./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.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 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:43:05,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:43:05,114 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:43:05,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:43:05,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:43:05,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:43:05,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:43:05,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:43:05,158 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:43:05,160 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:43:05,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:43:05,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:43:05,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:43:05,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:43:05,163 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:43:05,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:43:05,164 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:43:05,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:43:05,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:43:05,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:43:05,165 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:43:05,167 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:43:05,168 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:43:05,168 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:43:05,168 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:43:05,168 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:43:05,169 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:43:05,169 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:43:05,169 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:43:05,169 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:43:05,169 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:43:05,170 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:43:05,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:43:05,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:43:05,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:43:05,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:43:05,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:43:05,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:43:05,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:43:05,173 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:43:05,173 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:43:05,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:43:05,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 [2024-11-20 17:43:05,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:43:05,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:43:05,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:43:05,431 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:43:05,431 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:43:05,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2024-11-20 17:43:06,892 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:43:07,079 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:43:07,080 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2024-11-20 17:43:07,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3baa85174/aaf66be675d84bf5b3e32412434e4ca1/FLAGd440d616c [2024-11-20 17:43:07,097 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3baa85174/aaf66be675d84bf5b3e32412434e4ca1 [2024-11-20 17:43:07,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:43:07,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:43:07,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:43:07,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:43:07,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:43:07,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d55d2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07, skipping insertion in model container [2024-11-20 17:43:07,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,135 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:43:07,365 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:43:07,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:43:07,387 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:43:07,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:43:07,446 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:43:07,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07 WrapperNode [2024-11-20 17:43:07,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:43:07,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:43:07,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:43:07,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:43:07,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,503 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 253 [2024-11-20 17:43:07,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:43:07,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:43:07,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:43:07,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:43:07,516 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,545 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 17:43:07,546 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,564 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,572 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:43:07,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:43:07,579 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:43:07,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:43:07,580 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (1/1) ... [2024-11-20 17:43:07,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:43:07,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:07,617 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) [2024-11-20 17:43:07,619 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 [2024-11-20 17:43:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:43:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:43:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:43:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:43:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:43:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:43:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:43:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:43:07,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:43:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:43:07,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:43:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-20 17:43:07,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-20 17:43:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:43:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:43:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:43:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:43:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:43:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:43:07,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:43:07,664 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:43:07,768 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:43:07,769 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:43:08,196 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:43:08,196 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:43:08,501 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:43:08,502 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:43:08,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:08 BoogieIcfgContainer [2024-11-20 17:43:08,502 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:43:08,505 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:43:08,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:43:08,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:43:08,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:43:07" (1/3) ... [2024-11-20 17:43:08,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72036fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:43:08, skipping insertion in model container [2024-11-20 17:43:08,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:07" (2/3) ... [2024-11-20 17:43:08,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72036fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:43:08, skipping insertion in model container [2024-11-20 17:43:08,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:08" (3/3) ... [2024-11-20 17:43:08,512 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2024-11-20 17:43:08,529 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:43:08,529 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-20 17:43:08,530 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:43:08,610 INFO L143 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2024-11-20 17:43:08,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 70 transitions, 180 flow [2024-11-20 17:43:08,719 INFO L124 PetriNetUnfolderBase]: 9/63 cut-off events. [2024-11-20 17:43:08,719 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 17:43:08,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 63 events. 9/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 138 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-11-20 17:43:08,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 70 transitions, 180 flow [2024-11-20 17:43:08,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 62 transitions, 154 flow [2024-11-20 17:43:08,738 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:43:08,744 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;@5dc6243f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:43:08,744 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-20 17:43:08,748 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:43:08,748 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:43:08,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:43:08,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:08,750 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:43:08,750 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:08,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash 795702, now seen corresponding path program 1 times [2024-11-20 17:43:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541885622] [2024-11-20 17:43:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541885622] [2024-11-20 17:43:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541885622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:09,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:43:09,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:43:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990248917] [2024-11-20 17:43:09,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:09,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:43:09,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:43:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:43:09,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-20 17:43:09,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-20 17:43:09,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:09,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-20 17:43:09,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:11,155 INFO L124 PetriNetUnfolderBase]: 14986/20198 cut-off events. [2024-11-20 17:43:11,156 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2024-11-20 17:43:11,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41822 conditions, 20198 events. 14986/20198 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 103935 event pairs, 13324 based on Foata normal form. 1/15693 useless extension candidates. Maximal degree in co-relation 41747. Up to 20169 conditions per place. [2024-11-20 17:43:11,324 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 49 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-11-20 17:43:11,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 244 flow [2024-11-20 17:43:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:43:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:43:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-20 17:43:11,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2024-11-20 17:43:11,338 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 154 flow. Second operand 3 states and 86 transitions. [2024-11-20 17:43:11,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 244 flow [2024-11-20 17:43:11,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-20 17:43:11,356 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 126 flow [2024-11-20 17:43:11,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-11-20 17:43:11,363 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-11-20 17:43:11,363 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 126 flow [2024-11-20 17:43:11,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-20 17:43:11,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:11,364 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:43:11,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:43:11,365 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:11,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 795703, now seen corresponding path program 1 times [2024-11-20 17:43:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:11,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338251012] [2024-11-20 17:43:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:11,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:11,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338251012] [2024-11-20 17:43:11,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338251012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:11,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:43:11,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:43:11,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400506787] [2024-11-20 17:43:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:11,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:43:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:11,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:43:11,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:43:11,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-20 17:43:11,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 17:43:11,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:11,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-20 17:43:11,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:13,335 INFO L124 PetriNetUnfolderBase]: 14987/20201 cut-off events. [2024-11-20 17:43:13,336 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-11-20 17:43:13,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40858 conditions, 20201 events. 14987/20201 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 103919 event pairs, 13324 based on Foata normal form. 0/15695 useless extension candidates. Maximal degree in co-relation 40836. Up to 20174 conditions per place. [2024-11-20 17:43:13,437 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 51 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-20 17:43:13,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 244 flow [2024-11-20 17:43:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:43:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:43:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-20 17:43:13,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-20 17:43:13,441 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 126 flow. Second operand 4 states and 96 transitions. [2024-11-20 17:43:13,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 244 flow [2024-11-20 17:43:13,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:43:13,444 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 149 flow [2024-11-20 17:43:13,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-11-20 17:43:13,445 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2024-11-20 17:43:13,445 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 149 flow [2024-11-20 17:43:13,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 17:43:13,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:13,446 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:43:13,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:43:13,447 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:13,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash 764695564, now seen corresponding path program 1 times [2024-11-20 17:43:13,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:13,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821356709] [2024-11-20 17:43:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821356709] [2024-11-20 17:43:13,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821356709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990085120] [2024-11-20 17:43:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:13,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:13,738 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) [2024-11-20 17:43:13,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:43:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:13,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:43:13,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:13,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:43:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:14,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:43:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:14,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990085120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:43:14,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:43:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:43:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731967437] [2024-11-20 17:43:14,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:43:14,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:43:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:43:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:43:14,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-20 17:43:14,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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) [2024-11-20 17:43:14,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:14,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-20 17:43:14,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:16,074 INFO L124 PetriNetUnfolderBase]: 14988/20203 cut-off events. [2024-11-20 17:43:16,074 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-11-20 17:43:16,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40874 conditions, 20203 events. 14988/20203 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 103898 event pairs, 13324 based on Foata normal form. 0/15696 useless extension candidates. Maximal degree in co-relation 40843. Up to 20171 conditions per place. [2024-11-20 17:43:16,202 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 47 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-20 17:43:16,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 271 flow [2024-11-20 17:43:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:43:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:43:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-11-20 17:43:16,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24131944444444445 [2024-11-20 17:43:16,205 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 149 flow. Second operand 8 states and 139 transitions. [2024-11-20 17:43:16,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 271 flow [2024-11-20 17:43:16,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 61 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:43:16,208 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 174 flow [2024-11-20 17:43:16,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-11-20 17:43:16,209 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-20 17:43:16,209 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 174 flow [2024-11-20 17:43:16,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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) [2024-11-20 17:43:16,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:16,210 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:16,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:43:16,410 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 [2024-11-20 17:43:16,411 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:16,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash 131630980, now seen corresponding path program 1 times [2024-11-20 17:43:16,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:16,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861465733] [2024-11-20 17:43:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:16,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:16,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:16,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861465733] [2024-11-20 17:43:16,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861465733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:16,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:43:16,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:43:16,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365432488] [2024-11-20 17:43:16,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:16,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:43:16,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:43:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:43:16,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-20 17:43:16,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-11-20 17:43:16,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:16,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-20 17:43:16,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:17,451 INFO L124 PetriNetUnfolderBase]: 11188/15110 cut-off events. [2024-11-20 17:43:17,452 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-11-20 17:43:17,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30613 conditions, 15110 events. 11188/15110 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 74399 event pairs, 9814 based on Foata normal form. 0/12560 useless extension candidates. Maximal degree in co-relation 30575. Up to 15077 conditions per place. [2024-11-20 17:43:17,527 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 50 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-20 17:43:17,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 276 flow [2024-11-20 17:43:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:43:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:43:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-20 17:43:17,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2024-11-20 17:43:17,529 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 174 flow. Second operand 4 states and 91 transitions. [2024-11-20 17:43:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 276 flow [2024-11-20 17:43:17,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 234 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-20 17:43:17,532 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 134 flow [2024-11-20 17:43:17,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-11-20 17:43:17,533 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2024-11-20 17:43:17,533 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 134 flow [2024-11-20 17:43:17,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-11-20 17:43:17,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:17,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:17,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:43:17,534 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:17,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash 131630981, now seen corresponding path program 1 times [2024-11-20 17:43:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184751793] [2024-11-20 17:43:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:17,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:17,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184751793] [2024-11-20 17:43:17,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184751793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:17,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:43:17,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:43:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412384517] [2024-11-20 17:43:17,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:17,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:43:17,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:43:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:43:17,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:17,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:43:17,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:17,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:17,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:19,267 INFO L124 PetriNetUnfolderBase]: 19694/26750 cut-off events. [2024-11-20 17:43:19,268 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2024-11-20 17:43:19,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54203 conditions, 26750 events. 19694/26750 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 147011 event pairs, 11285 based on Foata normal form. 391/22816 useless extension candidates. Maximal degree in co-relation 30487. Up to 15038 conditions per place. [2024-11-20 17:43:19,377 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 121 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2024-11-20 17:43:19,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 129 transitions, 543 flow [2024-11-20 17:43:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:43:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:43:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-11-20 17:43:19,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-11-20 17:43:19,379 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 134 flow. Second operand 5 states and 179 transitions. [2024-11-20 17:43:19,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 129 transitions, 543 flow [2024-11-20 17:43:19,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 129 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:43:19,382 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 148 flow [2024-11-20 17:43:19,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-11-20 17:43:19,383 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2024-11-20 17:43:19,383 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 148 flow [2024-11-20 17:43:19,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:43:19,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:19,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:19,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:43:19,384 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:19,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:19,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1110882817, now seen corresponding path program 1 times [2024-11-20 17:43:19,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:19,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811615327] [2024-11-20 17:43:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:19,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:19,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:19,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811615327] [2024-11-20 17:43:19,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811615327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:19,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:43:19,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:43:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55237731] [2024-11-20 17:43:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:19,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:43:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:43:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:43:19,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:19,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2024-11-20 17:43:19,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:19,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:19,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:20,646 INFO L124 PetriNetUnfolderBase]: 14906/20425 cut-off events. [2024-11-20 17:43:20,646 INFO L125 PetriNetUnfolderBase]: For 1503/1503 co-relation queries the response was YES. [2024-11-20 17:43:20,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42939 conditions, 20425 events. 14906/20425 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 108446 event pairs, 11441 based on Foata normal form. 432/17570 useless extension candidates. Maximal degree in co-relation 31748. Up to 15082 conditions per place. [2024-11-20 17:43:20,762 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 90 selfloop transitions, 4 changer transitions 4/102 dead transitions. [2024-11-20 17:43:20,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 445 flow [2024-11-20 17:43:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:43:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:43:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-20 17:43:20,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-11-20 17:43:20,764 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 148 flow. Second operand 5 states and 154 transitions. [2024-11-20 17:43:20,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 445 flow [2024-11-20 17:43:20,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:43:20,770 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 166 flow [2024-11-20 17:43:20,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-11-20 17:43:20,771 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-20 17:43:20,771 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 166 flow [2024-11-20 17:43:20,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2024-11-20 17:43:20,771 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:20,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:20,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:43:20,772 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:20,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:20,773 INFO L85 PathProgramCache]: Analyzing trace with hash -689451504, now seen corresponding path program 1 times [2024-11-20 17:43:20,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:20,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395051179] [2024-11-20 17:43:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:20,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:20,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395051179] [2024-11-20 17:43:20,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395051179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:20,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420633062] [2024-11-20 17:43:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:20,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:20,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:20,884 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) [2024-11-20 17:43:20,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:43:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:20,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 17:43:20,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:21,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:43:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:21,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420633062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:43:21,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:43:21,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-20 17:43:21,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534581107] [2024-11-20 17:43:21,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:43:21,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:43:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:43:21,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:43:21,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:21,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 166 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:43:21,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:21,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:21,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:23,015 INFO L124 PetriNetUnfolderBase]: 23412/32029 cut-off events. [2024-11-20 17:43:23,016 INFO L125 PetriNetUnfolderBase]: For 3097/3097 co-relation queries the response was YES. [2024-11-20 17:43:23,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69768 conditions, 32029 events. 23412/32029 cut-off events. For 3097/3097 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 184147 event pairs, 9882 based on Foata normal form. 391/27350 useless extension candidates. Maximal degree in co-relation 58577. Up to 13384 conditions per place. [2024-11-20 17:43:23,156 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 148 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2024-11-20 17:43:23,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 162 transitions, 746 flow [2024-11-20 17:43:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:43:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:43:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-11-20 17:43:23,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4253472222222222 [2024-11-20 17:43:23,158 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 166 flow. Second operand 8 states and 245 transitions. [2024-11-20 17:43:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 162 transitions, 746 flow [2024-11-20 17:43:23,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 162 transitions, 741 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:43:23,171 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 206 flow [2024-11-20 17:43:23,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2024-11-20 17:43:23,172 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2024-11-20 17:43:23,172 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 206 flow [2024-11-20 17:43:23,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:43:23,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:23,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:23,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:43:23,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-20 17:43:23,377 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:23,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash -794636076, now seen corresponding path program 1 times [2024-11-20 17:43:23,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:23,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084479453] [2024-11-20 17:43:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:23,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:23,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:23,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084479453] [2024-11-20 17:43:23,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084479453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:23,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773088541] [2024-11-20 17:43:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:23,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:23,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:23,480 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) [2024-11-20 17:43:23,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:43:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:23,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 17:43:23,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:23,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:43:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:23,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773088541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:43:23,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:43:23,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-20 17:43:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079716905] [2024-11-20 17:43:23,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:43:23,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:43:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:43:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:43:23,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:23,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 206 flow. Second operand has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 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) [2024-11-20 17:43:23,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:23,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:23,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:25,510 INFO L124 PetriNetUnfolderBase]: 18228/25344 cut-off events. [2024-11-20 17:43:25,511 INFO L125 PetriNetUnfolderBase]: For 6833/6833 co-relation queries the response was YES. [2024-11-20 17:43:25,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57483 conditions, 25344 events. 18228/25344 cut-off events. For 6833/6833 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 142273 event pairs, 9011 based on Foata normal form. 612/22104 useless extension candidates. Maximal degree in co-relation 39430. Up to 10410 conditions per place. [2024-11-20 17:43:25,603 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 111 selfloop transitions, 11 changer transitions 4/130 dead transitions. [2024-11-20 17:43:25,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 640 flow [2024-11-20 17:43:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:43:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:43:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-11-20 17:43:25,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-11-20 17:43:25,605 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 206 flow. Second operand 8 states and 219 transitions. [2024-11-20 17:43:25,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 640 flow [2024-11-20 17:43:25,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 130 transitions, 618 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-20 17:43:25,614 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 257 flow [2024-11-20 17:43:25,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2024-11-20 17:43:25,615 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2024-11-20 17:43:25,615 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 257 flow [2024-11-20 17:43:25,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 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) [2024-11-20 17:43:25,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:25,616 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:25,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:43:25,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:25,820 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:25,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash 524262875, now seen corresponding path program 2 times [2024-11-20 17:43:25,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:25,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337098878] [2024-11-20 17:43:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:25,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:25,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:25,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337098878] [2024-11-20 17:43:25,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337098878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:25,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110944714] [2024-11-20 17:43:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:43:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:25,987 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) [2024-11-20 17:43:25,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:43:26,066 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:43:26,066 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:43:26,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 17:43:26,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:26,085 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 12 treesize of output 11 [2024-11-20 17:43:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:43:26,296 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:43:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110944714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:26,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:43:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2024-11-20 17:43:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573855528] [2024-11-20 17:43:26,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:26,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:43:26,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:43:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:43:26,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:26,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2024-11-20 17:43:26,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:26,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:26,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:28,468 INFO L124 PetriNetUnfolderBase]: 24944/34337 cut-off events. [2024-11-20 17:43:28,468 INFO L125 PetriNetUnfolderBase]: For 12294/12294 co-relation queries the response was YES. [2024-11-20 17:43:28,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83451 conditions, 34337 events. 24944/34337 cut-off events. For 12294/12294 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 197248 event pairs, 10774 based on Foata normal form. 0/29146 useless extension candidates. Maximal degree in co-relation 61669. Up to 17334 conditions per place. [2024-11-20 17:43:28,671 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 95 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2024-11-20 17:43:28,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 614 flow [2024-11-20 17:43:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:43:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:43:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-11-20 17:43:28,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-11-20 17:43:28,673 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 257 flow. Second operand 5 states and 142 transitions. [2024-11-20 17:43:28,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 614 flow [2024-11-20 17:43:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 584 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-20 17:43:28,691 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 266 flow [2024-11-20 17:43:28,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2024-11-20 17:43:28,693 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2024-11-20 17:43:28,694 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 266 flow [2024-11-20 17:43:28,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2024-11-20 17:43:28,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:28,695 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:28,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:43:28,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:28,896 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:28,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1824195991, now seen corresponding path program 2 times [2024-11-20 17:43:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:28,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168916474] [2024-11-20 17:43:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:29,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168916474] [2024-11-20 17:43:29,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168916474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592414796] [2024-11-20 17:43:29,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:43:29,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:29,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:29,145 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) [2024-11-20 17:43:29,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:43:29,220 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:43:29,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:43:29,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:43:29,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:29,255 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 [2024-11-20 17:43:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:43:29,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:43:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592414796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:29,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:43:29,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2024-11-20 17:43:29,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368685700] [2024-11-20 17:43:29,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:29,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:43:29,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:43:29,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:43:29,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:29,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-20 17:43:29,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:29,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:29,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:31,378 INFO L124 PetriNetUnfolderBase]: 21460/29740 cut-off events. [2024-11-20 17:43:31,378 INFO L125 PetriNetUnfolderBase]: For 13861/13861 co-relation queries the response was YES. [2024-11-20 17:43:31,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70964 conditions, 29740 events. 21460/29740 cut-off events. For 13861/13861 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 166511 event pairs, 8497 based on Foata normal form. 0/25887 useless extension candidates. Maximal degree in co-relation 48723. Up to 29283 conditions per place. [2024-11-20 17:43:31,501 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 69 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-11-20 17:43:31,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 481 flow [2024-11-20 17:43:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:43:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:43:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-11-20 17:43:31,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3194444444444444 [2024-11-20 17:43:31,502 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 266 flow. Second operand 5 states and 115 transitions. [2024-11-20 17:43:31,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 481 flow [2024-11-20 17:43:31,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 457 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-20 17:43:31,512 INFO L231 Difference]: Finished difference. Result has 81 places, 64 transitions, 252 flow [2024-11-20 17:43:31,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=81, PETRI_TRANSITIONS=64} [2024-11-20 17:43:31,513 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2024-11-20 17:43:31,513 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 64 transitions, 252 flow [2024-11-20 17:43:31,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-20 17:43:31,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:31,513 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:31,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 17:43:31,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-20 17:43:31,718 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:31,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash 433292599, now seen corresponding path program 1 times [2024-11-20 17:43:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:31,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370624078] [2024-11-20 17:43:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:31,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:31,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370624078] [2024-11-20 17:43:31,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370624078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202624990] [2024-11-20 17:43:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:31,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:31,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:31,867 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) [2024-11-20 17:43:31,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:43:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:31,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:43:31,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:32,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:43:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202624990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:43:32,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:43:32,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-20 17:43:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20359706] [2024-11-20 17:43:32,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:43:32,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 17:43:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 17:43:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:43:32,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:32,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 64 transitions, 252 flow. Second operand has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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) [2024-11-20 17:43:32,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:32,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:32,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:35,510 INFO L124 PetriNetUnfolderBase]: 34772/47747 cut-off events. [2024-11-20 17:43:35,510 INFO L125 PetriNetUnfolderBase]: For 17942/17942 co-relation queries the response was YES. [2024-11-20 17:43:35,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112667 conditions, 47747 events. 34772/47747 cut-off events. For 17942/17942 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 283351 event pairs, 11651 based on Foata normal form. 317/42277 useless extension candidates. Maximal degree in co-relation 90469. Up to 14395 conditions per place. [2024-11-20 17:43:35,737 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 220 selfloop transitions, 16 changer transitions 1/241 dead transitions. [2024-11-20 17:43:35,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 241 transitions, 1298 flow [2024-11-20 17:43:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:43:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:43:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 338 transitions. [2024-11-20 17:43:35,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-11-20 17:43:35,739 INFO L175 Difference]: Start difference. First operand has 81 places, 64 transitions, 252 flow. Second operand 11 states and 338 transitions. [2024-11-20 17:43:35,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 241 transitions, 1298 flow [2024-11-20 17:43:35,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 241 transitions, 1276 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:43:35,760 INFO L231 Difference]: Finished difference. Result has 93 places, 71 transitions, 345 flow [2024-11-20 17:43:35,760 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=345, PETRI_PLACES=93, PETRI_TRANSITIONS=71} [2024-11-20 17:43:35,761 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 27 predicate places. [2024-11-20 17:43:35,761 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 71 transitions, 345 flow [2024-11-20 17:43:35,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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) [2024-11-20 17:43:35,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:35,761 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:35,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 17:43:35,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:35,962 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:35,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:35,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1587212094, now seen corresponding path program 2 times [2024-11-20 17:43:35,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:35,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148476489] [2024-11-20 17:43:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:35,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:36,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:36,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148476489] [2024-11-20 17:43:36,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148476489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:36,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435571169] [2024-11-20 17:43:36,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:43:36,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:36,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:36,495 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) [2024-11-20 17:43:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:43:36,579 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:43:36,579 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:43:36,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:43:36,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:36,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:43:36,816 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 [2024-11-20 17:43:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435571169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:43:36,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:43:36,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-20 17:43:36,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740456783] [2024-11-20 17:43:36,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:43:36,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:43:36,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:43:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:43:36,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:36,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 71 transitions, 345 flow. Second operand has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 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) [2024-11-20 17:43:36,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:36,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:36,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:41,053 INFO L124 PetriNetUnfolderBase]: 41083/56300 cut-off events. [2024-11-20 17:43:41,053 INFO L125 PetriNetUnfolderBase]: For 33538/33538 co-relation queries the response was YES. [2024-11-20 17:43:41,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139641 conditions, 56300 events. 41083/56300 cut-off events. For 33538/33538 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 329613 event pairs, 26350 based on Foata normal form. 0/49556 useless extension candidates. Maximal degree in co-relation 115875. Up to 28255 conditions per place. [2024-11-20 17:43:41,319 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 172 selfloop transitions, 11 changer transitions 0/187 dead transitions. [2024-11-20 17:43:41,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 187 transitions, 1054 flow [2024-11-20 17:43:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:43:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:43:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-11-20 17:43:41,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41512345679012347 [2024-11-20 17:43:41,321 INFO L175 Difference]: Start difference. First operand has 93 places, 71 transitions, 345 flow. Second operand 9 states and 269 transitions. [2024-11-20 17:43:41,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 187 transitions, 1054 flow [2024-11-20 17:43:41,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 187 transitions, 1046 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-20 17:43:41,370 INFO L231 Difference]: Finished difference. Result has 100 places, 72 transitions, 371 flow [2024-11-20 17:43:41,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=371, PETRI_PLACES=100, PETRI_TRANSITIONS=72} [2024-11-20 17:43:41,370 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2024-11-20 17:43:41,371 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 72 transitions, 371 flow [2024-11-20 17:43:41,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 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) [2024-11-20 17:43:41,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:41,371 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:41,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:43:41,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:41,572 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:41,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1420242078, now seen corresponding path program 3 times [2024-11-20 17:43:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:41,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320897591] [2024-11-20 17:43:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:41,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320897591] [2024-11-20 17:43:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320897591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:43:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775950701] [2024-11-20 17:43:41,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:43:41,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:43:41,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:43:41,744 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) [2024-11-20 17:43:41,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:43:41,822 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:43:41,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:43:41,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:43:41,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:43:41,837 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 12 treesize of output 11 [2024-11-20 17:43:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:43:42,132 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:43:42,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775950701] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:42,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:43:42,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2024-11-20 17:43:42,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510513685] [2024-11-20 17:43:42,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:42,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:43:42,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:43:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:43:42,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:42,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 72 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-20 17:43:42,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:42,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:42,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:43:45,871 INFO L124 PetriNetUnfolderBase]: 40287/55166 cut-off events. [2024-11-20 17:43:45,872 INFO L125 PetriNetUnfolderBase]: For 35574/35574 co-relation queries the response was YES. [2024-11-20 17:43:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137866 conditions, 55166 events. 40287/55166 cut-off events. For 35574/35574 co-relation queries the response was YES. Maximal size of possible extension queue 1181. Compared 332658 event pairs, 3776 based on Foata normal form. 0/48833 useless extension candidates. Maximal degree in co-relation 114117. Up to 49039 conditions per place. [2024-11-20 17:43:46,154 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 90 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2024-11-20 17:43:46,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 103 transitions, 670 flow [2024-11-20 17:43:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:43:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:43:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-20 17:43:46,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-11-20 17:43:46,155 INFO L175 Difference]: Start difference. First operand has 100 places, 72 transitions, 371 flow. Second operand 5 states and 129 transitions. [2024-11-20 17:43:46,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 103 transitions, 670 flow [2024-11-20 17:43:46,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 103 transitions, 624 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 17:43:46,395 INFO L231 Difference]: Finished difference. Result has 95 places, 71 transitions, 335 flow [2024-11-20 17:43:46,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=95, PETRI_TRANSITIONS=71} [2024-11-20 17:43:46,396 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 29 predicate places. [2024-11-20 17:43:46,396 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 71 transitions, 335 flow [2024-11-20 17:43:46,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-20 17:43:46,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:43:46,396 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:43:46,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:43:46,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 17:43:46,599 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:43:46,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:43:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1160815544, now seen corresponding path program 1 times [2024-11-20 17:43:46,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:43:46,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075970265] [2024-11-20 17:43:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:43:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:43:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:43:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:43:46,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:43:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075970265] [2024-11-20 17:43:46,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075970265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:43:46,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:43:46,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:43:46,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584259883] [2024-11-20 17:43:46,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:43:46,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:43:46,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:43:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:43:46,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:43:46,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-20 17:43:46,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 71 transitions, 335 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-11-20 17:43:46,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:43:46,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-20 17:43:46,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand