./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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/popl20-simple-array-sum.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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:51:43,903 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:51:43,983 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:51:43,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:51:43,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:51:44,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:51:44,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:51:44,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:51:44,016 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:51:44,018 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:51:44,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:51:44,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:51:44,019 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:51:44,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:51:44,020 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:51:44,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:51:44,022 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:51:44,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:51:44,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:51:44,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:51:44,023 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:51:44,023 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:51:44,024 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:51:44,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:51:44,024 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:51:44,024 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:51:44,025 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:51:44,025 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:51:44,026 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:51:44,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:51:44,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:51:44,027 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:51:44,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:51:44,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:44,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:51:44,028 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:51:44,028 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:51:44,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:51:44,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:51:44,029 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:51:44,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:51:44,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:51:44,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2024-11-22 21:51:44,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:51:44,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:51:44,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:51:44,265 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:51:44,265 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:51:44,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-22 21:51:45,500 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:51:45,652 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:51:45,652 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-22 21:51:45,663 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cd52fa93/7831da74dd5740b386eb4fc6243db48a/FLAGa6bb9e08f [2024-11-22 21:51:46,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cd52fa93/7831da74dd5740b386eb4fc6243db48a [2024-11-22 21:51:46,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:51:46,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:51:46,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:46,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:51:46,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:51:46,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d02acd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46, skipping insertion in model container [2024-11-22 21:51:46,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,096 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:51:46,317 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:51:46,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:46,350 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:51:46,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:46,389 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:51:46,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46 WrapperNode [2024-11-22 21:51:46,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:46,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:46,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:51:46,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:51:46,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,418 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 111 [2024-11-22 21:51:46,419 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:46,419 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:51:46,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:51:46,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:51:46,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,441 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-22 21:51:46,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,448 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,450 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,457 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:51:46,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:51:46,463 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:51:46,463 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:51:46,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (1/1) ... [2024-11-22 21:51:46,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:46,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:46,499 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) [2024-11-22 21:51:46,508 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 [2024-11-22 21:51:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:51:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:51:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:51:46,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:51:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:51:46,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:51:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:51:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:51:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:51:46,557 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:51:46,646 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:51:46,647 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:51:46,912 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:51:46,912 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:51:47,091 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:51:47,091 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-22 21:51:47,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:47 BoogieIcfgContainer [2024-11-22 21:51:47,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:51:47,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:51:47,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:51:47,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:51:47,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:51:46" (1/3) ... [2024-11-22 21:51:47,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5319f4dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:47, skipping insertion in model container [2024-11-22 21:51:47,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:46" (2/3) ... [2024-11-22 21:51:47,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5319f4dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:47, skipping insertion in model container [2024-11-22 21:51:47,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:47" (3/3) ... [2024-11-22 21:51:47,098 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-11-22 21:51:47,111 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:51:47,111 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-22 21:51:47,111 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:51:47,164 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:51:47,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 135 flow [2024-11-22 21:51:47,237 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-11-22 21:51:47,237 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:51:47,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 6/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 3 conditions per place. [2024-11-22 21:51:47,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 135 flow [2024-11-22 21:51:47,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 124 flow [2024-11-22 21:51:47,258 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:51:47,263 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;@4252a0d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:51:47,264 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-22 21:51:47,267 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:51:47,267 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:51:47,267 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:47,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:47,268 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:47,268 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:47,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:47,272 INFO L85 PathProgramCache]: Analyzing trace with hash 496711, now seen corresponding path program 1 times [2024-11-22 21:51:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:47,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249058454] [2024-11-22 21:51:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:47,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249058454] [2024-11-22 21:51:47,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249058454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:47,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:47,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:47,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398162474] [2024-11-22 21:51:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:47,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:47,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:47,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:51:47,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-22 21:51:47,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:47,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:51:47,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:47,862 INFO L124 PetriNetUnfolderBase]: 2001/3129 cut-off events. [2024-11-22 21:51:47,863 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-11-22 21:51:47,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6117 conditions, 3129 events. 2001/3129 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18505 event pairs, 1627 based on Foata normal form. 1/2095 useless extension candidates. Maximal degree in co-relation 5678. Up to 2795 conditions per place. [2024-11-22 21:51:47,882 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 36 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-11-22 21:51:47,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 192 flow [2024-11-22 21:51:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-22 21:51:47,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2024-11-22 21:51:47,893 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 86 transitions. [2024-11-22 21:51:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 192 flow [2024-11-22 21:51:47,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:51:47,899 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 108 flow [2024-11-22 21:51:47,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-22 21:51:47,903 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2024-11-22 21:51:47,903 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 108 flow [2024-11-22 21:51:47,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-22 21:51:47,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:47,903 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:47,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:51:47,904 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:47,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash 496712, now seen corresponding path program 1 times [2024-11-22 21:51:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:47,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637072454] [2024-11-22 21:51:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:48,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637072454] [2024-11-22 21:51:48,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637072454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:48,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:48,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:48,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411690186] [2024-11-22 21:51:48,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:48,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:48,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:48,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:51:48,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:48,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:48,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:51:48,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:48,367 INFO L124 PetriNetUnfolderBase]: 2002/3132 cut-off events. [2024-11-22 21:51:48,368 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-22 21:51:48,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6003 conditions, 3132 events. 2002/3132 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18475 event pairs, 1627 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 5974. Up to 2804 conditions per place. [2024-11-22 21:51:48,381 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-11-22 21:51:48,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 200 flow [2024-11-22 21:51:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-22 21:51:48,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-11-22 21:51:48,383 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 108 flow. Second operand 4 states and 104 transitions. [2024-11-22 21:51:48,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 200 flow [2024-11-22 21:51:48,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:48,385 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 131 flow [2024-11-22 21:51:48,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-11-22 21:51:48,386 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2024-11-22 21:51:48,386 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 131 flow [2024-11-22 21:51:48,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:48,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:48,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:51:48,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:51:48,387 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:48,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:48,388 INFO L85 PathProgramCache]: Analyzing trace with hash 15398679, now seen corresponding path program 1 times [2024-11-22 21:51:48,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:48,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979357977] [2024-11-22 21:51:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:48,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979357977] [2024-11-22 21:51:48,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979357977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:48,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:48,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:48,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440473964] [2024-11-22 21:51:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:48,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:48,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:48,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:51:48,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-22 21:51:48,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:48,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:51:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:48,730 INFO L124 PetriNetUnfolderBase]: 2003/3137 cut-off events. [2024-11-22 21:51:48,730 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-22 21:51:48,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 3137 events. 2003/3137 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18567 event pairs, 1627 based on Foata normal form. 0/2101 useless extension candidates. Maximal degree in co-relation 5983. Up to 2803 conditions per place. [2024-11-22 21:51:48,747 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 38 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-11-22 21:51:48,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 229 flow [2024-11-22 21:51:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-22 21:51:48,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-22 21:51:48,751 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 131 flow. Second operand 4 states and 114 transitions. [2024-11-22 21:51:48,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 229 flow [2024-11-22 21:51:48,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:48,753 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 162 flow [2024-11-22 21:51:48,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-22 21:51:48,755 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-11-22 21:51:48,755 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 162 flow [2024-11-22 21:51:48,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-22 21:51:48,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:48,756 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:51:48,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:51:48,756 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:48,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash 477356444, now seen corresponding path program 1 times [2024-11-22 21:51:48,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:48,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618221748] [2024-11-22 21:51:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:48,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618221748] [2024-11-22 21:51:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618221748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541765297] [2024-11-22 21:51:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:48,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:48,968 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) [2024-11-22 21:51:48,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:51:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:49,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:51:49,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:49,081 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 10 treesize of output 9 [2024-11-22 21:51:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:49,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541765297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:49,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:49,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:51:49,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595760091] [2024-11-22 21:51:49,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:49,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:51:49,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:51:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:51:49,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:51:49,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-22 21:51:49,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:49,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:51:49,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:49,696 INFO L124 PetriNetUnfolderBase]: 2003/3136 cut-off events. [2024-11-22 21:51:49,697 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-22 21:51:49,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6037 conditions, 3136 events. 2003/3136 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18491 event pairs, 1627 based on Foata normal form. 0/2103 useless extension candidates. Maximal degree in co-relation 5987. Up to 2805 conditions per place. [2024-11-22 21:51:49,716 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 38 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-11-22 21:51:49,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 248 flow [2024-11-22 21:51:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:51:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:51:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-11-22 21:51:49,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-22 21:51:49,719 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 162 flow. Second operand 6 states and 133 transitions. [2024-11-22 21:51:49,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 248 flow [2024-11-22 21:51:49,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:51:49,720 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 172 flow [2024-11-22 21:51:49,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-11-22 21:51:49,721 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2024-11-22 21:51:49,721 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 172 flow [2024-11-22 21:51:49,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-22 21:51:49,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:49,722 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:51:49,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:51:49,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:49,927 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:49,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1913148483, now seen corresponding path program 1 times [2024-11-22 21:51:49,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:49,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546468443] [2024-11-22 21:51:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:49,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546468443] [2024-11-22 21:51:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546468443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272988543] [2024-11-22 21:51:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:50,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:50,062 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) [2024-11-22 21:51:50,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:51:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:50,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:51:50,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:50,130 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 8 treesize of output 1 [2024-11-22 21:51:50,237 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:51:50,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-22 21:51:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:50,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:50,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272988543] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:50,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:51:50,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-22 21:51:50,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500454299] [2024-11-22 21:51:50,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:50,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:51:50,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:51:50,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:50,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:50,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:51:50,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:50,794 INFO L124 PetriNetUnfolderBase]: 4001/6231 cut-off events. [2024-11-22 21:51:50,794 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-22 21:51:50,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11993 conditions, 6231 events. 4001/6231 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41029 event pairs, 3254 based on Foata normal form. 1/4186 useless extension candidates. Maximal degree in co-relation 5989. Up to 2802 conditions per place. [2024-11-22 21:51:50,820 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-22 21:51:50,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 398 flow [2024-11-22 21:51:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-22 21:51:50,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2024-11-22 21:51:50,822 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 172 flow. Second operand 5 states and 153 transitions. [2024-11-22 21:51:50,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 398 flow [2024-11-22 21:51:50,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 368 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:51:50,823 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 159 flow [2024-11-22 21:51:50,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-11-22 21:51:50,824 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2024-11-22 21:51:50,824 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 159 flow [2024-11-22 21:51:50,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:50,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:50,825 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:50,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:51:51,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:51,029 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:51,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:51,030 INFO L85 PathProgramCache]: Analyzing trace with hash -816515187, now seen corresponding path program 1 times [2024-11-22 21:51:51,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:51,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010523223] [2024-11-22 21:51:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:51,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:51,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010523223] [2024-11-22 21:51:51,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010523223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:51,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982312821] [2024-11-22 21:51:51,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:51,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:51,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:51:51,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2024-11-22 21:51:51,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:51,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:51:51,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:51,508 INFO L124 PetriNetUnfolderBase]: 4161/6521 cut-off events. [2024-11-22 21:51:51,508 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-22 21:51:51,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12643 conditions, 6521 events. 4161/6521 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41850 event pairs, 2949 based on Foata normal form. 0/4531 useless extension candidates. Maximal degree in co-relation 6885. Up to 3237 conditions per place. [2024-11-22 21:51:51,531 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 84 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2024-11-22 21:51:51,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 451 flow [2024-11-22 21:51:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:51:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:51:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-11-22 21:51:51,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-22 21:51:51,532 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 159 flow. Second operand 6 states and 190 transitions. [2024-11-22 21:51:51,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 451 flow [2024-11-22 21:51:51,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 102 transitions, 436 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:51,534 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 178 flow [2024-11-22 21:51:51,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-11-22 21:51:51,535 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2024-11-22 21:51:51,535 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 178 flow [2024-11-22 21:51:51,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2024-11-22 21:51:51,535 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:51,536 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:51,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:51:51,536 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:51,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 289705427, now seen corresponding path program 1 times [2024-11-22 21:51:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321668340] [2024-11-22 21:51:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:51,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:51,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321668340] [2024-11-22 21:51:51,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321668340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:51,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89913360] [2024-11-22 21:51:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:51,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:51,602 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) [2024-11-22 21:51:51,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:51:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:51,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:51:51,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:51,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89913360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:51,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:51,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:51:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841763167] [2024-11-22 21:51:51,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:51,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:51:51,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:51:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:51:51,787 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:51:51,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2024-11-22 21:51:51,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:51,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:51:51,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:52,451 INFO L124 PetriNetUnfolderBase]: 4902/7676 cut-off events. [2024-11-22 21:51:52,452 INFO L125 PetriNetUnfolderBase]: For 1250/1382 co-relation queries the response was YES. [2024-11-22 21:51:52,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15946 conditions, 7676 events. 4902/7676 cut-off events. For 1250/1382 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 50151 event pairs, 4053 based on Foata normal form. 1/5327 useless extension candidates. Maximal degree in co-relation 6230. Up to 4155 conditions per place. [2024-11-22 21:51:52,480 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 70 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-11-22 21:51:52,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 479 flow [2024-11-22 21:51:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:51:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:51:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-11-22 21:51:52,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2024-11-22 21:51:52,482 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 178 flow. Second operand 9 states and 240 transitions. [2024-11-22 21:51:52,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 479 flow [2024-11-22 21:51:52,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 462 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:51:52,486 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 260 flow [2024-11-22 21:51:52,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-11-22 21:51:52,487 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-11-22 21:51:52,490 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 260 flow [2024-11-22 21:51:52,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2024-11-22 21:51:52,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:52,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:52,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:51:52,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:52,691 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:52,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1274634225, now seen corresponding path program 1 times [2024-11-22 21:51:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:52,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126200342] [2024-11-22 21:51:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:52,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:52,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126200342] [2024-11-22 21:51:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126200342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:52,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:52,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024744983] [2024-11-22 21:51:52,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:52,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:52,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:52,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:51:52,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-11-22 21:51:52,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:52,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:51:52,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:53,193 INFO L124 PetriNetUnfolderBase]: 4680/7204 cut-off events. [2024-11-22 21:51:53,193 INFO L125 PetriNetUnfolderBase]: For 919/1197 co-relation queries the response was YES. [2024-11-22 21:51:53,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14817 conditions, 7204 events. 4680/7204 cut-off events. For 919/1197 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45064 event pairs, 3780 based on Foata normal form. 0/4999 useless extension candidates. Maximal degree in co-relation 6844. Up to 6213 conditions per place. [2024-11-22 21:51:53,269 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 75 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2024-11-22 21:51:53,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 518 flow [2024-11-22 21:51:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:51:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:51:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-11-22 21:51:53,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5116959064327485 [2024-11-22 21:51:53,271 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 260 flow. Second operand 6 states and 175 transitions. [2024-11-22 21:51:53,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 518 flow [2024-11-22 21:51:53,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 486 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-22 21:51:53,276 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 269 flow [2024-11-22 21:51:53,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2024-11-22 21:51:53,277 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-11-22 21:51:53,278 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 269 flow [2024-11-22 21:51:53,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-11-22 21:51:53,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:53,278 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-22 21:51:53,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:51:53,279 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:53,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash -858295041, now seen corresponding path program 2 times [2024-11-22 21:51:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:53,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372219203] [2024-11-22 21:51:53,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:53,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:53,299 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:53,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:53,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:53,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372219203] [2024-11-22 21:51:53,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372219203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:53,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606654508] [2024-11-22 21:51:53,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:53,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:53,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:53,504 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) [2024-11-22 21:51:53,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:51:53,551 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:53,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:53,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:51:53,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:53,568 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 8 treesize of output 1 [2024-11-22 21:51:53,661 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:51:53,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-22 21:51:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:53,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:53,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606654508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:53,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:53,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-22 21:51:53,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404268521] [2024-11-22 21:51:53,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:53,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:51:53,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:51:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:51:53,989 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:51:53,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 269 flow. Second operand has 16 states, 16 states have (on average 16.75) internal successors, (268), 16 states have internal predecessors, (268), 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) [2024-11-22 21:51:53,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:53,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:51:53,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:55,193 INFO L124 PetriNetUnfolderBase]: 6497/10222 cut-off events. [2024-11-22 21:51:55,194 INFO L125 PetriNetUnfolderBase]: For 2336/2842 co-relation queries the response was YES. [2024-11-22 21:51:55,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21925 conditions, 10222 events. 6497/10222 cut-off events. For 2336/2842 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 71312 event pairs, 5363 based on Foata normal form. 2/7332 useless extension candidates. Maximal degree in co-relation 12849. Up to 6010 conditions per place. [2024-11-22 21:51:55,238 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 72 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-11-22 21:51:55,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 569 flow [2024-11-22 21:51:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:51:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:51:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-11-22 21:51:55,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2024-11-22 21:51:55,239 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 269 flow. Second operand 11 states and 253 transitions. [2024-11-22 21:51:55,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 569 flow [2024-11-22 21:51:55,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 546 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:55,243 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 302 flow [2024-11-22 21:51:55,243 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=302, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-11-22 21:51:55,244 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2024-11-22 21:51:55,244 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 302 flow [2024-11-22 21:51:55,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.75) internal successors, (268), 16 states have internal predecessors, (268), 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) [2024-11-22 21:51:55,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:55,244 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:55,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:51:55,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:55,445 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:55,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:55,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2028017489, now seen corresponding path program 1 times [2024-11-22 21:51:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:55,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087624931] [2024-11-22 21:51:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:55,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:55,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:55,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087624931] [2024-11-22 21:51:55,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087624931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:55,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:55,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:55,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127878661] [2024-11-22 21:51:55,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:55,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:55,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:55,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:51:55,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-22 21:51:55,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:51:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:55,955 INFO L124 PetriNetUnfolderBase]: 4969/7960 cut-off events. [2024-11-22 21:51:55,955 INFO L125 PetriNetUnfolderBase]: For 2078/2372 co-relation queries the response was YES. [2024-11-22 21:51:55,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17497 conditions, 7960 events. 4969/7960 cut-off events. For 2078/2372 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 55130 event pairs, 4064 based on Foata normal form. 0/6193 useless extension candidates. Maximal degree in co-relation 5522. Up to 7145 conditions per place. [2024-11-22 21:51:55,987 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 46 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-11-22 21:51:55,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 65 transitions, 410 flow [2024-11-22 21:51:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-22 21:51:55,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39649122807017545 [2024-11-22 21:51:55,989 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 302 flow. Second operand 5 states and 113 transitions. [2024-11-22 21:51:55,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 65 transitions, 410 flow [2024-11-22 21:51:55,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 65 transitions, 370 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-22 21:51:55,994 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 278 flow [2024-11-22 21:51:55,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-11-22 21:51:55,995 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-11-22 21:51:55,995 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 278 flow [2024-11-22 21:51:55,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-22 21:51:55,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:55,995 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:55,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:51:55,995 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:55,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2028017490, now seen corresponding path program 1 times [2024-11-22 21:51:55,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:55,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729586381] [2024-11-22 21:51:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:55,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:56,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:56,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729586381] [2024-11-22 21:51:56,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729586381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:56,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815916618] [2024-11-22 21:51:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:56,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:56,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:56,097 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) [2024-11-22 21:51:56,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:51:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:56,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-22 21:51:56,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:56,154 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 [2024-11-22 21:51:56,159 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 8 treesize of output 1 [2024-11-22 21:51:56,201 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:51:56,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2024-11-22 21:51:56,228 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:51:56,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:51:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:56,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:56,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815916618] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:56,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:51:56,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-22 21:51:56,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783067179] [2024-11-22 21:51:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:56,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:51:56,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:51:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:51:56,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:51:56,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-22 21:51:56,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:56,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:51:56,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:57,243 INFO L124 PetriNetUnfolderBase]: 6190/9634 cut-off events. [2024-11-22 21:51:57,244 INFO L125 PetriNetUnfolderBase]: For 2326/2902 co-relation queries the response was YES. [2024-11-22 21:51:57,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21228 conditions, 9634 events. 6190/9634 cut-off events. For 2326/2902 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 63857 event pairs, 3332 based on Foata normal form. 0/7461 useless extension candidates. Maximal degree in co-relation 7519. Up to 5136 conditions per place. [2024-11-22 21:51:57,291 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 78 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-11-22 21:51:57,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 564 flow [2024-11-22 21:51:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:51:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:51:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-11-22 21:51:57,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5012531328320802 [2024-11-22 21:51:57,296 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 278 flow. Second operand 7 states and 200 transitions. [2024-11-22 21:51:57,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 564 flow [2024-11-22 21:51:57,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:51:57,302 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 319 flow [2024-11-22 21:51:57,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=319, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2024-11-22 21:51:57,303 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-11-22 21:51:57,303 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 319 flow [2024-11-22 21:51:57,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-22 21:51:57,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:57,303 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:57,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:51:57,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-22 21:51:57,507 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:57,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash -128109046, now seen corresponding path program 1 times [2024-11-22 21:51:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:57,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196562337] [2024-11-22 21:51:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:57,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:57,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:57,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196562337] [2024-11-22 21:51:57,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196562337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:57,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:57,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604953741] [2024-11-22 21:51:57,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:57,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:57,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:51:57,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-22 21:51:57,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:57,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:51:57,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:58,489 INFO L124 PetriNetUnfolderBase]: 9778/14988 cut-off events. [2024-11-22 21:51:58,489 INFO L125 PetriNetUnfolderBase]: For 14295/15573 co-relation queries the response was YES. [2024-11-22 21:51:58,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38275 conditions, 14988 events. 9778/14988 cut-off events. For 14295/15573 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 95408 event pairs, 2090 based on Foata normal form. 359/13328 useless extension candidates. Maximal degree in co-relation 13016. Up to 9010 conditions per place. [2024-11-22 21:51:58,597 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 101 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2024-11-22 21:51:58,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 703 flow [2024-11-22 21:51:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-22 21:51:58,599 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-11-22 21:51:58,599 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 319 flow. Second operand 4 states and 136 transitions. [2024-11-22 21:51:58,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 703 flow [2024-11-22 21:51:58,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 674 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:58,609 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 321 flow [2024-11-22 21:51:58,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-11-22 21:51:58,611 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-11-22 21:51:58,611 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 321 flow [2024-11-22 21:51:58,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-22 21:51:58,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:58,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:58,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 21:51:58,612 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:51:58,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1023631690, now seen corresponding path program 1 times [2024-11-22 21:51:58,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:58,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857126252] [2024-11-22 21:51:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:58,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:58,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:58,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857126252] [2024-11-22 21:51:58,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857126252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:58,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004277742] [2024-11-22 21:51:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:58,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:58,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:58,783 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) [2024-11-22 21:51:58,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:51:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:58,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-22 21:51:58,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:58,852 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 [2024-11-22 21:51:58,859 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 8 treesize of output 1 [2024-11-22 21:51:58,906 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:51:58,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2024-11-22 21:51:58,929 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:51:58,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:51:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:59,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:59,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004277742] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:59,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:51:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-22 21:51:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065131094] [2024-11-22 21:51:59,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:59,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:51:59,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:51:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:51:59,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:51:59,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2024-11-22 21:51:59,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:59,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:51:59,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:00,234 INFO L124 PetriNetUnfolderBase]: 8003/12362 cut-off events. [2024-11-22 21:52:00,235 INFO L125 PetriNetUnfolderBase]: For 11698/12793 co-relation queries the response was YES. [2024-11-22 21:52:00,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32896 conditions, 12362 events. 8003/12362 cut-off events. For 11698/12793 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81067 event pairs, 2432 based on Foata normal form. 0/10600 useless extension candidates. Maximal degree in co-relation 11266. Up to 6714 conditions per place. [2024-11-22 21:52:00,295 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 76 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-11-22 21:52:00,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 625 flow [2024-11-22 21:52:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:52:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:52:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-11-22 21:52:00,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2024-11-22 21:52:00,297 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 321 flow. Second operand 7 states and 192 transitions. [2024-11-22 21:52:00,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 625 flow [2024-11-22 21:52:00,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 103 transitions, 625 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:52:00,302 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 376 flow [2024-11-22 21:52:00,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=376, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2024-11-22 21:52:00,303 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-11-22 21:52:00,303 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 376 flow [2024-11-22 21:52:00,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2024-11-22 21:52:00,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:00,303 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:00,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:52:00,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:00,504 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:00,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1667810773, now seen corresponding path program 1 times [2024-11-22 21:52:00,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16565666] [2024-11-22 21:52:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:00,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16565666] [2024-11-22 21:52:00,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16565666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327102283] [2024-11-22 21:52:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:00,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:00,634 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) [2024-11-22 21:52:00,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:52:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:00,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:52:00,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:00,708 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 8 treesize of output 1 [2024-11-22 21:52:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:00,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327102283] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:00,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-11-22 21:52:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293018039] [2024-11-22 21:52:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:00,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:52:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:52:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:52:00,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:52:00,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-11-22 21:52:00,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:00,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:52:00,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:01,527 INFO L124 PetriNetUnfolderBase]: 7658/11885 cut-off events. [2024-11-22 21:52:01,527 INFO L125 PetriNetUnfolderBase]: For 14337/15363 co-relation queries the response was YES. [2024-11-22 21:52:01,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33934 conditions, 11885 events. 7658/11885 cut-off events. For 14337/15363 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 78265 event pairs, 3314 based on Foata normal form. 0/10535 useless extension candidates. Maximal degree in co-relation 11566. Up to 6750 conditions per place. [2024-11-22 21:52:01,598 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 78 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-11-22 21:52:01,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 105 transitions, 682 flow [2024-11-22 21:52:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-11-22 21:52:01,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-11-22 21:52:01,600 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 376 flow. Second operand 6 states and 180 transitions. [2024-11-22 21:52:01,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 105 transitions, 682 flow [2024-11-22 21:52:01,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 105 transitions, 654 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-22 21:52:01,609 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 397 flow [2024-11-22 21:52:01,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2024-11-22 21:52:01,609 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-11-22 21:52:01,610 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 397 flow [2024-11-22 21:52:01,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-11-22 21:52:01,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:01,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:01,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:52:01,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:01,811 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:01,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1667810774, now seen corresponding path program 1 times [2024-11-22 21:52:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:01,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135553316] [2024-11-22 21:52:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:01,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:01,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135553316] [2024-11-22 21:52:01,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135553316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:01,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:01,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:01,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639334398] [2024-11-22 21:52:01,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:01,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:01,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:01,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:52:01,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-11-22 21:52:01,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:01,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:52:01,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:02,367 INFO L124 PetriNetUnfolderBase]: 5873/9476 cut-off events. [2024-11-22 21:52:02,368 INFO L125 PetriNetUnfolderBase]: For 14233/14857 co-relation queries the response was YES. [2024-11-22 21:52:02,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29108 conditions, 9476 events. 5873/9476 cut-off events. For 14233/14857 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 60871 event pairs, 4358 based on Foata normal form. 384/9491 useless extension candidates. Maximal degree in co-relation 10940. Up to 8109 conditions per place. [2024-11-22 21:52:02,416 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 53 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-11-22 21:52:02,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 71 transitions, 513 flow [2024-11-22 21:52:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:52:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:52:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-22 21:52:02,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-11-22 21:52:02,417 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 397 flow. Second operand 4 states and 96 transitions. [2024-11-22 21:52:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 71 transitions, 513 flow [2024-11-22 21:52:02,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 71 transitions, 488 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:02,425 INFO L231 Difference]: Finished difference. Result has 87 places, 71 transitions, 382 flow [2024-11-22 21:52:02,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=382, PETRI_PLACES=87, PETRI_TRANSITIONS=71} [2024-11-22 21:52:02,426 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-11-22 21:52:02,426 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 71 transitions, 382 flow [2024-11-22 21:52:02,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-11-22 21:52:02,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:02,426 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:02,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:52:02,426 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:02,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash -635376150, now seen corresponding path program 1 times [2024-11-22 21:52:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:02,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758107268] [2024-11-22 21:52:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758107268] [2024-11-22 21:52:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758107268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7600158] [2024-11-22 21:52:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:02,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:02,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:02,491 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) [2024-11-22 21:52:02,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:52:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:02,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:52:02,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:02,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:02,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7600158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:02,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:02,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:52:02,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863536580] [2024-11-22 21:52:02,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:02,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:52:02,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:52:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:52:02,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:52:02,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 71 transitions, 382 flow. Second operand has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 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) [2024-11-22 21:52:02,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:02,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:52:02,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:03,362 INFO L124 PetriNetUnfolderBase]: 6345/10153 cut-off events. [2024-11-22 21:52:03,363 INFO L125 PetriNetUnfolderBase]: For 13870/14074 co-relation queries the response was YES. [2024-11-22 21:52:03,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30205 conditions, 10153 events. 6345/10153 cut-off events. For 13870/14074 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 63256 event pairs, 3329 based on Foata normal form. 244/9989 useless extension candidates. Maximal degree in co-relation 13657. Up to 3401 conditions per place. [2024-11-22 21:52:03,426 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 114 selfloop transitions, 24 changer transitions 0/148 dead transitions. [2024-11-22 21:52:03,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 148 transitions, 1002 flow [2024-11-22 21:52:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:52:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:52:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-11-22 21:52:03,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4807017543859649 [2024-11-22 21:52:03,428 INFO L175 Difference]: Start difference. First operand has 87 places, 71 transitions, 382 flow. Second operand 10 states and 274 transitions. [2024-11-22 21:52:03,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 148 transitions, 1002 flow [2024-11-22 21:52:03,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 148 transitions, 994 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:52:03,438 INFO L231 Difference]: Finished difference. Result has 97 places, 75 transitions, 475 flow [2024-11-22 21:52:03,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=475, PETRI_PLACES=97, PETRI_TRANSITIONS=75} [2024-11-22 21:52:03,439 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2024-11-22 21:52:03,439 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 75 transitions, 475 flow [2024-11-22 21:52:03,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 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) [2024-11-22 21:52:03,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:03,440 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:03,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:52:03,643 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,SelfDestructingSolverStorable15 [2024-11-22 21:52:03,643 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:03,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:03,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1712427686, now seen corresponding path program 2 times [2024-11-22 21:52:03,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:03,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056055101] [2024-11-22 21:52:03,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:03,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:03,657 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:03,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:52:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056055101] [2024-11-22 21:52:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056055101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093704323] [2024-11-22 21:52:03,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:03,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:03,852 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) [2024-11-22 21:52:03,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:52:03,909 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:03,909 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:03,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 21:52:03,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:03,915 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 10 treesize of output 9 [2024-11-22 21:52:03,972 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-22 21:52:03,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-22 21:52:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:04,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093704323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:04,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-22 21:52:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685078961] [2024-11-22 21:52:04,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:04,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:52:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:52:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:52:04,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 57 [2024-11-22 21:52:04,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 75 transitions, 475 flow. Second operand has 21 states, 21 states have (on average 14.380952380952381) internal successors, (302), 21 states have internal predecessors, (302), 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) [2024-11-22 21:52:04,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:04,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 57 [2024-11-22 21:52:04,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:06,521 INFO L124 PetriNetUnfolderBase]: 7816/11800 cut-off events. [2024-11-22 21:52:06,522 INFO L125 PetriNetUnfolderBase]: For 22135/22465 co-relation queries the response was YES. [2024-11-22 21:52:06,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41023 conditions, 11800 events. 7816/11800 cut-off events. For 22135/22465 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 71241 event pairs, 1666 based on Foata normal form. 244/11579 useless extension candidates. Maximal degree in co-relation 19090. Up to 2325 conditions per place. [2024-11-22 21:52:06,602 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 217 selfloop transitions, 33 changer transitions 0/260 dead transitions. [2024-11-22 21:52:06,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 260 transitions, 1811 flow [2024-11-22 21:52:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 21:52:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-22 21:52:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 419 transitions. [2024-11-22 21:52:06,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083820662768031 [2024-11-22 21:52:06,604 INFO L175 Difference]: Start difference. First operand has 97 places, 75 transitions, 475 flow. Second operand 18 states and 419 transitions. [2024-11-22 21:52:06,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 260 transitions, 1811 flow [2024-11-22 21:52:06,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 260 transitions, 1776 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:06,646 INFO L231 Difference]: Finished difference. Result has 110 places, 83 transitions, 595 flow [2024-11-22 21:52:06,647 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=595, PETRI_PLACES=110, PETRI_TRANSITIONS=83} [2024-11-22 21:52:06,647 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-11-22 21:52:06,648 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 83 transitions, 595 flow [2024-11-22 21:52:06,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.380952380952381) internal successors, (302), 21 states have internal predecessors, (302), 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) [2024-11-22 21:52:06,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:06,648 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:06,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:06,848 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,SelfDestructingSolverStorable16 [2024-11-22 21:52:06,850 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:06,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash 189562172, now seen corresponding path program 1 times [2024-11-22 21:52:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636201506] [2024-11-22 21:52:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:07,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636201506] [2024-11-22 21:52:07,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636201506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:07,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729329999] [2024-11-22 21:52:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:07,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:07,030 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) [2024-11-22 21:52:07,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:52:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:07,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:52:07,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:07,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:07,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729329999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:07,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:07,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:52:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112372378] [2024-11-22 21:52:07,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:07,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:52:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:52:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:52:07,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:52:07,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 83 transitions, 595 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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) [2024-11-22 21:52:07,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:07,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:52:07,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:07,993 INFO L124 PetriNetUnfolderBase]: 5570/8932 cut-off events. [2024-11-22 21:52:07,994 INFO L125 PetriNetUnfolderBase]: For 30331/30932 co-relation queries the response was YES. [2024-11-22 21:52:08,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33139 conditions, 8932 events. 5570/8932 cut-off events. For 30331/30932 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 52990 event pairs, 3067 based on Foata normal form. 238/8851 useless extension candidates. Maximal degree in co-relation 20918. Up to 4218 conditions per place. [2024-11-22 21:52:08,045 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 103 selfloop transitions, 24 changer transitions 0/139 dead transitions. [2024-11-22 21:52:08,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 139 transitions, 1144 flow [2024-11-22 21:52:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:52:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:52:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-11-22 21:52:08,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4614035087719298 [2024-11-22 21:52:08,047 INFO L175 Difference]: Start difference. First operand has 110 places, 83 transitions, 595 flow. Second operand 10 states and 263 transitions. [2024-11-22 21:52:08,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 139 transitions, 1144 flow [2024-11-22 21:52:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 139 transitions, 1014 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-11-22 21:52:08,062 INFO L231 Difference]: Finished difference. Result has 111 places, 86 transitions, 611 flow [2024-11-22 21:52:08,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=611, PETRI_PLACES=111, PETRI_TRANSITIONS=86} [2024-11-22 21:52:08,063 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-11-22 21:52:08,063 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 86 transitions, 611 flow [2024-11-22 21:52:08,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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) [2024-11-22 21:52:08,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:08,063 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:08,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:52:08,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:52:08,264 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:08,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:08,264 INFO L85 PathProgramCache]: Analyzing trace with hash -345548156, now seen corresponding path program 1 times [2024-11-22 21:52:08,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:08,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693169605] [2024-11-22 21:52:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:08,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:08,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:08,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693169605] [2024-11-22 21:52:08,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693169605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:08,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:08,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055660548] [2024-11-22 21:52:08,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:08,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:08,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:52:08,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 86 transitions, 611 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-11-22 21:52:08,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:08,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:52:08,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:08,956 INFO L124 PetriNetUnfolderBase]: 5712/9199 cut-off events. [2024-11-22 21:52:08,956 INFO L125 PetriNetUnfolderBase]: For 28558/29068 co-relation queries the response was YES. [2024-11-22 21:52:08,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33580 conditions, 9199 events. 5712/9199 cut-off events. For 28558/29068 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 55329 event pairs, 4258 based on Foata normal form. 49/8890 useless extension candidates. Maximal degree in co-relation 24191. Up to 7880 conditions per place. [2024-11-22 21:52:09,015 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 70 selfloop transitions, 2 changer transitions 17/101 dead transitions. [2024-11-22 21:52:09,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 101 transitions, 855 flow [2024-11-22 21:52:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-11-22 21:52:09,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47017543859649125 [2024-11-22 21:52:09,016 INFO L175 Difference]: Start difference. First operand has 111 places, 86 transitions, 611 flow. Second operand 5 states and 134 transitions. [2024-11-22 21:52:09,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 101 transitions, 855 flow [2024-11-22 21:52:09,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 101 transitions, 820 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:09,037 INFO L231 Difference]: Finished difference. Result has 110 places, 84 transitions, 564 flow [2024-11-22 21:52:09,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=564, PETRI_PLACES=110, PETRI_TRANSITIONS=84} [2024-11-22 21:52:09,037 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-11-22 21:52:09,037 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 84 transitions, 564 flow [2024-11-22 21:52:09,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-11-22 21:52:09,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:09,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:09,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:52:09,038 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:09,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash -993367350, now seen corresponding path program 1 times [2024-11-22 21:52:09,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:09,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574433301] [2024-11-22 21:52:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:09,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:09,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:09,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574433301] [2024-11-22 21:52:09,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574433301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:09,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:09,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:52:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990059816] [2024-11-22 21:52:09,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:09,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:09,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:09,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:09,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:09,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:52:09,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 84 transitions, 564 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-22 21:52:09,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:09,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:52:09,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:10,134 INFO L124 PetriNetUnfolderBase]: 8294/13075 cut-off events. [2024-11-22 21:52:10,134 INFO L125 PetriNetUnfolderBase]: For 39367/40150 co-relation queries the response was YES. [2024-11-22 21:52:10,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48038 conditions, 13075 events. 8294/13075 cut-off events. For 39367/40150 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 82363 event pairs, 2562 based on Foata normal form. 384/13134 useless extension candidates. Maximal degree in co-relation 47998. Up to 6165 conditions per place. [2024-11-22 21:52:10,246 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 161 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-11-22 21:52:10,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 190 transitions, 1640 flow [2024-11-22 21:52:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-11-22 21:52:10,247 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-22 21:52:10,247 INFO L175 Difference]: Start difference. First operand has 110 places, 84 transitions, 564 flow. Second operand 6 states and 186 transitions. [2024-11-22 21:52:10,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 190 transitions, 1640 flow [2024-11-22 21:52:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 190 transitions, 1630 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:10,281 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 755 flow [2024-11-22 21:52:10,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=755, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2024-11-22 21:52:10,282 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 55 predicate places. [2024-11-22 21:52:10,282 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 755 flow [2024-11-22 21:52:10,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-22 21:52:10,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:10,283 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:10,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:52:10,283 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:10,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 358408112, now seen corresponding path program 1 times [2024-11-22 21:52:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:10,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940801805] [2024-11-22 21:52:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:10,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940801805] [2024-11-22 21:52:10,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940801805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197165761] [2024-11-22 21:52:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:10,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:10,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:52:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:10,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:52:10,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:10,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:10,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197165761] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:10,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:10,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2024-11-22 21:52:10,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433784493] [2024-11-22 21:52:10,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:10,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:10,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:52:10,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:52:10,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 755 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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) [2024-11-22 21:52:10,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:10,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:52:10,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:11,408 INFO L124 PetriNetUnfolderBase]: 6485/10534 cut-off events. [2024-11-22 21:52:11,408 INFO L125 PetriNetUnfolderBase]: For 44187/44863 co-relation queries the response was YES. [2024-11-22 21:52:11,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41923 conditions, 10534 events. 6485/10534 cut-off events. For 44187/44863 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 69689 event pairs, 4649 based on Foata normal form. 72/10061 useless extension candidates. Maximal degree in co-relation 32321. Up to 9101 conditions per place. [2024-11-22 21:52:11,486 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 60 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-11-22 21:52:11,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 828 flow [2024-11-22 21:52:11,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-11-22 21:52:11,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4245614035087719 [2024-11-22 21:52:11,487 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 755 flow. Second operand 5 states and 121 transitions. [2024-11-22 21:52:11,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 828 flow [2024-11-22 21:52:11,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 90 transitions, 776 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:11,523 INFO L231 Difference]: Finished difference. Result has 108 places, 90 transitions, 656 flow [2024-11-22 21:52:11,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=656, PETRI_PLACES=108, PETRI_TRANSITIONS=90} [2024-11-22 21:52:11,523 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-11-22 21:52:11,523 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 90 transitions, 656 flow [2024-11-22 21:52:11,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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) [2024-11-22 21:52:11,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:11,524 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:11,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:52:11,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:52:11,725 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:11,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1981468316, now seen corresponding path program 2 times [2024-11-22 21:52:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202240571] [2024-11-22 21:52:11,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:11,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:11,739 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:52:11,739 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:11,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:11,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202240571] [2024-11-22 21:52:11,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202240571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:11,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:11,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:52:11,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519171770] [2024-11-22 21:52:11,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:11,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:11,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:11,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:52:11,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 90 transitions, 656 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-22 21:52:11,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:11,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:52:11,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:12,988 INFO L124 PetriNetUnfolderBase]: 11451/18047 cut-off events. [2024-11-22 21:52:12,989 INFO L125 PetriNetUnfolderBase]: For 47539/48064 co-relation queries the response was YES. [2024-11-22 21:52:13,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64283 conditions, 18047 events. 11451/18047 cut-off events. For 47539/48064 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 117522 event pairs, 4134 based on Foata normal form. 440/17909 useless extension candidates. Maximal degree in co-relation 50856. Up to 7021 conditions per place. [2024-11-22 21:52:13,144 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 172 selfloop transitions, 14 changer transitions 0/195 dead transitions. [2024-11-22 21:52:13,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 195 transitions, 1672 flow [2024-11-22 21:52:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-11-22 21:52:13,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5380116959064327 [2024-11-22 21:52:13,145 INFO L175 Difference]: Start difference. First operand has 108 places, 90 transitions, 656 flow. Second operand 6 states and 184 transitions. [2024-11-22 21:52:13,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 195 transitions, 1672 flow [2024-11-22 21:52:13,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 195 transitions, 1642 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:13,189 INFO L231 Difference]: Finished difference. Result has 113 places, 98 transitions, 790 flow [2024-11-22 21:52:13,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=790, PETRI_PLACES=113, PETRI_TRANSITIONS=98} [2024-11-22 21:52:13,190 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-11-22 21:52:13,190 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 98 transitions, 790 flow [2024-11-22 21:52:13,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-22 21:52:13,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:13,190 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:13,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-22 21:52:13,190 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:13,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1739689706, now seen corresponding path program 3 times [2024-11-22 21:52:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542224815] [2024-11-22 21:52:13,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:13,198 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:52:13,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:13,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:13,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542224815] [2024-11-22 21:52:13,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542224815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:13,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:13,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:52:13,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248765205] [2024-11-22 21:52:13,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:13,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:13,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:13,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-22 21:52:13,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 98 transitions, 790 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-22 21:52:13,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:13,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-22 21:52:13,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:14,366 INFO L124 PetriNetUnfolderBase]: 10888/17121 cut-off events. [2024-11-22 21:52:14,367 INFO L125 PetriNetUnfolderBase]: For 55395/56071 co-relation queries the response was YES. [2024-11-22 21:52:14,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61472 conditions, 17121 events. 10888/17121 cut-off events. For 55395/56071 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 106847 event pairs, 2209 based on Foata normal form. 384/17105 useless extension candidates. Maximal degree in co-relation 52308. Up to 6257 conditions per place. [2024-11-22 21:52:14,677 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 147 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-11-22 21:52:14,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 183 transitions, 1618 flow [2024-11-22 21:52:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-11-22 21:52:14,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-22 21:52:14,678 INFO L175 Difference]: Start difference. First operand has 113 places, 98 transitions, 790 flow. Second operand 6 states and 186 transitions. [2024-11-22 21:52:14,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 183 transitions, 1618 flow [2024-11-22 21:52:14,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 183 transitions, 1595 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-22 21:52:14,717 INFO L231 Difference]: Finished difference. Result has 119 places, 100 transitions, 886 flow [2024-11-22 21:52:14,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=886, PETRI_PLACES=119, PETRI_TRANSITIONS=100} [2024-11-22 21:52:14,718 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-11-22 21:52:14,718 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 100 transitions, 886 flow [2024-11-22 21:52:14,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-22 21:52:14,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:14,718 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:14,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-22 21:52:14,718 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:14,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1863225856, now seen corresponding path program 2 times [2024-11-22 21:52:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67620522] [2024-11-22 21:52:14,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:14,732 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:14,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:52:14,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67620522] [2024-11-22 21:52:14,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67620522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103579475] [2024-11-22 21:52:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:14,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:14,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:52:14,966 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:14,966 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:14,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 21:52:14,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:14,973 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 8 treesize of output 1 [2024-11-22 21:52:14,975 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 [2024-11-22 21:52:15,027 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:52:15,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-22 21:52:15,036 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:52:15,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:52:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:15,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:15,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103579475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:15,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:15,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-22 21:52:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610654682] [2024-11-22 21:52:15,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:15,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:52:15,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:52:15,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:52:15,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 57 [2024-11-22 21:52:15,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 100 transitions, 886 flow. Second operand has 21 states, 21 states have (on average 14.714285714285714) internal successors, (309), 21 states have internal predecessors, (309), 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) [2024-11-22 21:52:15,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:15,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 57 [2024-11-22 21:52:15,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:17,133 INFO L124 PetriNetUnfolderBase]: 9434/15060 cut-off events. [2024-11-22 21:52:17,133 INFO L125 PetriNetUnfolderBase]: For 54546/54949 co-relation queries the response was YES. [2024-11-22 21:52:17,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57882 conditions, 15060 events. 9434/15060 cut-off events. For 54546/54949 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 96075 event pairs, 1581 based on Foata normal form. 435/15052 useless extension candidates. Maximal degree in co-relation 47438. Up to 2953 conditions per place. [2024-11-22 21:52:17,257 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 195 selfloop transitions, 49 changer transitions 0/261 dead transitions. [2024-11-22 21:52:17,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 261 transitions, 2416 flow [2024-11-22 21:52:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 21:52:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-22 21:52:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 375 transitions. [2024-11-22 21:52:17,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3654970760233918 [2024-11-22 21:52:17,259 INFO L175 Difference]: Start difference. First operand has 119 places, 100 transitions, 886 flow. Second operand 18 states and 375 transitions. [2024-11-22 21:52:17,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 261 transitions, 2416 flow [2024-11-22 21:52:17,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 261 transitions, 2314 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:17,350 INFO L231 Difference]: Finished difference. Result has 133 places, 117 transitions, 1189 flow [2024-11-22 21:52:17,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1189, PETRI_PLACES=133, PETRI_TRANSITIONS=117} [2024-11-22 21:52:17,351 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-11-22 21:52:17,351 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 117 transitions, 1189 flow [2024-11-22 21:52:17,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.714285714285714) internal successors, (309), 21 states have internal predecessors, (309), 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) [2024-11-22 21:52:17,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:17,351 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:17,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:52:17,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-22 21:52:17,555 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:17,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1925426143, now seen corresponding path program 1 times [2024-11-22 21:52:17,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:17,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224579032] [2024-11-22 21:52:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:17,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224579032] [2024-11-22 21:52:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224579032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131815665] [2024-11-22 21:52:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:17,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:17,765 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:17,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:52:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:17,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:52:17,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:17,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:18,042 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 [2024-11-22 21:52:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:18,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131815665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:18,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:18,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-22 21:52:18,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721219309] [2024-11-22 21:52:18,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:18,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:52:18,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:18,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:52:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:52:18,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:52:18,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 117 transitions, 1189 flow. Second operand has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 states have internal predecessors, (426), 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) [2024-11-22 21:52:18,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:18,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:52:18,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:19,985 INFO L124 PetriNetUnfolderBase]: 8325/14077 cut-off events. [2024-11-22 21:52:19,985 INFO L125 PetriNetUnfolderBase]: For 57401/57899 co-relation queries the response was YES. [2024-11-22 21:52:20,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55537 conditions, 14077 events. 8325/14077 cut-off events. For 57401/57899 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 94579 event pairs, 3215 based on Foata normal form. 253/13885 useless extension candidates. Maximal degree in co-relation 45254. Up to 4598 conditions per place. [2024-11-22 21:52:20,126 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 158 selfloop transitions, 40 changer transitions 0/218 dead transitions. [2024-11-22 21:52:20,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 218 transitions, 2139 flow [2024-11-22 21:52:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:52:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:52:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 359 transitions. [2024-11-22 21:52:20,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.449874686716792 [2024-11-22 21:52:20,128 INFO L175 Difference]: Start difference. First operand has 133 places, 117 transitions, 1189 flow. Second operand 14 states and 359 transitions. [2024-11-22 21:52:20,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 218 transitions, 2139 flow [2024-11-22 21:52:20,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 218 transitions, 2103 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-22 21:52:20,227 INFO L231 Difference]: Finished difference. Result has 141 places, 119 transitions, 1283 flow [2024-11-22 21:52:20,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1283, PETRI_PLACES=141, PETRI_TRANSITIONS=119} [2024-11-22 21:52:20,228 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-11-22 21:52:20,228 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 119 transitions, 1283 flow [2024-11-22 21:52:20,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 states have internal predecessors, (426), 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) [2024-11-22 21:52:20,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:20,228 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:20,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:20,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-22 21:52:20,429 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:20,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1895355918, now seen corresponding path program 1 times [2024-11-22 21:52:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:20,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306118199] [2024-11-22 21:52:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:20,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:20,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306118199] [2024-11-22 21:52:20,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306118199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:20,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952723930] [2024-11-22 21:52:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:20,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:20,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:20,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:20,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:52:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:20,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:52:20,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:20,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:20,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952723930] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:20,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:20,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-22 21:52:20,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515390037] [2024-11-22 21:52:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:20,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:20,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:20,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:52:20,641 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:52:20,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 119 transitions, 1283 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:20,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:20,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:52:20,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:21,763 INFO L124 PetriNetUnfolderBase]: 9260/14484 cut-off events. [2024-11-22 21:52:21,764 INFO L125 PetriNetUnfolderBase]: For 83433/83729 co-relation queries the response was YES. [2024-11-22 21:52:21,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61974 conditions, 14484 events. 9260/14484 cut-off events. For 83433/83729 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 91399 event pairs, 2972 based on Foata normal form. 667/14350 useless extension candidates. Maximal degree in co-relation 51582. Up to 7678 conditions per place. [2024-11-22 21:52:21,857 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 148 selfloop transitions, 10 changer transitions 0/175 dead transitions. [2024-11-22 21:52:21,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 175 transitions, 2436 flow [2024-11-22 21:52:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-22 21:52:21,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2024-11-22 21:52:21,859 INFO L175 Difference]: Start difference. First operand has 141 places, 119 transitions, 1283 flow. Second operand 5 states and 132 transitions. [2024-11-22 21:52:21,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 175 transitions, 2436 flow [2024-11-22 21:52:21,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 175 transitions, 2352 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-22 21:52:21,946 INFO L231 Difference]: Finished difference. Result has 136 places, 117 transitions, 1246 flow [2024-11-22 21:52:21,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1246, PETRI_PLACES=136, PETRI_TRANSITIONS=117} [2024-11-22 21:52:21,947 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 79 predicate places. [2024-11-22 21:52:21,947 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 117 transitions, 1246 flow [2024-11-22 21:52:21,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:21,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:21,947 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:21,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 21:52:22,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:22,151 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:22,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash -445314138, now seen corresponding path program 1 times [2024-11-22 21:52:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:22,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154303634] [2024-11-22 21:52:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:22,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:22,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154303634] [2024-11-22 21:52:22,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154303634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:22,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865330861] [2024-11-22 21:52:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:22,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:22,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:22,267 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:22,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:52:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:22,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:52:22,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:22,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:22,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865330861] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:22,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:22,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-22 21:52:22,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039502464] [2024-11-22 21:52:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:22,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:22,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:22,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:52:22,416 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:52:22,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 117 transitions, 1246 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:22,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:22,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:52:22,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:23,393 INFO L124 PetriNetUnfolderBase]: 8378/14067 cut-off events. [2024-11-22 21:52:23,393 INFO L125 PetriNetUnfolderBase]: For 75545/75892 co-relation queries the response was YES. [2024-11-22 21:52:23,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55868 conditions, 14067 events. 8378/14067 cut-off events. For 75545/75892 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 93840 event pairs, 2485 based on Foata normal form. 356/13784 useless extension candidates. Maximal degree in co-relation 47167. Up to 7554 conditions per place. [2024-11-22 21:52:23,523 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 86 selfloop transitions, 24 changer transitions 0/128 dead transitions. [2024-11-22 21:52:23,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 128 transitions, 1362 flow [2024-11-22 21:52:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-22 21:52:23,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2024-11-22 21:52:23,524 INFO L175 Difference]: Start difference. First operand has 136 places, 117 transitions, 1246 flow. Second operand 5 states and 129 transitions. [2024-11-22 21:52:23,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 128 transitions, 1362 flow [2024-11-22 21:52:23,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 128 transitions, 1335 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:23,628 INFO L231 Difference]: Finished difference. Result has 137 places, 106 transitions, 1057 flow [2024-11-22 21:52:23,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1057, PETRI_PLACES=137, PETRI_TRANSITIONS=106} [2024-11-22 21:52:23,628 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-11-22 21:52:23,628 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 106 transitions, 1057 flow [2024-11-22 21:52:23,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:23,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:23,629 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:23,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:23,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-22 21:52:23,829 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:23,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash -802261541, now seen corresponding path program 2 times [2024-11-22 21:52:23,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:23,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282141031] [2024-11-22 21:52:23,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:23,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:23,843 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:52:23,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:52:23,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:23,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282141031] [2024-11-22 21:52:23,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282141031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:23,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66855808] [2024-11-22 21:52:23,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:23,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:23,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:23,964 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:23,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:52:24,038 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:52:24,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:24,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 21:52:24,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:24,084 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 8 treesize of output 1 [2024-11-22 21:52:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:52:24,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:52:24,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66855808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:24,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:24,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:52:24,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465163151] [2024-11-22 21:52:24,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:24,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:52:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:52:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:52:24,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:52:24,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 106 transitions, 1057 flow. Second operand has 17 states, 17 states have (on average 19.176470588235293) internal successors, (326), 17 states have internal predecessors, (326), 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) [2024-11-22 21:52:24,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:24,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:52:24,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:26,449 INFO L124 PetriNetUnfolderBase]: 7782/13141 cut-off events. [2024-11-22 21:52:26,449 INFO L125 PetriNetUnfolderBase]: For 79255/79580 co-relation queries the response was YES. [2024-11-22 21:52:26,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54265 conditions, 13141 events. 7782/13141 cut-off events. For 79255/79580 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 87142 event pairs, 2578 based on Foata normal form. 273/13007 useless extension candidates. Maximal degree in co-relation 45468. Up to 4748 conditions per place. [2024-11-22 21:52:26,582 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 108 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2024-11-22 21:52:26,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 151 transitions, 1603 flow [2024-11-22 21:52:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-11-22 21:52:26,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45321637426900585 [2024-11-22 21:52:26,584 INFO L175 Difference]: Start difference. First operand has 137 places, 106 transitions, 1057 flow. Second operand 6 states and 155 transitions. [2024-11-22 21:52:26,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 151 transitions, 1603 flow [2024-11-22 21:52:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 151 transitions, 1541 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-22 21:52:26,709 INFO L231 Difference]: Finished difference. Result has 136 places, 105 transitions, 1039 flow [2024-11-22 21:52:26,710 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1039, PETRI_PLACES=136, PETRI_TRANSITIONS=105} [2024-11-22 21:52:26,710 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 79 predicate places. [2024-11-22 21:52:26,710 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 105 transitions, 1039 flow [2024-11-22 21:52:26,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.176470588235293) internal successors, (326), 17 states have internal predecessors, (326), 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) [2024-11-22 21:52:26,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:26,711 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:26,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:26,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-22 21:52:26,916 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:26,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1572007364, now seen corresponding path program 1 times [2024-11-22 21:52:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:26,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456728803] [2024-11-22 21:52:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:26,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:52:27,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456728803] [2024-11-22 21:52:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456728803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473859051] [2024-11-22 21:52:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:27,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:27,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:27,042 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:27,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:52:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:27,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:52:27,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:52:27,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:27,346 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 29 treesize of output 25 [2024-11-22 21:52:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:52:27,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473859051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:27,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:27,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-22 21:52:27,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280537466] [2024-11-22 21:52:27,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:27,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:52:27,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:27,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:52:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:52:27,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-22 21:52:27,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 105 transitions, 1039 flow. Second operand has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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) [2024-11-22 21:52:27,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:27,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-22 21:52:27,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:30,328 INFO L124 PetriNetUnfolderBase]: 14998/25520 cut-off events. [2024-11-22 21:52:30,328 INFO L125 PetriNetUnfolderBase]: For 134476/135275 co-relation queries the response was YES. [2024-11-22 21:52:30,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101302 conditions, 25520 events. 14998/25520 cut-off events. For 134476/135275 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 187416 event pairs, 2346 based on Foata normal form. 120/24260 useless extension candidates. Maximal degree in co-relation 91829. Up to 3886 conditions per place. [2024-11-22 21:52:30,593 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 371 selfloop transitions, 70 changer transitions 0/463 dead transitions. [2024-11-22 21:52:30,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 463 transitions, 4410 flow [2024-11-22 21:52:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-22 21:52:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-22 21:52:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 667 transitions. [2024-11-22 21:52:30,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2024-11-22 21:52:30,594 INFO L175 Difference]: Start difference. First operand has 136 places, 105 transitions, 1039 flow. Second operand 23 states and 667 transitions. [2024-11-22 21:52:30,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 463 transitions, 4410 flow [2024-11-22 21:52:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 463 transitions, 4270 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:52:30,784 INFO L231 Difference]: Finished difference. Result has 171 places, 163 transitions, 1793 flow [2024-11-22 21:52:30,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1793, PETRI_PLACES=171, PETRI_TRANSITIONS=163} [2024-11-22 21:52:30,784 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 114 predicate places. [2024-11-22 21:52:30,784 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 163 transitions, 1793 flow [2024-11-22 21:52:30,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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) [2024-11-22 21:52:30,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:30,785 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:30,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-22 21:52:30,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-22 21:52:30,989 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:30,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2114069286, now seen corresponding path program 2 times [2024-11-22 21:52:30,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:30,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521122701] [2024-11-22 21:52:30,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:30,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:30,997 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:52:30,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 21:52:31,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:31,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521122701] [2024-11-22 21:52:31,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521122701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:31,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525003861] [2024-11-22 21:52:31,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:31,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:31,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:31,070 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:31,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:52:31,139 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:52:31,140 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:31,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:52:31,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 21:52:31,234 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:52:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525003861] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:31,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:52:31,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2024-11-22 21:52:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778079179] [2024-11-22 21:52:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:31,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:52:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:52:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:52:31,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-22 21:52:31,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 163 transitions, 1793 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 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) [2024-11-22 21:52:31,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:31,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-22 21:52:31,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:38,477 INFO L124 PetriNetUnfolderBase]: 35871/55298 cut-off events. [2024-11-22 21:52:38,478 INFO L125 PetriNetUnfolderBase]: For 490887/492374 co-relation queries the response was YES. [2024-11-22 21:52:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262793 conditions, 55298 events. 35871/55298 cut-off events. For 490887/492374 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 393039 event pairs, 7841 based on Foata normal form. 886/55562 useless extension candidates. Maximal degree in co-relation 251628. Up to 16278 conditions per place. [2024-11-22 21:52:39,450 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 280 selfloop transitions, 112 changer transitions 0/404 dead transitions. [2024-11-22 21:52:39,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 404 transitions, 4762 flow [2024-11-22 21:52:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:52:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:52:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-11-22 21:52:39,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4543859649122807 [2024-11-22 21:52:39,451 INFO L175 Difference]: Start difference. First operand has 171 places, 163 transitions, 1793 flow. Second operand 10 states and 259 transitions. [2024-11-22 21:52:39,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 404 transitions, 4762 flow [2024-11-22 21:52:40,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 404 transitions, 4641 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:40,750 INFO L231 Difference]: Finished difference. Result has 182 places, 226 transitions, 3016 flow [2024-11-22 21:52:40,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3016, PETRI_PLACES=182, PETRI_TRANSITIONS=226} [2024-11-22 21:52:40,751 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 125 predicate places. [2024-11-22 21:52:40,751 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 226 transitions, 3016 flow [2024-11-22 21:52:40,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 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) [2024-11-22 21:52:40,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:40,752 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:40,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:40,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:40,955 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:40,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2112281826, now seen corresponding path program 3 times [2024-11-22 21:52:40,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:40,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227602965] [2024-11-22 21:52:40,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:40,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:40,964 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:52:40,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 21:52:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227602965] [2024-11-22 21:52:41,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227602965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909405648] [2024-11-22 21:52:41,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:41,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:41,041 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:41,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 21:52:41,124 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:52:41,124 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:41,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:52:41,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 21:52:41,218 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:52:41,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909405648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:41,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:52:41,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2024-11-22 21:52:41,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972128056] [2024-11-22 21:52:41,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:41,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:52:41,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:52:41,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:52:41,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-22 21:52:41,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 226 transitions, 3016 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 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) [2024-11-22 21:52:41,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:41,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-22 21:52:41,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:51,802 INFO L124 PetriNetUnfolderBase]: 46268/70758 cut-off events. [2024-11-22 21:52:51,803 INFO L125 PetriNetUnfolderBase]: For 784674/786626 co-relation queries the response was YES. [2024-11-22 21:52:52,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356449 conditions, 70758 events. 46268/70758 cut-off events. For 784674/786626 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 514030 event pairs, 3500 based on Foata normal form. 1479/71546 useless extension candidates. Maximal degree in co-relation 344751. Up to 15158 conditions per place. [2024-11-22 21:52:52,913 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 269 selfloop transitions, 178 changer transitions 0/459 dead transitions. [2024-11-22 21:52:52,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 459 transitions, 6311 flow [2024-11-22 21:52:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:52:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:52:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 278 transitions. [2024-11-22 21:52:52,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4433811802232855 [2024-11-22 21:52:52,915 INFO L175 Difference]: Start difference. First operand has 182 places, 226 transitions, 3016 flow. Second operand 11 states and 278 transitions. [2024-11-22 21:52:52,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 459 transitions, 6311 flow [2024-11-22 21:52:55,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 459 transitions, 6234 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-11-22 21:52:55,978 INFO L231 Difference]: Finished difference. Result has 194 places, 304 transitions, 4900 flow [2024-11-22 21:52:55,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4900, PETRI_PLACES=194, PETRI_TRANSITIONS=304} [2024-11-22 21:52:55,979 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 137 predicate places. [2024-11-22 21:52:55,979 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 304 transitions, 4900 flow [2024-11-22 21:52:55,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 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) [2024-11-22 21:52:55,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:55,980 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:55,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:56,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:56,181 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-22 21:52:56,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash 401459512, now seen corresponding path program 1 times [2024-11-22 21:52:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:56,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057790755] [2024-11-22 21:52:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:56,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:56,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057790755] [2024-11-22 21:52:56,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057790755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:56,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104278146] [2024-11-22 21:52:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:56,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:56,328 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:56,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-22 21:52:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:56,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:52:56,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:56,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:56,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104278146] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:56,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:56,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-22 21:52:56,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357477421] [2024-11-22 21:52:56,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:56,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:56,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:56,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:52:56,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-22 21:52:56,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 304 transitions, 4900 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) [2024-11-22 21:52:56,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:56,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-22 21:52:56,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:06,504 INFO L124 PetriNetUnfolderBase]: 41726/68250 cut-off events. [2024-11-22 21:53:06,504 INFO L125 PetriNetUnfolderBase]: For 1000159/1003610 co-relation queries the response was YES. [2024-11-22 21:53:07,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370016 conditions, 68250 events. 41726/68250 cut-off events. For 1000159/1003610 co-relation queries the response was YES. Maximal size of possible extension queue 1686. Compared 549340 event pairs, 10432 based on Foata normal form. 596/65462 useless extension candidates. Maximal degree in co-relation 359236. Up to 36974 conditions per place. [2024-11-22 21:53:08,043 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 227 selfloop transitions, 70 changer transitions 40/365 dead transitions. [2024-11-22 21:53:08,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 365 transitions, 6566 flow [2024-11-22 21:53:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-11-22 21:53:08,045 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4456140350877193 [2024-11-22 21:53:08,045 INFO L175 Difference]: Start difference. First operand has 194 places, 304 transitions, 4900 flow. Second operand 5 states and 127 transitions. [2024-11-22 21:53:08,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 365 transitions, 6566 flow