./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-min-max-inc.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 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:52:15,516 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:52:15,569 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:52:15,573 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:52:15,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:52:15,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:52:15,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:52:15,593 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:52:15,594 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:52:15,597 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:52:15,597 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:52:15,597 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:52:15,598 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:52:15,598 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:52:15,598 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:52:15,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:52:15,598 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:52:15,598 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:52:15,599 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:52:15,599 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:52:15,599 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:52:15,601 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:52:15,601 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:52:15,601 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:52:15,601 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:52:15,601 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:52:15,601 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:52:15,602 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:52:15,602 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:52:15,602 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:52:15,602 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:52:15,602 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:52:15,603 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:52:15,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:52:15,603 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:52:15,603 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:52:15,603 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:52:15,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:52:15,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:52:15,604 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:52:15,604 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:52:15,604 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:52:15,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 [2024-11-09 10:52:15,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:52:15,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:52:15,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:52:15,835 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:52:15,835 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:52:15,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-11-09 10:52:17,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:52:17,175 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:52:17,176 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-11-09 10:52:17,183 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd5b6266/74c9b2ebe8d04516ba21b39b2edcf9ba/FLAGe53a7a93a [2024-11-09 10:52:17,195 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd5b6266/74c9b2ebe8d04516ba21b39b2edcf9ba [2024-11-09 10:52:17,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:52:17,197 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:52:17,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:52:17,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:52:17,202 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:52:17,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,203 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f216d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17, skipping insertion in model container [2024-11-09 10:52:17,203 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,221 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:52:17,361 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:52:17,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:52:17,369 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:52:17,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:52:17,400 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:52:17,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17 WrapperNode [2024-11-09 10:52:17,401 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:52:17,402 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:52:17,402 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:52:17,402 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:52:17,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,438 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 120 [2024-11-09 10:52:17,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:52:17,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:52:17,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:52:17,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:52:17,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,454 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,482 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:52:17,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,493 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,496 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,502 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,503 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,505 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:52:17,509 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:52:17,510 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:52:17,510 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:52:17,510 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (1/1) ... [2024-11-09 10:52:17,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:52:17,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:17,547 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) [2024-11-09 10:52:17,552 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 [2024-11-09 10:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:52:17,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:52:17,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:52:17,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:52:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-09 10:52:17,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-09 10:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:52:17,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:52:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:52:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:52:17,592 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:52:17,705 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:52:17,707 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:52:18,015 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:52:18,015 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:52:18,147 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:52:18,147 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:52:18,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:52:18 BoogieIcfgContainer [2024-11-09 10:52:18,148 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:52:18,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:52:18,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:52:18,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:52:18,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:52:17" (1/3) ... [2024-11-09 10:52:18,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f640e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:52:18, skipping insertion in model container [2024-11-09 10:52:18,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:17" (2/3) ... [2024-11-09 10:52:18,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f640e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:52:18, skipping insertion in model container [2024-11-09 10:52:18,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:52:18" (3/3) ... [2024-11-09 10:52:18,157 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2024-11-09 10:52:18,169 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:52:18,169 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-09 10:52:18,169 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:52:18,238 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:52:18,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 81 transitions, 190 flow [2024-11-09 10:52:18,300 INFO L124 PetriNetUnfolderBase]: 6/77 cut-off events. [2024-11-09 10:52:18,302 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:52:18,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 77 events. 6/77 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 221 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-11-09 10:52:18,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 81 transitions, 190 flow [2024-11-09 10:52:18,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 76 transitions, 176 flow [2024-11-09 10:52:18,317 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:52:18,322 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;@56418d26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:52:18,324 INFO L334 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-11-09 10:52:18,328 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:52:18,328 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-09 10:52:18,328 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:52:18,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:18,329 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:52:18,330 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:18,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:18,335 INFO L85 PathProgramCache]: Analyzing trace with hash 496606758, now seen corresponding path program 1 times [2024-11-09 10:52:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:18,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286719235] [2024-11-09 10:52:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:18,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:18,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:18,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286719235] [2024-11-09 10:52:18,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286719235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:18,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:18,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:52:18,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865039116] [2024-11-09 10:52:18,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:18,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:52:18,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:52:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:52:18,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-09 10:52:18,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-11-09 10:52:18,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:18,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-09 10:52:18,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:21,725 INFO L124 PetriNetUnfolderBase]: 32532/45884 cut-off events. [2024-11-09 10:52:21,725 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2024-11-09 10:52:21,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88242 conditions, 45884 events. 32532/45884 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341359 event pairs, 23751 based on Foata normal form. 1/30795 useless extension candidates. Maximal degree in co-relation 85331. Up to 39794 conditions per place. [2024-11-09 10:52:22,012 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 46 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-09 10:52:22,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 262 flow [2024-11-09 10:52:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:52:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:52:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-09 10:52:22,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5596707818930041 [2024-11-09 10:52:22,024 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 176 flow. Second operand 3 states and 136 transitions. [2024-11-09 10:52:22,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 262 flow [2024-11-09 10:52:22,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 246 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:52:22,061 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 154 flow [2024-11-09 10:52:22,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-11-09 10:52:22,067 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -11 predicate places. [2024-11-09 10:52:22,068 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 154 flow [2024-11-09 10:52:22,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-11-09 10:52:22,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:22,068 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:52:22,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:52:22,069 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:22,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash 496606759, now seen corresponding path program 1 times [2024-11-09 10:52:22,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:22,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276715347] [2024-11-09 10:52:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:22,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276715347] [2024-11-09 10:52:22,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276715347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:22,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:52:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942214673] [2024-11-09 10:52:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:22,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:52:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:52:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:52:22,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-09 10:52:22,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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) [2024-11-09 10:52:22,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:22,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-09 10:52:22,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:24,572 INFO L124 PetriNetUnfolderBase]: 32532/45886 cut-off events. [2024-11-09 10:52:24,572 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2024-11-09 10:52:24,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86802 conditions, 45886 events. 32532/45886 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341112 event pairs, 23751 based on Foata normal form. 1/30797 useless extension candidates. Maximal degree in co-relation 86779. Up to 39796 conditions per place. [2024-11-09 10:52:24,768 INFO L140 encePairwiseOnDemand]: 76/81 looper letters, 49 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2024-11-09 10:52:24,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 262 flow [2024-11-09 10:52:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:52:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:52:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-11-09 10:52:24,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-09 10:52:24,770 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 5 states and 189 transitions. [2024-11-09 10:52:24,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 262 flow [2024-11-09 10:52:24,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:24,773 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 166 flow [2024-11-09 10:52:24,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-09 10:52:24,774 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -8 predicate places. [2024-11-09 10:52:24,774 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 166 flow [2024-11-09 10:52:24,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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) [2024-11-09 10:52:24,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:24,774 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-09 10:52:24,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:52:24,775 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:24,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:24,775 INFO L85 PathProgramCache]: Analyzing trace with hash 497742279, now seen corresponding path program 1 times [2024-11-09 10:52:24,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:24,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731226132] [2024-11-09 10:52:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:24,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:24,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731226132] [2024-11-09 10:52:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731226132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067269482] [2024-11-09 10:52:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:24,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:24,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:24,969 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) [2024-11-09 10:52:24,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:52:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:25,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:52:25,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:25,086 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 [2024-11-09 10:52:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:25,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:25,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067269482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:25,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:25,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-09 10:52:25,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213461914] [2024-11-09 10:52:25,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:25,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:52:25,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:52:25,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:52:25,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-09 10:52:25,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 166 flow. Second operand has 15 states, 15 states have (on average 28.266666666666666) internal successors, (424), 15 states have internal predecessors, (424), 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) [2024-11-09 10:52:25,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:25,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-09 10:52:25,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:28,172 INFO L124 PetriNetUnfolderBase]: 32533/45888 cut-off events. [2024-11-09 10:52:28,172 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-11-09 10:52:28,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86813 conditions, 45888 events. 32533/45888 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341140 event pairs, 23751 based on Foata normal form. 0/30799 useless extension candidates. Maximal degree in co-relation 86795. Up to 39793 conditions per place. [2024-11-09 10:52:28,379 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 45 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-11-09 10:52:28,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 282 flow [2024-11-09 10:52:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:52:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:52:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 299 transitions. [2024-11-09 10:52:28,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4101508916323731 [2024-11-09 10:52:28,383 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 166 flow. Second operand 9 states and 299 transitions. [2024-11-09 10:52:28,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 282 flow [2024-11-09 10:52:28,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 75 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:28,385 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 191 flow [2024-11-09 10:52:28,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=191, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2024-11-09 10:52:28,386 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -3 predicate places. [2024-11-09 10:52:28,387 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 191 flow [2024-11-09 10:52:28,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 28.266666666666666) internal successors, (424), 15 states have internal predecessors, (424), 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) [2024-11-09 10:52:28,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:28,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:28,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:52:28,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:28,590 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:28,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1589070633, now seen corresponding path program 1 times [2024-11-09 10:52:28,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:28,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341786402] [2024-11-09 10:52:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:28,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:28,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341786402] [2024-11-09 10:52:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341786402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:28,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:28,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:52:28,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475121677] [2024-11-09 10:52:28,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:28,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:52:28,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:52:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:52:28,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-09 10:52:28,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2024-11-09 10:52:28,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:28,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-09 10:52:28,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:29,949 INFO L124 PetriNetUnfolderBase]: 16596/24017 cut-off events. [2024-11-09 10:52:29,949 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-09 10:52:29,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44851 conditions, 24017 events. 16596/24017 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 170570 event pairs, 11993 based on Foata normal form. 0/18586 useless extension candidates. Maximal degree in co-relation 44831. Up to 20220 conditions per place. [2024-11-09 10:52:30,047 INFO L140 encePairwiseOnDemand]: 73/81 looper letters, 44 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-11-09 10:52:30,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 273 flow [2024-11-09 10:52:30,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:52:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:52:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2024-11-09 10:52:30,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-11-09 10:52:30,049 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 191 flow. Second operand 4 states and 160 transitions. [2024-11-09 10:52:30,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 273 flow [2024-11-09 10:52:30,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 258 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-09 10:52:30,051 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 170 flow [2024-11-09 10:52:30,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-09 10:52:30,053 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -10 predicate places. [2024-11-09 10:52:30,053 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 170 flow [2024-11-09 10:52:30,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2024-11-09 10:52:30,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:30,053 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:30,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:52:30,053 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:30,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:30,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1589070634, now seen corresponding path program 1 times [2024-11-09 10:52:30,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:30,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547062741] [2024-11-09 10:52:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:30,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:30,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:30,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547062741] [2024-11-09 10:52:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547062741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:30,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669436775] [2024-11-09 10:52:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:30,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:30,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:30,191 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) [2024-11-09 10:52:30,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:52:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:30,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:52:30,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:30,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:30,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:52:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669436775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:30,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:30,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 10:52:30,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500016393] [2024-11-09 10:52:30,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:30,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:52:30,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:52:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:52:30,350 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-09 10:52:30,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 170 flow. Second operand has 8 states, 8 states have (on average 30.625) internal successors, (245), 8 states have internal predecessors, (245), 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) [2024-11-09 10:52:30,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:30,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-09 10:52:30,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:31,282 INFO L124 PetriNetUnfolderBase]: 13094/19015 cut-off events. [2024-11-09 10:52:31,283 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2024-11-09 10:52:31,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35307 conditions, 19015 events. 13094/19015 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 132205 event pairs, 9124 based on Foata normal form. 0/15340 useless extension candidates. Maximal degree in co-relation 35290. Up to 15819 conditions per place. [2024-11-09 10:52:31,352 INFO L140 encePairwiseOnDemand]: 76/81 looper letters, 41 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-09 10:52:31,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 256 flow [2024-11-09 10:52:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:52:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:52:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-11-09 10:52:31,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-09 10:52:31,353 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 170 flow. Second operand 5 states and 189 transitions. [2024-11-09 10:52:31,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 256 flow [2024-11-09 10:52:31,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:31,355 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 170 flow [2024-11-09 10:52:31,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-09 10:52:31,356 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -10 predicate places. [2024-11-09 10:52:31,356 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 170 flow [2024-11-09 10:52:31,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.625) internal successors, (245), 8 states have internal predecessors, (245), 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) [2024-11-09 10:52:31,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:31,356 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:31,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:52:31,560 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 [2024-11-09 10:52:31,561 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:31,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:31,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1026431102, now seen corresponding path program 1 times [2024-11-09 10:52:31,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:31,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698989502] [2024-11-09 10:52:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:31,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:31,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:31,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698989502] [2024-11-09 10:52:31,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698989502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:31,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415591526] [2024-11-09 10:52:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:31,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:31,702 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) [2024-11-09 10:52:31,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:52:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:31,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:52:31,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:31,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:31,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:52:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:31,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415591526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:31,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:31,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-09 10:52:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634149936] [2024-11-09 10:52:31,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:31,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:52:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:52:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:52:31,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-09 10:52:31,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 170 flow. Second operand has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 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) [2024-11-09 10:52:31,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:31,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-09 10:52:31,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:33,441 INFO L124 PetriNetUnfolderBase]: 18150/25635 cut-off events. [2024-11-09 10:52:33,441 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2024-11-09 10:52:33,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48289 conditions, 25635 events. 18150/25635 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 173150 event pairs, 4988 based on Foata normal form. 0/21708 useless extension candidates. Maximal degree in co-relation 48271. Up to 8507 conditions per place. [2024-11-09 10:52:33,546 INFO L140 encePairwiseOnDemand]: 72/81 looper letters, 78 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2024-11-09 10:52:33,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 434 flow [2024-11-09 10:52:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:52:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:52:33,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 290 transitions. [2024-11-09 10:52:33,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114638447971781 [2024-11-09 10:52:33,548 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 170 flow. Second operand 7 states and 290 transitions. [2024-11-09 10:52:33,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 434 flow [2024-11-09 10:52:33,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:52:33,550 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 202 flow [2024-11-09 10:52:33,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-11-09 10:52:33,550 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -6 predicate places. [2024-11-09 10:52:33,551 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 202 flow [2024-11-09 10:52:33,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 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) [2024-11-09 10:52:33,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:33,551 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:33,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:52:33,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:33,752 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:33,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1203647856, now seen corresponding path program 1 times [2024-11-09 10:52:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:33,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801623140] [2024-11-09 10:52:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801623140] [2024-11-09 10:52:33,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801623140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552473599] [2024-11-09 10:52:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:33,905 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) [2024-11-09 10:52:33,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:52:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:33,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 10:52:33,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:33,999 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:52:33,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552473599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:33,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:52:33,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-09 10:52:33,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473934028] [2024-11-09 10:52:33,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:34,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:52:34,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:52:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:52:34,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-09 10:52:34,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2024-11-09 10:52:34,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:34,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-09 10:52:34,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:35,893 INFO L124 PetriNetUnfolderBase]: 22097/35426 cut-off events. [2024-11-09 10:52:35,893 INFO L125 PetriNetUnfolderBase]: For 8698/8698 co-relation queries the response was YES. [2024-11-09 10:52:35,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69190 conditions, 35426 events. 22097/35426 cut-off events. For 8698/8698 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 275758 event pairs, 2687 based on Foata normal form. 0/31595 useless extension candidates. Maximal degree in co-relation 69170. Up to 17941 conditions per place. [2024-11-09 10:52:36,106 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 93 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-09 10:52:36,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 552 flow [2024-11-09 10:52:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:52:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:52:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-11-09 10:52:36,108 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6080246913580247 [2024-11-09 10:52:36,108 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 202 flow. Second operand 4 states and 197 transitions. [2024-11-09 10:52:36,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 552 flow [2024-11-09 10:52:36,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 546 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:52:36,114 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 229 flow [2024-11-09 10:52:36,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-11-09 10:52:36,115 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -4 predicate places. [2024-11-09 10:52:36,115 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 229 flow [2024-11-09 10:52:36,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2024-11-09 10:52:36,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:36,116 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:36,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:52:36,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:36,319 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:36,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:36,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1139311222, now seen corresponding path program 1 times [2024-11-09 10:52:36,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:36,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805246930] [2024-11-09 10:52:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:36,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:36,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:36,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805246930] [2024-11-09 10:52:36,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805246930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:36,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846577327] [2024-11-09 10:52:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:36,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:36,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:36,521 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) [2024-11-09 10:52:36,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:52:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:36,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 10:52:36,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:36,628 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:52:36,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846577327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:36,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:52:36,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-09 10:52:36,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554362851] [2024-11-09 10:52:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:36,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:52:36,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:36,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:52:36,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:52:36,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-09 10:52:36,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:36,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:36,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-09 10:52:36,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:39,357 INFO L124 PetriNetUnfolderBase]: 31336/48676 cut-off events. [2024-11-09 10:52:39,357 INFO L125 PetriNetUnfolderBase]: For 17743/19183 co-relation queries the response was YES. [2024-11-09 10:52:39,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104217 conditions, 48676 events. 31336/48676 cut-off events. For 17743/19183 co-relation queries the response was YES. Maximal size of possible extension queue 1577. Compared 376782 event pairs, 4070 based on Foata normal form. 1440/46107 useless extension candidates. Maximal degree in co-relation 104198. Up to 26029 conditions per place. [2024-11-09 10:52:39,649 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 96 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2024-11-09 10:52:39,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 597 flow [2024-11-09 10:52:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:52:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:52:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-09 10:52:39,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-11-09 10:52:39,651 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 229 flow. Second operand 4 states and 196 transitions. [2024-11-09 10:52:39,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 597 flow [2024-11-09 10:52:39,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:52:39,659 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 247 flow [2024-11-09 10:52:39,659 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-09 10:52:39,660 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -1 predicate places. [2024-11-09 10:52:39,660 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 247 flow [2024-11-09 10:52:39,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:39,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:39,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:39,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:52:39,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:39,861 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:39,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:39,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2018230301, now seen corresponding path program 1 times [2024-11-09 10:52:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885042563] [2024-11-09 10:52:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:39,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:39,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885042563] [2024-11-09 10:52:39,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885042563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:39,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091326948] [2024-11-09 10:52:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:39,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:39,951 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) [2024-11-09 10:52:39,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:52:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:40,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:52:40,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:40,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:40,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091326948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:40,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:40,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:52:40,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310791580] [2024-11-09 10:52:40,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:40,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:52:40,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:40,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:52:40,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:52:40,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-09 10:52:40,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 247 flow. Second operand has 14 states, 14 states have (on average 29.857142857142858) internal successors, (418), 14 states have internal predecessors, (418), 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) [2024-11-09 10:52:40,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:40,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-09 10:52:40,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:44,661 INFO L124 PetriNetUnfolderBase]: 50882/71306 cut-off events. [2024-11-09 10:52:44,661 INFO L125 PetriNetUnfolderBase]: For 29736/35855 co-relation queries the response was YES. [2024-11-09 10:52:44,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172623 conditions, 71306 events. 50882/71306 cut-off events. For 29736/35855 co-relation queries the response was YES. Maximal size of possible extension queue 2837. Compared 520226 event pairs, 27591 based on Foata normal form. 6797/75717 useless extension candidates. Maximal degree in co-relation 172601. Up to 39302 conditions per place. [2024-11-09 10:52:45,302 INFO L140 encePairwiseOnDemand]: 71/81 looper letters, 134 selfloop transitions, 12 changer transitions 0/166 dead transitions. [2024-11-09 10:52:45,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 166 transitions, 853 flow [2024-11-09 10:52:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:52:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:52:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 336 transitions. [2024-11-09 10:52:45,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-09 10:52:45,303 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 247 flow. Second operand 8 states and 336 transitions. [2024-11-09 10:52:45,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 166 transitions, 853 flow [2024-11-09 10:52:45,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 166 transitions, 828 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:45,328 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 307 flow [2024-11-09 10:52:45,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=307, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-11-09 10:52:45,328 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2024-11-09 10:52:45,328 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 307 flow [2024-11-09 10:52:45,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.857142857142858) internal successors, (418), 14 states have internal predecessors, (418), 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) [2024-11-09 10:52:45,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:45,329 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:45,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:52:45,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:45,532 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:45,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:45,533 INFO L85 PathProgramCache]: Analyzing trace with hash 803850553, now seen corresponding path program 1 times [2024-11-09 10:52:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:45,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973392526] [2024-11-09 10:52:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:45,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:45,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973392526] [2024-11-09 10:52:45,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973392526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:45,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188779777] [2024-11-09 10:52:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:45,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:45,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:45,606 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) [2024-11-09 10:52:45,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:52:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:45,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:52:45,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:45,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:45,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188779777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:45,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:45,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:52:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724903073] [2024-11-09 10:52:45,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:45,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:52:45,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:52:45,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:52:45,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 81 [2024-11-09 10:52:45,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 307 flow. Second operand has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 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) [2024-11-09 10:52:45,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:45,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 81 [2024-11-09 10:52:45,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:50,362 INFO L124 PetriNetUnfolderBase]: 50949/73683 cut-off events. [2024-11-09 10:52:50,363 INFO L125 PetriNetUnfolderBase]: For 58131/61739 co-relation queries the response was YES. [2024-11-09 10:52:50,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 conditions, 73683 events. 50949/73683 cut-off events. For 58131/61739 co-relation queries the response was YES. Maximal size of possible extension queue 2373. Compared 540604 event pairs, 31419 based on Foata normal form. 3590/73948 useless extension candidates. Maximal degree in co-relation 180122. Up to 43909 conditions per place. [2024-11-09 10:52:50,834 INFO L140 encePairwiseOnDemand]: 71/81 looper letters, 132 selfloop transitions, 12 changer transitions 0/163 dead transitions. [2024-11-09 10:52:50,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 163 transitions, 893 flow [2024-11-09 10:52:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:52:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:52:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 333 transitions. [2024-11-09 10:52:50,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-11-09 10:52:50,836 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 307 flow. Second operand 8 states and 333 transitions. [2024-11-09 10:52:50,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 163 transitions, 893 flow [2024-11-09 10:52:50,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 163 transitions, 874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-09 10:52:50,901 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 353 flow [2024-11-09 10:52:50,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=353, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2024-11-09 10:52:50,903 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 13 predicate places. [2024-11-09 10:52:50,903 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 353 flow [2024-11-09 10:52:50,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 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) [2024-11-09 10:52:50,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:50,903 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:50,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:52:51,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:51,104 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-09 10:52:51,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash -493175933, now seen corresponding path program 2 times [2024-11-09 10:52:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:51,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463772938] [2024-11-09 10:52:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:51,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463772938] [2024-11-09 10:52:51,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463772938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438605855] [2024-11-09 10:52:51,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:52:51,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:51,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:51,268 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) [2024-11-09 10:52:51,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:52:51,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:52:51,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:52:51,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:52:51,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:51,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:51,547 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 [2024-11-09 10:52:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438605855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:51,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:51,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-09 10:52:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32511746] [2024-11-09 10:52:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:51,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:52:51,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:52:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:52:51,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-09 10:52:51,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 353 flow. Second operand has 20 states, 20 states have (on average 31.6) internal successors, (632), 20 states have internal predecessors, (632), 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) [2024-11-09 10:52:51,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:51,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-09 10:52:51,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand