-19 09:45:57,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:57,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020201089] [2024-11-19 09:45:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:57,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:57,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:57,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020201089] [2024-11-19 09:45:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020201089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170385921] [2024-11-19 09:45:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:57,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:57,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:45:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:57,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:45:57,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:57,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:57,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:45:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170385921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:58,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:58,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-19 09:45:58,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492750728] [2024-11-19 09:45:58,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:58,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:45:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:45:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:45:58,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:58,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 166 flow. Second operand has 26 states, 26 states have (on average 14.653846153846153) internal successors, (381), 26 states have internal predecessors, (381), 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) [2024-11-19 09:45:58,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:58,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:58,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:05,288 INFO L124 PetriNetUnfolderBase]: 51001/72889 cut-off events. [2024-11-19 09:46:05,288 INFO L125 PetriNetUnfolderBase]: For 36413/37205 co-relation queries the response was YES. [2024-11-19 09:46:05,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173644 conditions, 72889 events. 51001/72889 cut-off events. For 36413/37205 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 460826 event pairs, 16083 based on Foata normal form. 940/66037 useless extension candidates. Maximal degree in co-relation 173607. Up to 24864 conditions per place. [2024-11-19 09:46:05,876 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2024-11-19 09:46:05,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 694 flow [2024-11-19 09:46:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-11-19 09:46:05,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2024-11-19 09:46:05,878 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 166 flow. Second operand 9 states and 212 transitions. [2024-11-19 09:46:05,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 694 flow [2024-11-19 09:46:06,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 666 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:46:06,034 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 185 flow [2024-11-19 09:46:06,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2024-11-19 09:46:06,035 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2024-11-19 09:46:06,035 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 185 flow [2024-11-19 09:46:06,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.653846153846153) internal successors, (381), 26 states have internal predecessors, (381), 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) [2024-11-19 09:46:06,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:06,036 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:06,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:46:06,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 09:46:06,240 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:46:06,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1216177871, now seen corresponding path program 2 times [2024-11-19 09:46:06,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:06,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938174537] [2024-11-19 09:46:06,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:46:06,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:06,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:46:06,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:06,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938174537] [2024-11-19 09:46:06,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938174537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:06,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118530685] [2024-11-19 09:46:06,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:46:06,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:06,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:06,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:46:06,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:46:06,650 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:46:06,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:06,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:46:06,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:06,698 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:46:06,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118530685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:06,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:46:06,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2024-11-19 09:46:06,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275278018] [2024-11-19 09:46:06,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:06,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:46:06,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:06,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:46:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:06,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:46:06,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2024-11-19 09:46:06,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:06,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:46:06,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand