./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:52:30,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:52:30,720 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:52:30,725 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:52:30,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:52:30,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:52:30,761 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:52:30,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:52:30,762 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:52:30,762 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:52:30,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:52:30,763 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:52:30,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:52:30,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:52:30,764 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:52:30,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:52:30,765 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:52:30,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:52:30,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:52:30,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:52:30,766 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:52:30,768 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:52:30,771 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:52:30,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:52:30,771 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:52:30,772 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:52:30,772 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:52:30,772 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:52:30,772 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:52:30,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:52:30,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:52:30,773 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:52:30,773 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:52:30,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:52:30,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:52:30,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:52:30,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:52:30,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:52:30,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:52:30,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:52:30,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:52:30,776 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:52:30,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 [2024-11-09 10:52:31,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:52:31,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:52:31,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:52:31,090 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:52:31,091 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:52:31,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-09 10:52:32,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:52:32,691 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:52:32,692 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-09 10:52:32,701 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4f827e9/bcda3c63394747058b77b42d2e27e79d/FLAG761b4f00b [2024-11-09 10:52:32,720 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4f827e9/bcda3c63394747058b77b42d2e27e79d [2024-11-09 10:52:32,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:52:32,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:52:32,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:52:32,730 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:52:32,735 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:52:32,736 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:52:32" (1/1) ... [2024-11-09 10:52:32,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e6991e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:32, skipping insertion in model container [2024-11-09 10:52:32,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:52:32" (1/1) ... [2024-11-09 10:52:32,766 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:52:33,021 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:52:33,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:52:33,048 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:52:33,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:52:33,105 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:52:33,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33 WrapperNode [2024-11-09 10:52:33,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:52:33,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:52:33,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:52:33,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:52:33,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,127 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,157 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 266 [2024-11-09 10:52:33,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:52:33,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:52:33,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:52:33,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:52:33,175 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,182 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,199 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:52:33,200 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,221 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:52:33,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:52:33,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:52:33,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:52:33,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (1/1) ... [2024-11-09 10:52:33,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:52:33,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:33,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:52:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:52:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:52:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:52:33,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:52:33,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:52:33,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:52:33,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:52:33,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:52:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:52:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:52:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:52:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:52:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:52:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:52:33,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:52:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:52:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:52:33,316 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:52:33,428 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:52:33,430 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:52:33,923 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:52:33,923 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:52:34,344 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:52:34,345 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-09 10:52:34,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:52:34 BoogieIcfgContainer [2024-11-09 10:52:34,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:52:34,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:52:34,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:52:34,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:52:34,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:52:32" (1/3) ... [2024-11-09 10:52:34,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcc7bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:52:34, skipping insertion in model container [2024-11-09 10:52:34,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:52:33" (2/3) ... [2024-11-09 10:52:34,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcc7bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:52:34, skipping insertion in model container [2024-11-09 10:52:34,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:52:34" (3/3) ... [2024-11-09 10:52:34,353 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2024-11-09 10:52:34,371 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:52:34,371 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-09 10:52:34,372 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:52:34,443 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:52:34,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 59 transitions, 139 flow [2024-11-09 10:52:34,515 INFO L124 PetriNetUnfolderBase]: 5/56 cut-off events. [2024-11-09 10:52:34,516 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:52:34,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 5/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-11-09 10:52:34,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 59 transitions, 139 flow [2024-11-09 10:52:34,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 55 transitions, 128 flow [2024-11-09 10:52:34,534 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:52:34,541 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;@7c734102, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:52:34,541 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-09 10:52:34,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:52:34,544 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:52:34,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:52:34,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:34,545 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:52:34,546 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:34,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:34,551 INFO L85 PathProgramCache]: Analyzing trace with hash 894442, now seen corresponding path program 1 times [2024-11-09 10:52:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:34,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126500657] [2024-11-09 10:52:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:34,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:34,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126500657] [2024-11-09 10:52:34,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126500657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:34,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:34,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:52:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75391412] [2024-11-09 10:52:34,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:34,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:52:34,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:52:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:52:34,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-09 10:52:34,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:34,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:34,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-09 10:52:34,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:35,219 INFO L124 PetriNetUnfolderBase]: 333/711 cut-off events. [2024-11-09 10:52:35,219 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-09 10:52:35,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 711 events. 333/711 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3933 event pairs, 226 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 1092. Up to 481 conditions per place. [2024-11-09 10:52:35,232 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 26 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-09 10:52:35,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 176 flow [2024-11-09 10:52:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:52:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:52:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-09 10:52:35,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2024-11-09 10:52:35,248 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2024-11-09 10:52:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 176 flow [2024-11-09 10:52:35,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:52:35,258 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 112 flow [2024-11-09 10:52:35,262 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-11-09 10:52:35,267 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-09 10:52:35,267 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 112 flow [2024-11-09 10:52:35,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:35,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:35,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:52:35,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:52:35,269 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:35,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash 894443, now seen corresponding path program 1 times [2024-11-09 10:52:35,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:35,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215572550] [2024-11-09 10:52:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:35,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:35,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215572550] [2024-11-09 10:52:35,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215572550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:35,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:35,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:52:35,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872643303] [2024-11-09 10:52:35,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:35,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:52:35,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:52:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:52:35,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-09 10:52:35,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:35,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:35,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-09 10:52:35,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:35,834 INFO L124 PetriNetUnfolderBase]: 333/710 cut-off events. [2024-11-09 10:52:35,835 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-09 10:52:35,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 710 events. 333/710 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3932 event pairs, 226 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1197. Up to 485 conditions per place. [2024-11-09 10:52:35,844 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-09 10:52:35,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 168 flow [2024-11-09 10:52:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:52:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:52:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-09 10:52:35,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5847457627118644 [2024-11-09 10:52:35,849 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 112 flow. Second operand 4 states and 138 transitions. [2024-11-09 10:52:35,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 168 flow [2024-11-09 10:52:35,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:35,851 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 114 flow [2024-11-09 10:52:35,852 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-09 10:52:35,852 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-09 10:52:35,853 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 114 flow [2024-11-09 10:52:35,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:35,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:35,854 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:52:35,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:52:35,855 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:35,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 27730020, now seen corresponding path program 1 times [2024-11-09 10:52:35,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:35,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405573006] [2024-11-09 10:52:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:35,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:35,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:35,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405573006] [2024-11-09 10:52:35,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405573006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:35,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:35,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:52:35,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959198599] [2024-11-09 10:52:35,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:35,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:52:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:52:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:52:35,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-09 10:52:35,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:35,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:35,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-09 10:52:35,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:36,117 INFO L124 PetriNetUnfolderBase]: 333/716 cut-off events. [2024-11-09 10:52:36,117 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-09 10:52:36,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 716 events. 333/716 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3935 event pairs, 226 based on Foata normal form. 1/595 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-09 10:52:36,123 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 28 selfloop transitions, 4 changer transitions 1/55 dead transitions. [2024-11-09 10:52:36,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 196 flow [2024-11-09 10:52:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:52:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:52:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-09 10:52:36,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2024-11-09 10:52:36,126 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-09 10:52:36,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 196 flow [2024-11-09 10:52:36,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:52:36,128 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 132 flow [2024-11-09 10:52:36,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-11-09 10:52:36,129 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2024-11-09 10:52:36,129 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 132 flow [2024-11-09 10:52:36,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:36,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:36,130 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:52:36,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:52:36,130 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:36,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 877435966, now seen corresponding path program 1 times [2024-11-09 10:52:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15155261] [2024-11-09 10:52:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:36,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15155261] [2024-11-09 10:52:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15155261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402470259] [2024-11-09 10:52:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:36,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:36,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:36,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:52:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:36,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:52:36,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:36,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:52:36,669 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:52:36,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-09 10:52:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:36,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:36,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402470259] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:36,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:52:36,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-09 10:52:36,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194261345] [2024-11-09 10:52:36,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:36,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:52:36,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:52:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:52:36,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-09 10:52:36,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:36,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:36,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-09 10:52:36,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:36,998 INFO L124 PetriNetUnfolderBase]: 333/714 cut-off events. [2024-11-09 10:52:36,998 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-09 10:52:37,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 714 events. 333/714 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3932 event pairs, 226 based on Foata normal form. 1/596 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-09 10:52:37,004 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-09 10:52:37,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 204 flow [2024-11-09 10:52:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:52:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:52:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-09 10:52:37,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5728813559322034 [2024-11-09 10:52:37,007 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 132 flow. Second operand 5 states and 169 transitions. [2024-11-09 10:52:37,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 204 flow [2024-11-09 10:52:37,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 194 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:37,009 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 136 flow [2024-11-09 10:52:37,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-09 10:52:37,010 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-11-09 10:52:37,010 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 136 flow [2024-11-09 10:52:37,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:37,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:37,011 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:37,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:52:37,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:37,216 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:37,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1402402505, now seen corresponding path program 1 times [2024-11-09 10:52:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:37,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173382850] [2024-11-09 10:52:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:37,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:37,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:37,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173382850] [2024-11-09 10:52:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173382850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:37,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318950771] [2024-11-09 10:52:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:37,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:37,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:37,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:52:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:37,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:52:37,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:37,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318950771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:37,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 10:52:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23510598] [2024-11-09 10:52:37,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:37,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:52:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:52:37,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:52:37,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-09 10:52:37,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 136 flow. Second operand has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:37,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:37,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-09 10:52:37,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:37,970 INFO L124 PetriNetUnfolderBase]: 665/1426 cut-off events. [2024-11-09 10:52:37,970 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:52:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 1426 events. 665/1426 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8973 event pairs, 452 based on Foata normal form. 1/1204 useless extension candidates. Maximal degree in co-relation 1217. Up to 485 conditions per place. [2024-11-09 10:52:37,979 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 48 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-11-09 10:52:37,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 348 flow [2024-11-09 10:52:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:52:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:52:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 295 transitions. [2024-11-09 10:52:37,981 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-09 10:52:37,981 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 136 flow. Second operand 8 states and 295 transitions. [2024-11-09 10:52:37,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 348 flow [2024-11-09 10:52:37,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:37,983 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 209 flow [2024-11-09 10:52:37,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-09 10:52:37,984 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-11-09 10:52:37,984 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 209 flow [2024-11-09 10:52:37,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:37,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:37,985 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-09 10:52:37,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:52:38,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:38,190 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:38,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2097608099, now seen corresponding path program 2 times [2024-11-09 10:52:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:38,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335573326] [2024-11-09 10:52:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:38,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:38,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335573326] [2024-11-09 10:52:38,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335573326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:38,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232847376] [2024-11-09 10:52:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:52:38,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:38,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:38,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:52:38,590 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:52:38,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:52:38,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:52:38,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:38,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:52:38,747 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:52:38,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-09 10:52:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:38,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232847376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:39,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-09 10:52:39,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498332669] [2024-11-09 10:52:39,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:39,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:52:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:52:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:52:39,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-09 10:52:39,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 209 flow. Second operand has 19 states, 19 states have (on average 28.57894736842105) internal successors, (543), 19 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:39,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:39,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-09 10:52:39,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:40,560 INFO L124 PetriNetUnfolderBase]: 666/1435 cut-off events. [2024-11-09 10:52:40,561 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-09 10:52:40,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 1435 events. 666/1435 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8885 event pairs, 452 based on Foata normal form. 4/1216 useless extension candidates. Maximal degree in co-relation 1235. Up to 488 conditions per place. [2024-11-09 10:52:40,571 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 57 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-11-09 10:52:40,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 483 flow [2024-11-09 10:52:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:52:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:52:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 374 transitions. [2024-11-09 10:52:40,573 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.576271186440678 [2024-11-09 10:52:40,574 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 209 flow. Second operand 11 states and 374 transitions. [2024-11-09 10:52:40,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 483 flow [2024-11-09 10:52:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 455 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-09 10:52:40,577 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 283 flow [2024-11-09 10:52:40,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=283, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-09 10:52:40,578 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-09 10:52:40,578 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 283 flow [2024-11-09 10:52:40,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 28.57894736842105) internal successors, (543), 19 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:40,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:40,579 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:40,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:52:40,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:40,784 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:40,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1830191831, now seen corresponding path program 1 times [2024-11-09 10:52:40,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:40,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627553329] [2024-11-09 10:52:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:40,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627553329] [2024-11-09 10:52:40,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627553329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885521475] [2024-11-09 10:52:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:40,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:40,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:40,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:40,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:52:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:41,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 10:52:41,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:41,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:52:41,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:52:41,152 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:52:41,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:52:41,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-09 10:52:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:41,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:41,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885521475] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:41,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:52:41,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-09 10:52:41,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390993914] [2024-11-09 10:52:41,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:41,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:52:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:41,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:52:41,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:52:41,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-09 10:52:41,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:41,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:41,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-09 10:52:41,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:42,255 INFO L124 PetriNetUnfolderBase]: 1338/2735 cut-off events. [2024-11-09 10:52:42,257 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-09 10:52:42,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 2735 events. 1338/2735 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19506 event pairs, 526 based on Foata normal form. 0/2321 useless extension candidates. Maximal degree in co-relation 4773. Up to 1241 conditions per place. [2024-11-09 10:52:42,284 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 48 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-11-09 10:52:42,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 445 flow [2024-11-09 10:52:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:52:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:52:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-11-09 10:52:42,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5738498789346247 [2024-11-09 10:52:42,286 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 283 flow. Second operand 7 states and 237 transitions. [2024-11-09 10:52:42,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 445 flow [2024-11-09 10:52:42,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 418 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-09 10:52:42,292 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 305 flow [2024-11-09 10:52:42,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2024-11-09 10:52:42,293 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 19 predicate places. [2024-11-09 10:52:42,294 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 305 flow [2024-11-09 10:52:42,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:42,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:42,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:42,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:52:42,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:42,496 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:42,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1830191830, now seen corresponding path program 1 times [2024-11-09 10:52:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:42,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462755264] [2024-11-09 10:52:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462755264] [2024-11-09 10:52:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462755264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:52:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501218494] [2024-11-09 10:52:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:42,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:52:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:52:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:52:42,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-11-09 10:52:42,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:42,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:42,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-11-09 10:52:42,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:43,010 INFO L124 PetriNetUnfolderBase]: 1710/3085 cut-off events. [2024-11-09 10:52:43,010 INFO L125 PetriNetUnfolderBase]: For 1904/2052 co-relation queries the response was YES. [2024-11-09 10:52:43,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6930 conditions, 3085 events. 1710/3085 cut-off events. For 1904/2052 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19393 event pairs, 1216 based on Foata normal form. 246/3221 useless extension candidates. Maximal degree in co-relation 6895. Up to 2393 conditions per place. [2024-11-09 10:52:43,029 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 42 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-09 10:52:43,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 65 transitions, 397 flow [2024-11-09 10:52:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:52:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:52:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-09 10:52:43,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4711864406779661 [2024-11-09 10:52:43,031 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 305 flow. Second operand 5 states and 139 transitions. [2024-11-09 10:52:43,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 65 transitions, 397 flow [2024-11-09 10:52:43,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 386 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:52:43,034 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 302 flow [2024-11-09 10:52:43,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2024-11-09 10:52:43,036 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 17 predicate places. [2024-11-09 10:52:43,037 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 302 flow [2024-11-09 10:52:43,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:43,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:43,037 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-09 10:52:43,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:52:43,037 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:43,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1461750510, now seen corresponding path program 3 times [2024-11-09 10:52:43,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:43,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498953295] [2024-11-09 10:52:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:43,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:43,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:43,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498953295] [2024-11-09 10:52:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498953295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:43,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777019804] [2024-11-09 10:52:43,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:52:43,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:43,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:43,173 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:43,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:52:43,245 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:52:43,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:52:43,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 10:52:43,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:43,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:52:43,347 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:52:43,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-09 10:52:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:43,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777019804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:43,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:43,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-09 10:52:43,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302256918] [2024-11-09 10:52:43,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:43,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:52:43,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:52:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:52:44,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-09 10:52:44,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 302 flow. Second operand has 18 states, 18 states have (on average 28.77777777777778) internal successors, (518), 18 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:44,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:44,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-09 10:52:44,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:45,280 INFO L124 PetriNetUnfolderBase]: 866/1778 cut-off events. [2024-11-09 10:52:45,280 INFO L125 PetriNetUnfolderBase]: For 1010/1232 co-relation queries the response was YES. [2024-11-09 10:52:45,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3790 conditions, 1778 events. 866/1778 cut-off events. For 1010/1232 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11591 event pairs, 612 based on Foata normal form. 3/1563 useless extension candidates. Maximal degree in co-relation 3733. Up to 1242 conditions per place. [2024-11-09 10:52:45,293 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 25 selfloop transitions, 27 changer transitions 0/71 dead transitions. [2024-11-09 10:52:45,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 71 transitions, 444 flow [2024-11-09 10:52:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 10:52:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 10:52:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 513 transitions. [2024-11-09 10:52:45,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114656031904287 [2024-11-09 10:52:45,295 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 302 flow. Second operand 17 states and 513 transitions. [2024-11-09 10:52:45,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 71 transitions, 444 flow [2024-11-09 10:52:45,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 71 transitions, 422 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:52:45,299 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 371 flow [2024-11-09 10:52:45,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=371, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2024-11-09 10:52:45,299 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-11-09 10:52:45,300 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 371 flow [2024-11-09 10:52:45,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 28.77777777777778) internal successors, (518), 18 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:45,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:45,300 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:45,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:52:45,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:45,505 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:45,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:45,505 INFO L85 PathProgramCache]: Analyzing trace with hash 901372759, now seen corresponding path program 1 times [2024-11-09 10:52:45,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:45,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993025095] [2024-11-09 10:52:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:45,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:45,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993025095] [2024-11-09 10:52:45,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993025095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:45,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:45,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:52:45,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471581709] [2024-11-09 10:52:45,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:45,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:52:45,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:52:45,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:52:45,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-09 10:52:45,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:45,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:45,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-09 10:52:45,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:45,819 INFO L124 PetriNetUnfolderBase]: 866/1694 cut-off events. [2024-11-09 10:52:45,820 INFO L125 PetriNetUnfolderBase]: For 1005/1227 co-relation queries the response was YES. [2024-11-09 10:52:45,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3733 conditions, 1694 events. 866/1694 cut-off events. For 1005/1227 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10483 event pairs, 612 based on Foata normal form. 78/1638 useless extension candidates. Maximal degree in co-relation 1901. Up to 1242 conditions per place. [2024-11-09 10:52:45,831 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 45 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-11-09 10:52:45,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 66 transitions, 465 flow [2024-11-09 10:52:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:52:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:52:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-09 10:52:45,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.538135593220339 [2024-11-09 10:52:45,833 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 371 flow. Second operand 4 states and 127 transitions. [2024-11-09 10:52:45,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 66 transitions, 465 flow [2024-11-09 10:52:45,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 377 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-11-09 10:52:45,836 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 287 flow [2024-11-09 10:52:45,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-09 10:52:45,836 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-09 10:52:45,837 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 287 flow [2024-11-09 10:52:45,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:45,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:45,837 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:45,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:52:45,837 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:45,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash 901372760, now seen corresponding path program 1 times [2024-11-09 10:52:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:45,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187046753] [2024-11-09 10:52:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187046753] [2024-11-09 10:52:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187046753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708868906] [2024-11-09 10:52:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:46,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:46,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:52:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:46,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:52:46,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:46,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:46,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:52:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:46,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708868906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:46,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:46,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-09 10:52:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817010665] [2024-11-09 10:52:46,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:46,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:52:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:46,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:52:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:52:46,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:52:46,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 287 flow. Second operand has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:46,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:46,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:52:46,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:46,741 INFO L124 PetriNetUnfolderBase]: 1142/2182 cut-off events. [2024-11-09 10:52:46,742 INFO L125 PetriNetUnfolderBase]: For 886/1054 co-relation queries the response was YES. [2024-11-09 10:52:46,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4828 conditions, 2182 events. 1142/2182 cut-off events. For 886/1054 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13746 event pairs, 490 based on Foata normal form. 136/2183 useless extension candidates. Maximal degree in co-relation 2360. Up to 1326 conditions per place. [2024-11-09 10:52:46,754 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 50 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-11-09 10:52:46,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 451 flow [2024-11-09 10:52:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:52:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:52:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-09 10:52:46,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2024-11-09 10:52:46,757 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 287 flow. Second operand 6 states and 217 transitions. [2024-11-09 10:52:46,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 451 flow [2024-11-09 10:52:46,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 445 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:52:46,761 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 324 flow [2024-11-09 10:52:46,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2024-11-09 10:52:46,762 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-11-09 10:52:46,762 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 324 flow [2024-11-09 10:52:46,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:46,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:46,762 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:46,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:52:46,963 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 [2024-11-09 10:52:46,964 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:46,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2128554220, now seen corresponding path program 1 times [2024-11-09 10:52:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:46,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376832288] [2024-11-09 10:52:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376832288] [2024-11-09 10:52:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376832288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867107785] [2024-11-09 10:52:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:47,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:47,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:47,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:52:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:47,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:52:47,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:47,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:47,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867107785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:47,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:47,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:52:47,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250032227] [2024-11-09 10:52:47,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:47,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:52:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:52:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:52:47,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:52:47,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 324 flow. Second operand has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:47,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:47,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:52:47,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:47,757 INFO L124 PetriNetUnfolderBase]: 902/1663 cut-off events. [2024-11-09 10:52:47,757 INFO L125 PetriNetUnfolderBase]: For 2757/3056 co-relation queries the response was YES. [2024-11-09 10:52:47,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4387 conditions, 1663 events. 902/1663 cut-off events. For 2757/3056 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9350 event pairs, 517 based on Foata normal form. 0/1520 useless extension candidates. Maximal degree in co-relation 2733. Up to 830 conditions per place. [2024-11-09 10:52:47,769 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 65 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-11-09 10:52:47,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 102 transitions, 642 flow [2024-11-09 10:52:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:52:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:52:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 324 transitions. [2024-11-09 10:52:47,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-09 10:52:47,771 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 324 flow. Second operand 9 states and 324 transitions. [2024-11-09 10:52:47,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 102 transitions, 642 flow [2024-11-09 10:52:47,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 102 transitions, 596 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:52:47,775 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 351 flow [2024-11-09 10:52:47,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2024-11-09 10:52:47,776 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2024-11-09 10:52:47,776 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 351 flow [2024-11-09 10:52:47,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:47,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:47,777 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:47,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:52:47,977 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 [2024-11-09 10:52:47,977 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:47,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:47,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1364141571, now seen corresponding path program 1 times [2024-11-09 10:52:47,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:47,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184695757] [2024-11-09 10:52:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:47,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:48,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:48,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184695757] [2024-11-09 10:52:48,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184695757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:48,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448448059] [2024-11-09 10:52:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:48,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:48,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:48,091 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:48,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:52:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:48,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:52:48,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:48,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:48,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448448059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:48,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:48,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:52:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104343844] [2024-11-09 10:52:48,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:48,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:52:48,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:52:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:52:48,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:52:48,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 351 flow. Second operand has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:48,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:48,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:52:48,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:48,747 INFO L124 PetriNetUnfolderBase]: 1016/1900 cut-off events. [2024-11-09 10:52:48,747 INFO L125 PetriNetUnfolderBase]: For 1371/1490 co-relation queries the response was YES. [2024-11-09 10:52:48,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4742 conditions, 1900 events. 1016/1900 cut-off events. For 1371/1490 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11063 event pairs, 571 based on Foata normal form. 32/1816 useless extension candidates. Maximal degree in co-relation 2901. Up to 952 conditions per place. [2024-11-09 10:52:48,760 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 72 selfloop transitions, 24 changer transitions 0/111 dead transitions. [2024-11-09 10:52:48,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 678 flow [2024-11-09 10:52:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:52:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:52:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 365 transitions. [2024-11-09 10:52:48,763 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6186440677966102 [2024-11-09 10:52:48,764 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 351 flow. Second operand 10 states and 365 transitions. [2024-11-09 10:52:48,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 678 flow [2024-11-09 10:52:48,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 111 transitions, 639 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:52:48,769 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 404 flow [2024-11-09 10:52:48,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=404, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-11-09 10:52:48,770 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2024-11-09 10:52:48,770 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 404 flow [2024-11-09 10:52:48,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:48,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:48,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:48,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:52:48,972 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 [2024-11-09 10:52:48,973 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:48,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1158569841, now seen corresponding path program 1 times [2024-11-09 10:52:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:48,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070341378] [2024-11-09 10:52:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:49,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:49,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070341378] [2024-11-09 10:52:49,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070341378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:49,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:52:49,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:52:49,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506950663] [2024-11-09 10:52:49,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:49,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:52:49,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:52:49,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:52:49,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-09 10:52:49,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:49,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:49,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-09 10:52:49,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:49,732 INFO L124 PetriNetUnfolderBase]: 1286/2304 cut-off events. [2024-11-09 10:52:49,733 INFO L125 PetriNetUnfolderBase]: For 5115/5652 co-relation queries the response was YES. [2024-11-09 10:52:49,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 2304 events. 1286/2304 cut-off events. For 5115/5652 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13266 event pairs, 527 based on Foata normal form. 0/2175 useless extension candidates. Maximal degree in co-relation 4262. Up to 1092 conditions per place. [2024-11-09 10:52:49,751 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 67 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-11-09 10:52:49,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 679 flow [2024-11-09 10:52:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:52:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:52:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-11-09 10:52:49,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451977401129944 [2024-11-09 10:52:49,753 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 404 flow. Second operand 6 states and 193 transitions. [2024-11-09 10:52:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 679 flow [2024-11-09 10:52:49,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 636 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-09 10:52:49,758 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 409 flow [2024-11-09 10:52:49,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2024-11-09 10:52:49,759 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-09 10:52:49,759 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 409 flow [2024-11-09 10:52:49,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:49,759 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:49,759 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:49,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:52:49,760 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:49,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1555925836, now seen corresponding path program 1 times [2024-11-09 10:52:49,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:49,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194076119] [2024-11-09 10:52:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:49,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:49,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194076119] [2024-11-09 10:52:49,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194076119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:49,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138842929] [2024-11-09 10:52:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:49,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:49,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:49,996 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:49,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:52:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:50,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:52:50,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:50,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:50,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-09 10:52:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138842929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:50,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:50,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-09 10:52:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323245928] [2024-11-09 10:52:50,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:50,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:52:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:52:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:52:51,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:52:51,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 409 flow. Second operand has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:51,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:51,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:52:51,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:52,039 INFO L124 PetriNetUnfolderBase]: 1219/2135 cut-off events. [2024-11-09 10:52:52,039 INFO L125 PetriNetUnfolderBase]: For 5641/6236 co-relation queries the response was YES. [2024-11-09 10:52:52,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 2135 events. 1219/2135 cut-off events. For 5641/6236 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12024 event pairs, 527 based on Foata normal form. 6/2020 useless extension candidates. Maximal degree in co-relation 4600. Up to 664 conditions per place. [2024-11-09 10:52:52,054 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 87 selfloop transitions, 33 changer transitions 0/136 dead transitions. [2024-11-09 10:52:52,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 963 flow [2024-11-09 10:52:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:52:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:52:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 524 transitions. [2024-11-09 10:52:52,058 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.592090395480226 [2024-11-09 10:52:52,058 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 409 flow. Second operand 15 states and 524 transitions. [2024-11-09 10:52:52,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 963 flow [2024-11-09 10:52:52,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 951 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:52:52,066 INFO L231 Difference]: Finished difference. Result has 108 places, 82 transitions, 532 flow [2024-11-09 10:52:52,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=532, PETRI_PLACES=108, PETRI_TRANSITIONS=82} [2024-11-09 10:52:52,067 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 48 predicate places. [2024-11-09 10:52:52,067 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 82 transitions, 532 flow [2024-11-09 10:52:52,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:52,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:52,068 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:52,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:52:52,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:52:52,269 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:52,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:52,270 INFO L85 PathProgramCache]: Analyzing trace with hash 395776527, now seen corresponding path program 2 times [2024-11-09 10:52:52,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:52,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134605701] [2024-11-09 10:52:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:52,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:52,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:52,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134605701] [2024-11-09 10:52:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134605701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:52,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471662113] [2024-11-09 10:52:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:52:52,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:52,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:52,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:52:52,546 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:52:52,546 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:52:52,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:52:52,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:52,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:52:52,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:52:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:52:52,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:52:52,659 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:52:52,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:52:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:52:52,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:52:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471662113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:52:52,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:52:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-09 10:52:52,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407712429] [2024-11-09 10:52:52,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:52:52,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:52:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:52:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:52:53,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-09 10:52:53,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 82 transitions, 532 flow. Second operand has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:53,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:53,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-09 10:52:53,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:53,401 INFO L124 PetriNetUnfolderBase]: 1358/2352 cut-off events. [2024-11-09 10:52:53,401 INFO L125 PetriNetUnfolderBase]: For 7968/8588 co-relation queries the response was YES. [2024-11-09 10:52:53,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8640 conditions, 2352 events. 1358/2352 cut-off events. For 7968/8588 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13314 event pairs, 400 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 5891. Up to 829 conditions per place. [2024-11-09 10:52:53,421 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 92 selfloop transitions, 14 changer transitions 0/120 dead transitions. [2024-11-09 10:52:53,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 120 transitions, 1016 flow [2024-11-09 10:52:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:52:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:52:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-11-09 10:52:53,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5351089588377724 [2024-11-09 10:52:53,427 INFO L175 Difference]: Start difference. First operand has 108 places, 82 transitions, 532 flow. Second operand 7 states and 221 transitions. [2024-11-09 10:52:53,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 120 transitions, 1016 flow [2024-11-09 10:52:53,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 120 transitions, 948 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-09 10:52:53,436 INFO L231 Difference]: Finished difference. Result has 105 places, 81 transitions, 500 flow [2024-11-09 10:52:53,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=500, PETRI_PLACES=105, PETRI_TRANSITIONS=81} [2024-11-09 10:52:53,437 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2024-11-09 10:52:53,437 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 81 transitions, 500 flow [2024-11-09 10:52:53,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:53,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:53,438 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:53,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:52:53,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:52:53,643 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:53,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash -615828695, now seen corresponding path program 1 times [2024-11-09 10:52:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864744720] [2024-11-09 10:52:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:53,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:52:53,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:53,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864744720] [2024-11-09 10:52:53,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864744720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:53,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649891761] [2024-11-09 10:52:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:53,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:53,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:53,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:53,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:52:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:53,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:52:53,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:54,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:54,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:52:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:54,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649891761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:54,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:54,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-09 10:52:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803990256] [2024-11-09 10:52:54,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:54,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:52:54,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:52:54,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:52:54,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:52:54,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 81 transitions, 500 flow. Second operand has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:54,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:54,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:52:54,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:55,328 INFO L124 PetriNetUnfolderBase]: 1758/3140 cut-off events. [2024-11-09 10:52:55,328 INFO L125 PetriNetUnfolderBase]: For 9445/10316 co-relation queries the response was YES. [2024-11-09 10:52:55,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11293 conditions, 3140 events. 1758/3140 cut-off events. For 9445/10316 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 18190 event pairs, 582 based on Foata normal form. 0/3032 useless extension candidates. Maximal degree in co-relation 8387. Up to 888 conditions per place. [2024-11-09 10:52:55,355 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 104 selfloop transitions, 24 changer transitions 0/143 dead transitions. [2024-11-09 10:52:55,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 1096 flow [2024-11-09 10:52:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:52:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:52:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 492 transitions. [2024-11-09 10:52:55,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5956416464891041 [2024-11-09 10:52:55,358 INFO L175 Difference]: Start difference. First operand has 105 places, 81 transitions, 500 flow. Second operand 14 states and 492 transitions. [2024-11-09 10:52:55,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 1096 flow [2024-11-09 10:52:55,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 1062 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:52:55,368 INFO L231 Difference]: Finished difference. Result has 115 places, 85 transitions, 555 flow [2024-11-09 10:52:55,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=555, PETRI_PLACES=115, PETRI_TRANSITIONS=85} [2024-11-09 10:52:55,369 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-11-09 10:52:55,369 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 85 transitions, 555 flow [2024-11-09 10:52:55,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:55,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:55,369 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:55,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:52:55,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:52:55,574 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:55,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash -419299742, now seen corresponding path program 2 times [2024-11-09 10:52:55,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:55,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051822505] [2024-11-09 10:52:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:55,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:55,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051822505] [2024-11-09 10:52:55,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051822505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762633852] [2024-11-09 10:52:55,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:52:55,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:55,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:55,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:55,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:52:55,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:52:55,959 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:52:55,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 10:52:55,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:55,968 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 [2024-11-09 10:52:56,038 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-09 10:52:56,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 10:52:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:52:56,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:56,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762633852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:56,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:56,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2024-11-09 10:52:56,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961368747] [2024-11-09 10:52:56,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:56,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:52:56,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:52:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:52:57,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-09 10:52:57,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 85 transitions, 555 flow. Second operand has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:57,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:57,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-09 10:52:57,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:58,498 INFO L124 PetriNetUnfolderBase]: 3015/4950 cut-off events. [2024-11-09 10:52:58,498 INFO L125 PetriNetUnfolderBase]: For 12907/13514 co-relation queries the response was YES. [2024-11-09 10:52:58,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18413 conditions, 4950 events. 3015/4950 cut-off events. For 12907/13514 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 29028 event pairs, 1070 based on Foata normal form. 86/4878 useless extension candidates. Maximal degree in co-relation 15001. Up to 1627 conditions per place. [2024-11-09 10:52:58,539 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 135 selfloop transitions, 24 changer transitions 0/172 dead transitions. [2024-11-09 10:52:58,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 172 transitions, 1329 flow [2024-11-09 10:52:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:52:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:52:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 464 transitions. [2024-11-09 10:52:58,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5242937853107345 [2024-11-09 10:52:58,541 INFO L175 Difference]: Start difference. First operand has 115 places, 85 transitions, 555 flow. Second operand 15 states and 464 transitions. [2024-11-09 10:52:58,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 172 transitions, 1329 flow [2024-11-09 10:52:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 1280 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-11-09 10:52:58,558 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 612 flow [2024-11-09 10:52:58,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=612, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2024-11-09 10:52:58,558 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-11-09 10:52:58,558 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 612 flow [2024-11-09 10:52:58,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:52:58,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:58,559 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:58,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 10:52:58,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:52:58,764 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:52:58,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash -113389267, now seen corresponding path program 1 times [2024-11-09 10:52:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611041852] [2024-11-09 10:52:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:52:59,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611041852] [2024-11-09 10:52:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611041852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002945482] [2024-11-09 10:52:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:59,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:59,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:59,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:59,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:52:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:59,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:52:59,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:59,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:59,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:52:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:52:59,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002945482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:52:59,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:52:59,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-09 10:52:59,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276657098] [2024-11-09 10:52:59,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:52:59,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:52:59,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:52:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:52:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:53:00,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:53:00,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 612 flow. Second operand has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:00,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:00,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:53:00,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:01,130 INFO L124 PetriNetUnfolderBase]: 2183/4043 cut-off events. [2024-11-09 10:53:01,131 INFO L125 PetriNetUnfolderBase]: For 14894/15805 co-relation queries the response was YES. [2024-11-09 10:53:01,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15441 conditions, 4043 events. 2183/4043 cut-off events. For 14894/15805 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 25353 event pairs, 886 based on Foata normal form. 86/4037 useless extension candidates. Maximal degree in co-relation 12523. Up to 1627 conditions per place. [2024-11-09 10:53:01,150 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 101 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-11-09 10:53:01,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 139 transitions, 1102 flow [2024-11-09 10:53:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:53:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:53:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 427 transitions. [2024-11-09 10:53:01,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031073446327684 [2024-11-09 10:53:01,152 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 612 flow. Second operand 12 states and 427 transitions. [2024-11-09 10:53:01,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 139 transitions, 1102 flow [2024-11-09 10:53:01,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 139 transitions, 1059 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-11-09 10:53:01,165 INFO L231 Difference]: Finished difference. Result has 124 places, 89 transitions, 616 flow [2024-11-09 10:53:01,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=616, PETRI_PLACES=124, PETRI_TRANSITIONS=89} [2024-11-09 10:53:01,166 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-11-09 10:53:01,166 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 89 transitions, 616 flow [2024-11-09 10:53:01,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:01,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:01,166 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:01,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:53:01,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:01,371 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:01,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1600887366, now seen corresponding path program 1 times [2024-11-09 10:53:01,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:01,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439211712] [2024-11-09 10:53:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:01,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:01,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439211712] [2024-11-09 10:53:01,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439211712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:01,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019634395] [2024-11-09 10:53:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:01,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:01,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:01,501 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:01,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:53:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:01,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:53:01,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:01,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:01,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019634395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:01,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:01,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:53:01,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566337487] [2024-11-09 10:53:01,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:01,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:53:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:53:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:53:01,896 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:53:01,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 89 transitions, 616 flow. Second operand has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:01,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:01,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:53:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:02,369 INFO L124 PetriNetUnfolderBase]: 2392/3797 cut-off events. [2024-11-09 10:53:02,369 INFO L125 PetriNetUnfolderBase]: For 19364/21249 co-relation queries the response was YES. [2024-11-09 10:53:02,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15561 conditions, 3797 events. 2392/3797 cut-off events. For 19364/21249 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20130 event pairs, 1371 based on Foata normal form. 28/3757 useless extension candidates. Maximal degree in co-relation 13178. Up to 2600 conditions per place. [2024-11-09 10:53:02,397 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 77 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2024-11-09 10:53:02,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 118 transitions, 945 flow [2024-11-09 10:53:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:53:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:53:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 359 transitions. [2024-11-09 10:53:02,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6084745762711864 [2024-11-09 10:53:02,399 INFO L175 Difference]: Start difference. First operand has 124 places, 89 transitions, 616 flow. Second operand 10 states and 359 transitions. [2024-11-09 10:53:02,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 118 transitions, 945 flow [2024-11-09 10:53:02,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 118 transitions, 896 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-11-09 10:53:02,410 INFO L231 Difference]: Finished difference. Result has 121 places, 88 transitions, 614 flow [2024-11-09 10:53:02,410 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=614, PETRI_PLACES=121, PETRI_TRANSITIONS=88} [2024-11-09 10:53:02,410 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-11-09 10:53:02,411 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 88 transitions, 614 flow [2024-11-09 10:53:02,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:02,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:02,411 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:02,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:02,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:02,612 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:02,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1592873326, now seen corresponding path program 3 times [2024-11-09 10:53:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:02,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816619691] [2024-11-09 10:53:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:02,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:53:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:02,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816619691] [2024-11-09 10:53:02,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816619691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:02,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311909845] [2024-11-09 10:53:02,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:53:02,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:02,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:02,750 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:02,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:53:02,837 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:53:02,838 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:53:02,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:53:02,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:02,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:53:02,911 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:53:02,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:53:02,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:53:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:53:03,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:03,163 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 42 treesize of output 38 [2024-11-09 10:53:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:53:03,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311909845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:03,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-09 10:53:03,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399305753] [2024-11-09 10:53:03,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:03,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:53:03,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:53:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:53:03,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-09 10:53:03,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 88 transitions, 614 flow. Second operand has 22 states, 22 states have (on average 24.40909090909091) internal successors, (537), 22 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:03,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:03,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-09 10:53:03,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:06,182 INFO L124 PetriNetUnfolderBase]: 10336/15336 cut-off events. [2024-11-09 10:53:06,182 INFO L125 PetriNetUnfolderBase]: For 33861/35857 co-relation queries the response was YES. [2024-11-09 10:53:06,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57564 conditions, 15336 events. 10336/15336 cut-off events. For 33861/35857 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 91115 event pairs, 2299 based on Foata normal form. 324/15660 useless extension candidates. Maximal degree in co-relation 54058. Up to 2839 conditions per place. [2024-11-09 10:53:06,274 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 274 selfloop transitions, 37 changer transitions 0/320 dead transitions. [2024-11-09 10:53:06,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 320 transitions, 2526 flow [2024-11-09 10:53:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 10:53:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-09 10:53:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 715 transitions. [2024-11-09 10:53:06,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52689756816507 [2024-11-09 10:53:06,276 INFO L175 Difference]: Start difference. First operand has 121 places, 88 transitions, 614 flow. Second operand 23 states and 715 transitions. [2024-11-09 10:53:06,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 320 transitions, 2526 flow [2024-11-09 10:53:06,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 320 transitions, 2467 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-09 10:53:06,331 INFO L231 Difference]: Finished difference. Result has 140 places, 96 transitions, 748 flow [2024-11-09 10:53:06,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=748, PETRI_PLACES=140, PETRI_TRANSITIONS=96} [2024-11-09 10:53:06,331 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2024-11-09 10:53:06,331 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 96 transitions, 748 flow [2024-11-09 10:53:06,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.40909090909091) internal successors, (537), 22 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:06,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:06,332 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:06,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:53:06,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:06,537 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:06,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash -682628513, now seen corresponding path program 2 times [2024-11-09 10:53:06,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545197766] [2024-11-09 10:53:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:06,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:53:06,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:06,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545197766] [2024-11-09 10:53:06,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545197766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:06,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865170279] [2024-11-09 10:53:06,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:53:06,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:06,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:06,917 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:06,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:53:07,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:53:07,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:53:07,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 10:53:07,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:07,011 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 [2024-11-09 10:53:07,112 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 10:53:07,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-09 10:53:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:07,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:08,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865170279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:08,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:08,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2024-11-09 10:53:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580634822] [2024-11-09 10:53:08,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:08,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 10:53:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 10:53:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2024-11-09 10:53:09,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-09 10:53:09,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 96 transitions, 748 flow. Second operand has 30 states, 30 states have (on average 24.233333333333334) internal successors, (727), 30 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:09,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:09,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-09 10:53:09,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:12,407 INFO L124 PetriNetUnfolderBase]: 8146/12058 cut-off events. [2024-11-09 10:53:12,407 INFO L125 PetriNetUnfolderBase]: For 90229/96237 co-relation queries the response was YES. [2024-11-09 10:53:12,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54161 conditions, 12058 events. 8146/12058 cut-off events. For 90229/96237 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 73098 event pairs, 1300 based on Foata normal form. 618/12558 useless extension candidates. Maximal degree in co-relation 50682. Up to 2609 conditions per place. [2024-11-09 10:53:12,501 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 270 selfloop transitions, 49 changer transitions 0/335 dead transitions. [2024-11-09 10:53:12,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 335 transitions, 3295 flow [2024-11-09 10:53:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 10:53:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-09 10:53:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 944 transitions. [2024-11-09 10:53:12,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-11-09 10:53:12,504 INFO L175 Difference]: Start difference. First operand has 140 places, 96 transitions, 748 flow. Second operand 33 states and 944 transitions. [2024-11-09 10:53:12,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 335 transitions, 3295 flow [2024-11-09 10:53:12,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 335 transitions, 3138 flow, removed 60 selfloop flow, removed 10 redundant places. [2024-11-09 10:53:12,555 INFO L231 Difference]: Finished difference. Result has 163 places, 116 transitions, 965 flow [2024-11-09 10:53:12,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=965, PETRI_PLACES=163, PETRI_TRANSITIONS=116} [2024-11-09 10:53:12,556 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 103 predicate places. [2024-11-09 10:53:12,556 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 116 transitions, 965 flow [2024-11-09 10:53:12,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 24.233333333333334) internal successors, (727), 30 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:12,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:12,557 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:12,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:12,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 10:53:12,757 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:12,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash -196098730, now seen corresponding path program 1 times [2024-11-09 10:53:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464309810] [2024-11-09 10:53:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464309810] [2024-11-09 10:53:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464309810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281128728] [2024-11-09 10:53:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:12,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:12,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:12,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:53:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:12,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:53:12,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:12,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:13,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281128728] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:13,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:53:13,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-09 10:53:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889890218] [2024-11-09 10:53:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:13,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:53:13,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:53:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:53:13,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:53:13,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 116 transitions, 965 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:13,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:13,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:53:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:14,387 INFO L124 PetriNetUnfolderBase]: 6948/11415 cut-off events. [2024-11-09 10:53:14,388 INFO L125 PetriNetUnfolderBase]: For 48635/49914 co-relation queries the response was YES. [2024-11-09 10:53:14,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49617 conditions, 11415 events. 6948/11415 cut-off events. For 48635/49914 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 78794 event pairs, 2716 based on Foata normal form. 344/11397 useless extension candidates. Maximal degree in co-relation 49533. Up to 5549 conditions per place. [2024-11-09 10:53:14,497 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 110 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2024-11-09 10:53:14,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 143 transitions, 1391 flow [2024-11-09 10:53:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-11-09 10:53:14,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6271186440677966 [2024-11-09 10:53:14,499 INFO L175 Difference]: Start difference. First operand has 163 places, 116 transitions, 965 flow. Second operand 5 states and 185 transitions. [2024-11-09 10:53:14,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 143 transitions, 1391 flow [2024-11-09 10:53:14,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 143 transitions, 1284 flow, removed 14 selfloop flow, removed 20 redundant places. [2024-11-09 10:53:14,599 INFO L231 Difference]: Finished difference. Result has 147 places, 113 transitions, 866 flow [2024-11-09 10:53:14,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=147, PETRI_TRANSITIONS=113} [2024-11-09 10:53:14,600 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2024-11-09 10:53:14,600 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 113 transitions, 866 flow [2024-11-09 10:53:14,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:14,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:14,600 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:14,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 10:53:14,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:14,801 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:14,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash 313353444, now seen corresponding path program 1 times [2024-11-09 10:53:14,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:14,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774531647] [2024-11-09 10:53:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:53:15,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:15,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774531647] [2024-11-09 10:53:15,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774531647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:15,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262216089] [2024-11-09 10:53:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:15,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:15,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:15,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:15,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:53:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:15,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:53:15,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:15,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:15,860 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 36 treesize of output 32 [2024-11-09 10:53:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262216089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:16,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-11-09 10:53:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185286406] [2024-11-09 10:53:16,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:16,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 10:53:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 10:53:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:53:17,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-09 10:53:17,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 113 transitions, 866 flow. Second operand has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:17,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:17,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-09 10:53:17,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:19,788 INFO L124 PetriNetUnfolderBase]: 6270/9905 cut-off events. [2024-11-09 10:53:19,789 INFO L125 PetriNetUnfolderBase]: For 65639/68676 co-relation queries the response was YES. [2024-11-09 10:53:19,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41813 conditions, 9905 events. 6270/9905 cut-off events. For 65639/68676 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 64310 event pairs, 1300 based on Foata normal form. 234/9793 useless extension candidates. Maximal degree in co-relation 41735. Up to 1380 conditions per place. [2024-11-09 10:53:19,857 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 305 selfloop transitions, 58 changer transitions 0/380 dead transitions. [2024-11-09 10:53:19,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 380 transitions, 3417 flow [2024-11-09 10:53:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 10:53:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-09 10:53:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1075 transitions. [2024-11-09 10:53:19,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6073446327683616 [2024-11-09 10:53:19,860 INFO L175 Difference]: Start difference. First operand has 147 places, 113 transitions, 866 flow. Second operand 30 states and 1075 transitions. [2024-11-09 10:53:19,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 380 transitions, 3417 flow [2024-11-09 10:53:19,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 380 transitions, 3267 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-09 10:53:19,888 INFO L231 Difference]: Finished difference. Result has 168 places, 119 transitions, 976 flow [2024-11-09 10:53:19,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=976, PETRI_PLACES=168, PETRI_TRANSITIONS=119} [2024-11-09 10:53:19,889 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 108 predicate places. [2024-11-09 10:53:19,889 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 119 transitions, 976 flow [2024-11-09 10:53:19,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:19,890 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:19,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 10:53:20,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:20,095 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:20,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash -957927774, now seen corresponding path program 2 times [2024-11-09 10:53:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:20,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691180604] [2024-11-09 10:53:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:20,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:53:20,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691180604] [2024-11-09 10:53:20,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691180604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525722971] [2024-11-09 10:53:20,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:53:20,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:20,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:20,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:53:20,557 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:53:20,557 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:53:20,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 10:53:20,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:20,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:53:20,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:53:20,678 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:53:20,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-09 10:53:20,703 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:53:20,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:53:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 10:53:21,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 10:53:22,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525722971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:22,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:22,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2024-11-09 10:53:22,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169380725] [2024-11-09 10:53:22,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:22,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:53:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:53:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:53:23,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-09 10:53:23,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 119 transitions, 976 flow. Second operand has 22 states, 22 states have (on average 25.40909090909091) internal successors, (559), 22 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:23,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:23,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-09 10:53:23,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:27,609 INFO L124 PetriNetUnfolderBase]: 9924/14449 cut-off events. [2024-11-09 10:53:27,609 INFO L125 PetriNetUnfolderBase]: For 52905/54806 co-relation queries the response was YES. [2024-11-09 10:53:27,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60643 conditions, 14449 events. 9924/14449 cut-off events. For 52905/54806 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 87071 event pairs, 2376 based on Foata normal form. 200/14389 useless extension candidates. Maximal degree in co-relation 60558. Up to 2524 conditions per place. [2024-11-09 10:53:27,783 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 343 selfloop transitions, 50 changer transitions 0/408 dead transitions. [2024-11-09 10:53:27,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 408 transitions, 3615 flow [2024-11-09 10:53:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 10:53:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 10:53:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 824 transitions. [2024-11-09 10:53:27,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5371577574967406 [2024-11-09 10:53:27,786 INFO L175 Difference]: Start difference. First operand has 168 places, 119 transitions, 976 flow. Second operand 26 states and 824 transitions. [2024-11-09 10:53:27,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 408 transitions, 3615 flow [2024-11-09 10:53:27,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 408 transitions, 3306 flow, removed 2 selfloop flow, removed 26 redundant places. [2024-11-09 10:53:27,895 INFO L231 Difference]: Finished difference. Result has 170 places, 132 transitions, 1095 flow [2024-11-09 10:53:27,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1095, PETRI_PLACES=170, PETRI_TRANSITIONS=132} [2024-11-09 10:53:27,896 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 110 predicate places. [2024-11-09 10:53:27,896 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 132 transitions, 1095 flow [2024-11-09 10:53:27,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 25.40909090909091) internal successors, (559), 22 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:27,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:27,897 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:27,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:28,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:28,097 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:28,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:28,098 INFO L85 PathProgramCache]: Analyzing trace with hash -535825138, now seen corresponding path program 1 times [2024-11-09 10:53:28,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:28,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178650784] [2024-11-09 10:53:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:28,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:53:28,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178650784] [2024-11-09 10:53:28,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178650784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501407243] [2024-11-09 10:53:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:28,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:28,172 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:28,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 10:53:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:28,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 10:53:28,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:53:28,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:53:28,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501407243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:28,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:28,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-09 10:53:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182295907] [2024-11-09 10:53:28,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:28,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:53:28,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:53:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:53:28,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:53:28,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 132 transitions, 1095 flow. Second operand has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:28,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:28,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:53:28,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:29,751 INFO L124 PetriNetUnfolderBase]: 6536/10686 cut-off events. [2024-11-09 10:53:29,751 INFO L125 PetriNetUnfolderBase]: For 65241/68359 co-relation queries the response was YES. [2024-11-09 10:53:29,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43787 conditions, 10686 events. 6536/10686 cut-off events. For 65241/68359 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 73095 event pairs, 1908 based on Foata normal form. 390/10700 useless extension candidates. Maximal degree in co-relation 43707. Up to 4995 conditions per place. [2024-11-09 10:53:29,904 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 119 selfloop transitions, 21 changer transitions 0/163 dead transitions. [2024-11-09 10:53:29,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 163 transitions, 1675 flow [2024-11-09 10:53:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-09 10:53:29,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6483050847457628 [2024-11-09 10:53:29,905 INFO L175 Difference]: Start difference. First operand has 170 places, 132 transitions, 1095 flow. Second operand 4 states and 153 transitions. [2024-11-09 10:53:29,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 163 transitions, 1675 flow [2024-11-09 10:53:29,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 163 transitions, 1523 flow, removed 7 selfloop flow, removed 16 redundant places. [2024-11-09 10:53:29,958 INFO L231 Difference]: Finished difference. Result has 156 places, 129 transitions, 997 flow [2024-11-09 10:53:29,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=997, PETRI_PLACES=156, PETRI_TRANSITIONS=129} [2024-11-09 10:53:29,959 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2024-11-09 10:53:29,959 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 129 transitions, 997 flow [2024-11-09 10:53:29,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:29,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:29,960 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:29,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:30,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 10:53:30,160 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:30,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 227059497, now seen corresponding path program 1 times [2024-11-09 10:53:30,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:30,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051671837] [2024-11-09 10:53:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:30,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:53:30,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:30,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051671837] [2024-11-09 10:53:30,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051671837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:30,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737960618] [2024-11-09 10:53:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:30,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:30,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:30,346 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:30,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 10:53:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:30,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:53:30,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:53:30,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:53:30,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737960618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:30,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:30,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-09 10:53:30,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555590912] [2024-11-09 10:53:30,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:30,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:53:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:53:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:53:30,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-09 10:53:30,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 129 transitions, 997 flow. Second operand has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:30,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:30,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-09 10:53:30,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:31,789 INFO L124 PetriNetUnfolderBase]: 5142/8632 cut-off events. [2024-11-09 10:53:31,790 INFO L125 PetriNetUnfolderBase]: For 39693/40623 co-relation queries the response was YES. [2024-11-09 10:53:31,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35233 conditions, 8632 events. 5142/8632 cut-off events. For 39693/40623 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 58063 event pairs, 2488 based on Foata normal form. 355/8837 useless extension candidates. Maximal degree in co-relation 35158. Up to 3576 conditions per place. [2024-11-09 10:53:31,857 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 138 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-11-09 10:53:31,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 1883 flow [2024-11-09 10:53:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:53:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:53:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 432 transitions. [2024-11-09 10:53:31,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-09 10:53:31,859 INFO L175 Difference]: Start difference. First operand has 156 places, 129 transitions, 997 flow. Second operand 12 states and 432 transitions. [2024-11-09 10:53:31,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 1883 flow [2024-11-09 10:53:31,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 202 transitions, 1813 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:53:31,888 INFO L231 Difference]: Finished difference. Result has 167 places, 133 transitions, 1078 flow [2024-11-09 10:53:31,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1078, PETRI_PLACES=167, PETRI_TRANSITIONS=133} [2024-11-09 10:53:31,888 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 107 predicate places. [2024-11-09 10:53:31,888 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 133 transitions, 1078 flow [2024-11-09 10:53:31,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:31,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:31,889 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:31,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:32,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 10:53:32,090 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:32,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1616142578, now seen corresponding path program 2 times [2024-11-09 10:53:32,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:32,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025023776] [2024-11-09 10:53:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:32,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:53:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025023776] [2024-11-09 10:53:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025023776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218079942] [2024-11-09 10:53:32,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:53:32,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:32,271 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:32,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 10:53:32,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:53:32,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:53:32,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 10:53:32,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:32,408 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 [2024-11-09 10:53:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:53:33,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:53:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218079942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:33,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:33,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2024-11-09 10:53:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374986981] [2024-11-09 10:53:33,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:33,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:53:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:53:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:53:34,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-09 10:53:34,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 133 transitions, 1078 flow. Second operand has 21 states, 21 states have (on average 28.952380952380953) internal successors, (608), 21 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:34,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:34,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-09 10:53:34,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:36,828 INFO L124 PetriNetUnfolderBase]: 9039/13768 cut-off events. [2024-11-09 10:53:36,828 INFO L125 PetriNetUnfolderBase]: For 65333/66910 co-relation queries the response was YES. [2024-11-09 10:53:36,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59524 conditions, 13768 events. 9039/13768 cut-off events. For 65333/66910 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 88654 event pairs, 1137 based on Foata normal form. 598/14217 useless extension candidates. Maximal degree in co-relation 51290. Up to 2762 conditions per place. [2024-11-09 10:53:36,970 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 302 selfloop transitions, 59 changer transitions 0/388 dead transitions. [2024-11-09 10:53:36,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 388 transitions, 3744 flow [2024-11-09 10:53:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 10:53:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-09 10:53:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 771 transitions. [2024-11-09 10:53:36,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5939907550077042 [2024-11-09 10:53:36,972 INFO L175 Difference]: Start difference. First operand has 167 places, 133 transitions, 1078 flow. Second operand 22 states and 771 transitions. [2024-11-09 10:53:36,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 388 transitions, 3744 flow [2024-11-09 10:53:37,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 388 transitions, 3648 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-09 10:53:37,038 INFO L231 Difference]: Finished difference. Result has 179 places, 153 transitions, 1360 flow [2024-11-09 10:53:37,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1360, PETRI_PLACES=179, PETRI_TRANSITIONS=153} [2024-11-09 10:53:37,038 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 119 predicate places. [2024-11-09 10:53:37,039 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 153 transitions, 1360 flow [2024-11-09 10:53:37,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 28.952380952380953) internal successors, (608), 21 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:37,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:37,039 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] [2024-11-09 10:53:37,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:37,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:53:37,240 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-09 10:53:37,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1906435703, now seen corresponding path program 1 times [2024-11-09 10:53:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:37,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285915446] [2024-11-09 10:53:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:37,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285915446] [2024-11-09 10:53:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285915446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760103745] [2024-11-09 10:53:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:37,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:37,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:37,944 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:37,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 10:53:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:38,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 10:53:38,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:38,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:53:38,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-09 10:53:38,131 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:53:38,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:53:38,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:53:38,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 10:53:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:38,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:51,034 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-09 10:53:51,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1530 treesize of output 1100 [2024-11-09 10:53:51,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:53:51,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 694 treesize of output 642