./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:22:22,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:22:22,284 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:22:22,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:22:22,290 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:22:22,315 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:22:22,316 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:22:22,316 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:22:22,317 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:22:22,320 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:22:22,320 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:22:22,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:22:22,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:22:22,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:22:22,321 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:22:22,321 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:22:22,321 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:22:22,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:22:22,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:22:22,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:22:22,322 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:22:22,324 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:22:22,324 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:22:22,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:22:22,324 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:22:22,325 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:22:22,325 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:22:22,325 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:22:22,325 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:22:22,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:22:22,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:22:22,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:22:22,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:22:22,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:22:22,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:22:22,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:22:22,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:22:22,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:22:22,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:22:22,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:22:22,329 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:22:22,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:22:22,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-11-12 16:22:22,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:22:22,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:22:22,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:22:22,572 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:22:22,573 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:22:22,574 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-12 16:22:23,837 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:22:23,986 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:22:23,987 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-12 16:22:23,992 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddac1339c/ed84c223292c4a86b0cdc31927b3c55f/FLAG0c4d435c4 [2024-11-12 16:22:24,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddac1339c/ed84c223292c4a86b0cdc31927b3c55f [2024-11-12 16:22:24,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:22:24,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:22:24,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:22:24,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:22:24,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:22:24,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a15c531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24, skipping insertion in model container [2024-11-12 16:22:24,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:22:24,250 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:22:24,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:22:24,265 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:22:24,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:22:24,312 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:22:24,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24 WrapperNode [2024-11-12 16:22:24,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:22:24,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:22:24,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:22:24,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:22:24,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,355 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 269 [2024-11-12 16:22:24,355 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:22:24,356 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:22:24,356 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:22:24,356 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:22:24,370 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,373 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,387 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-12 16:22:24,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,398 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,406 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,410 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:22:24,410 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:22:24,410 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:22:24,411 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:22:24,411 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (1/1) ... [2024-11-12 16:22:24,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:22:24,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:24,441 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) [2024-11-12 16:22:24,444 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 [2024-11-12 16:22:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:22:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:22:24,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:22:24,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:22:24,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:22:24,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:22:24,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:22:24,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:22:24,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:22:24,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:22:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:22:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:22:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:22:24,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:22:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:22:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:22:24,479 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:22:24,571 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:22:24,573 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:22:24,895 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:22:24,895 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:22:25,179 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:22:25,179 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-12 16:22:25,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:22:25 BoogieIcfgContainer [2024-11-12 16:22:25,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:22:25,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:22:25,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:22:25,185 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:22:25,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:22:24" (1/3) ... [2024-11-12 16:22:25,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3fae0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:22:25, skipping insertion in model container [2024-11-12 16:22:25,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:22:24" (2/3) ... [2024-11-12 16:22:25,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3fae0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:22:25, skipping insertion in model container [2024-11-12 16:22:25,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:22:25" (3/3) ... [2024-11-12 16:22:25,188 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-11-12 16:22:25,202 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:22:25,202 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-12 16:22:25,203 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:22:25,262 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:22:25,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-12 16:22:25,317 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-12 16:22:25,318 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:22:25,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 150 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-12 16:22:25,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-12 16:22:25,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-12 16:22:25,330 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:22:25,338 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;@1c926a2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:22:25,338 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-12 16:22:25,341 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:22:25,341 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:22:25,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:22:25,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:25,342 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:22:25,342 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:25,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash 867015, now seen corresponding path program 1 times [2024-11-12 16:22:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:25,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872511366] [2024-11-12 16:22:25,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:25,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:25,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872511366] [2024-11-12 16:22:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872511366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:25,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:25,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:22:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174473877] [2024-11-12 16:22:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:25,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:22:25,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:22:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:22:25,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:25,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:25,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:25,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:25,732 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-11-12 16:22:25,732 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-12 16:22:25,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2067 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2024-11-12 16:22:25,738 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-12 16:22:25,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-11-12 16:22:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:22:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:22:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-12 16:22:25,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-12 16:22:25,748 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-11-12 16:22:25,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-11-12 16:22:25,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:25,752 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-12 16:22:25,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=51, PETRI_TRANSITIONS=51} [2024-11-12 16:22:25,756 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-12 16:22:25,756 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-12 16:22:25,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:25,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:25,756 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:22:25,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:22:25,757 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:25,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:25,757 INFO L85 PathProgramCache]: Analyzing trace with hash 867016, now seen corresponding path program 1 times [2024-11-12 16:22:25,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:25,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586947005] [2024-11-12 16:22:25,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:25,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:25,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:25,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586947005] [2024-11-12 16:22:25,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586947005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:25,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:25,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:22:25,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930165669] [2024-11-12 16:22:25,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:25,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:22:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:22:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:22:25,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:25,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-11-12 16:22:25,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:25,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:25,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:26,135 INFO L124 PetriNetUnfolderBase]: 202/449 cut-off events. [2024-11-12 16:22:26,135 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:22:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 449 events. 202/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2068 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 734. Up to 305 conditions per place. [2024-11-12 16:22:26,138 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-12 16:22:26,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2024-11-12 16:22:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:22:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:22:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-12 16:22:26,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-11-12 16:22:26,142 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-11-12 16:22:26,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2024-11-12 16:22:26,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:22:26,144 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2024-11-12 16:22:26,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-11-12 16:22:26,145 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-12 16:22:26,145 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2024-11-12 16:22:26,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-11-12 16:22:26,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:26,146 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:22:26,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:22:26,147 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:26,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash 833230439, now seen corresponding path program 1 times [2024-11-12 16:22:26,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:26,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158604697] [2024-11-12 16:22:26,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:26,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:26,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158604697] [2024-11-12 16:22:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158604697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:26,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196144832] [2024-11-12 16:22:26,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:26,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:26,375 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) [2024-11-12 16:22:26,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:22:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:26,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:22:26,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:26,488 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 [2024-11-12 16:22:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:26,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:26,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196144832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:26,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:26,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-12 16:22:26,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135899303] [2024-11-12 16:22:26,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:26,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 16:22:26,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 16:22:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:22:26,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:26,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2024-11-12 16:22:26,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:26,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:26,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:26,994 INFO L124 PetriNetUnfolderBase]: 211/476 cut-off events. [2024-11-12 16:22:26,994 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:22:26,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 476 events. 211/476 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2191 event pairs, 124 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 769. Up to 308 conditions per place. [2024-11-12 16:22:26,999 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2024-11-12 16:22:27,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 378 flow [2024-11-12 16:22:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:22:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:22:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-12 16:22:27,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-12 16:22:27,001 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2024-11-12 16:22:27,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 378 flow [2024-11-12 16:22:27,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:22:27,005 INFO L231 Difference]: Finished difference. Result has 59 places, 72 transitions, 313 flow [2024-11-12 16:22:27,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=59, PETRI_TRANSITIONS=72} [2024-11-12 16:22:27,006 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-12 16:22:27,007 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 72 transitions, 313 flow [2024-11-12 16:22:27,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2024-11-12 16:22:27,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:27,007 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-12 16:22:27,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:22:27,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:27,209 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:27,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash -431889724, now seen corresponding path program 2 times [2024-11-12 16:22:27,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:27,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780060754] [2024-11-12 16:22:27,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:27,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:27,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:27,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780060754] [2024-11-12 16:22:27,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780060754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:27,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169326997] [2024-11-12 16:22:27,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:22:27,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:27,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:27,520 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) [2024-11-12 16:22:27,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:22:27,583 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:22:27,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:27,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:22:27,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:27,591 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 [2024-11-12 16:22:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:27,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:27,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169326997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:27,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:27,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-12 16:22:27,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445655720] [2024-11-12 16:22:27,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:27,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:22:27,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:22:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:22:28,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:28,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 313 flow. Second operand has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 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) [2024-11-12 16:22:28,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:28,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:28,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:29,077 INFO L124 PetriNetUnfolderBase]: 214/485 cut-off events. [2024-11-12 16:22:29,078 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-12 16:22:29,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 485 events. 214/485 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2263 event pairs, 124 based on Foata normal form. 3/407 useless extension candidates. Maximal degree in co-relation 813. Up to 309 conditions per place. [2024-11-12 16:22:29,080 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 44 selfloop transitions, 30 changer transitions 0/93 dead transitions. [2024-11-12 16:22:29,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 527 flow [2024-11-12 16:22:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-11-12 16:22:29,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-12 16:22:29,082 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 313 flow. Second operand 7 states and 259 transitions. [2024-11-12 16:22:29,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 527 flow [2024-11-12 16:22:29,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 489 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-12 16:22:29,085 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 394 flow [2024-11-12 16:22:29,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2024-11-12 16:22:29,086 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-12 16:22:29,086 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 394 flow [2024-11-12 16:22:29,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 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) [2024-11-12 16:22:29,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:29,086 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-11-12 16:22:29,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:22:29,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-12 16:22:29,290 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:29,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1565831011, now seen corresponding path program 3 times [2024-11-12 16:22:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:29,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143473424] [2024-11-12 16:22:29,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:29,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143473424] [2024-11-12 16:22:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143473424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512917660] [2024-11-12 16:22:29,380 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:22:29,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:29,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:29,382 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) [2024-11-12 16:22:29,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:22:29,439 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:22:29,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:29,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:22:29,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:29,445 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 [2024-11-12 16:22:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-12 16:22:29,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-12 16:22:29,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512917660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:29,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-12 16:22:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060144066] [2024-11-12 16:22:29,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:29,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:22:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:22:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:22:29,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:29,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 394 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-11-12 16:22:29,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:29,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:29,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:30,189 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-11-12 16:22:30,189 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-12 16:22:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 473 events. 208/473 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2139 event pairs, 124 based on Foata normal form. 6/398 useless extension candidates. Maximal degree in co-relation 837. Up to 296 conditions per place. [2024-11-12 16:22:30,192 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 25 selfloop transitions, 37 changer transitions 0/81 dead transitions. [2024-11-12 16:22:30,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 459 flow [2024-11-12 16:22:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:22:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:22:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 354 transitions. [2024-11-12 16:22:30,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-12 16:22:30,193 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 394 flow. Second operand 11 states and 354 transitions. [2024-11-12 16:22:30,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 459 flow [2024-11-12 16:22:30,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 369 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-12 16:22:30,196 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 331 flow [2024-11-12 16:22:30,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2024-11-12 16:22:30,197 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-11-12 16:22:30,197 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 331 flow [2024-11-12 16:22:30,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-11-12 16:22:30,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:30,197 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:30,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:22:30,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:30,401 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:30,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:30,402 INFO L85 PathProgramCache]: Analyzing trace with hash -590761488, now seen corresponding path program 1 times [2024-11-12 16:22:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:30,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732086009] [2024-11-12 16:22:30,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:22:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:30,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732086009] [2024-11-12 16:22:30,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732086009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:30,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004056024] [2024-11-12 16:22:30,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:30,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:30,499 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) [2024-11-12 16:22:30,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:22:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:30,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:22:30,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:22:30,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:22:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004056024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:30,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-12 16:22:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656732837] [2024-11-12 16:22:30,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:30,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 16:22:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 16:22:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:22:30,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-12 16:22:30,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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) [2024-11-12 16:22:30,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:30,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-12 16:22:30,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:30,803 INFO L124 PetriNetUnfolderBase]: 199/464 cut-off events. [2024-11-12 16:22:30,804 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-12 16:22:30,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 464 events. 199/464 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2056 event pairs, 124 based on Foata normal form. 9/392 useless extension candidates. Maximal degree in co-relation 739. Up to 296 conditions per place. [2024-11-12 16:22:30,807 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 35 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-11-12 16:22:30,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 376 flow [2024-11-12 16:22:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 265 transitions. [2024-11-12 16:22:30,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-12 16:22:30,808 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 331 flow. Second operand 7 states and 265 transitions. [2024-11-12 16:22:30,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 376 flow [2024-11-12 16:22:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 322 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-12 16:22:30,810 INFO L231 Difference]: Finished difference. Result has 61 places, 72 transitions, 252 flow [2024-11-12 16:22:30,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=72} [2024-11-12 16:22:30,811 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-12 16:22:30,811 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 72 transitions, 252 flow [2024-11-12 16:22:30,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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) [2024-11-12 16:22:30,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:30,812 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:30,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:22:31,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:31,013 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:31,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash -929484259, now seen corresponding path program 2 times [2024-11-12 16:22:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:31,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759612549] [2024-11-12 16:22:31,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-12 16:22:31,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:31,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759612549] [2024-11-12 16:22:31,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759612549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:31,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:31,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:22:31,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911063805] [2024-11-12 16:22:31,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:31,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:31,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:31,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:31,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-12 16:22:31,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:31,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:31,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-12 16:22:31,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:31,344 INFO L124 PetriNetUnfolderBase]: 325/634 cut-off events. [2024-11-12 16:22:31,344 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-12 16:22:31,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 634 events. 325/634 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2770 event pairs, 221 based on Foata normal form. 0/587 useless extension candidates. Maximal degree in co-relation 1090. Up to 472 conditions per place. [2024-11-12 16:22:31,347 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-12 16:22:31,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 358 flow [2024-11-12 16:22:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-12 16:22:31,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-12 16:22:31,348 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 252 flow. Second operand 5 states and 143 transitions. [2024-11-12 16:22:31,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 358 flow [2024-11-12 16:22:31,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 322 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:31,350 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 218 flow [2024-11-12 16:22:31,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2024-11-12 16:22:31,351 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2024-11-12 16:22:31,351 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 218 flow [2024-11-12 16:22:31,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:31,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:31,351 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:31,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:22:31,351 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:31,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -929484258, now seen corresponding path program 1 times [2024-11-12 16:22:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:31,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224442947] [2024-11-12 16:22:31,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-12 16:22:31,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:31,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224442947] [2024-11-12 16:22:31,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224442947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:31,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344763582] [2024-11-12 16:22:31,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:31,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:31,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:31,855 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) [2024-11-12 16:22:31,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:22:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:31,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-12 16:22:31,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:31,957 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 [2024-11-12 16:22:31,960 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 [2024-11-12 16:22:32,031 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-12 16:22:32,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-12 16:22:32,040 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 14 treesize of output 9 [2024-11-12 16:22:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:32,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-12 16:22:32,373 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-12 16:22:32,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-12 16:22:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:32,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344763582] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:33,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:33,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 25 [2024-11-12 16:22:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40182169] [2024-11-12 16:22:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:33,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:22:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:22:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-12 16:22:33,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:33,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 218 flow. Second operand has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 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) [2024-11-12 16:22:33,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:33,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:33,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:34,226 INFO L124 PetriNetUnfolderBase]: 575/1059 cut-off events. [2024-11-12 16:22:34,226 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:22:34,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1059 events. 575/1059 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5215 event pairs, 221 based on Foata normal form. 0/951 useless extension candidates. Maximal degree in co-relation 1889. Up to 440 conditions per place. [2024-11-12 16:22:34,231 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 67 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2024-11-12 16:22:34,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 407 flow [2024-11-12 16:22:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-11-12 16:22:34,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-11-12 16:22:34,232 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 218 flow. Second operand 7 states and 233 transitions. [2024-11-12 16:22:34,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 407 flow [2024-11-12 16:22:34,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:22:34,234 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 240 flow [2024-11-12 16:22:34,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2024-11-12 16:22:34,236 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-12 16:22:34,236 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 240 flow [2024-11-12 16:22:34,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 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) [2024-11-12 16:22:34,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:34,236 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:34,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:34,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:34,437 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:34,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1250759900, now seen corresponding path program 1 times [2024-11-12 16:22:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815349368] [2024-11-12 16:22:34,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:34,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:34,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815349368] [2024-11-12 16:22:34,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815349368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:34,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191964867] [2024-11-12 16:22:34,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:34,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:34,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:34,797 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) [2024-11-12 16:22:34,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:22:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:34,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-12 16:22:34,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:34,902 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 [2024-11-12 16:22:34,907 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 [2024-11-12 16:22:34,969 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:22:34,969 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 14 treesize of output 13 [2024-11-12 16:22:34,978 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:34,979 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 [2024-11-12 16:22:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:35,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191964867] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:35,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-12 16:22:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011594227] [2024-11-12 16:22:35,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:35,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 16:22:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 16:22:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-12 16:22:35,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:22:35,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-11-12 16:22:35,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:35,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:22:35,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:35,925 INFO L124 PetriNetUnfolderBase]: 397/811 cut-off events. [2024-11-12 16:22:35,926 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-11-12 16:22:35,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 811 events. 397/811 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3976 event pairs, 169 based on Foata normal form. 26/761 useless extension candidates. Maximal degree in co-relation 1571. Up to 377 conditions per place. [2024-11-12 16:22:35,929 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 66 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2024-11-12 16:22:35,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 425 flow [2024-11-12 16:22:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:22:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:22:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-12 16:22:35,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-12 16:22:35,930 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 240 flow. Second operand 6 states and 216 transitions. [2024-11-12 16:22:35,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 425 flow [2024-11-12 16:22:35,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 88 transitions, 414 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:35,932 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 251 flow [2024-11-12 16:22:35,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2024-11-12 16:22:35,932 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-11-12 16:22:35,932 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 251 flow [2024-11-12 16:22:35,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-11-12 16:22:35,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:35,933 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:35,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:36,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:36,137 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:36,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1250759899, now seen corresponding path program 1 times [2024-11-12 16:22:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:36,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942996656] [2024-11-12 16:22:36,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-12 16:22:36,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:36,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942996656] [2024-11-12 16:22:36,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942996656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:36,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:36,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:22:36,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612107009] [2024-11-12 16:22:36,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:36,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:36,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:36,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:36,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:36,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-12 16:22:36,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-12 16:22:36,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:36,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-12 16:22:36,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:36,435 INFO L124 PetriNetUnfolderBase]: 445/917 cut-off events. [2024-11-12 16:22:36,435 INFO L125 PetriNetUnfolderBase]: For 539/594 co-relation queries the response was YES. [2024-11-12 16:22:36,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984 conditions, 917 events. 445/917 cut-off events. For 539/594 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4910 event pairs, 315 based on Foata normal form. 62/875 useless extension candidates. Maximal degree in co-relation 1872. Up to 650 conditions per place. [2024-11-12 16:22:36,439 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-12 16:22:36,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 357 flow [2024-11-12 16:22:36,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-12 16:22:36,440 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-12 16:22:36,440 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 251 flow. Second operand 5 states and 147 transitions. [2024-11-12 16:22:36,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 357 flow [2024-11-12 16:22:36,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 349 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:22:36,441 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 245 flow [2024-11-12 16:22:36,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2024-11-12 16:22:36,442 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-12 16:22:36,442 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 245 flow [2024-11-12 16:22:36,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-12 16:22:36,442 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:36,442 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:36,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:22:36,443 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:36,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 69792213, now seen corresponding path program 1 times [2024-11-12 16:22:36,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:36,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427261397] [2024-11-12 16:22:36,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:36,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427261397] [2024-11-12 16:22:36,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427261397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277540027] [2024-11-12 16:22:36,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:36,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:36,769 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) [2024-11-12 16:22:36,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:22:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:36,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-12 16:22:36,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:36,878 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 [2024-11-12 16:22:36,883 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 [2024-11-12 16:22:36,948 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:36,948 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 [2024-11-12 16:22:36,954 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 14 treesize of output 9 [2024-11-12 16:22:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:37,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:37,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277540027] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:37,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:37,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-12 16:22:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214405516] [2024-11-12 16:22:37,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:37,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 16:22:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:37,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 16:22:37,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-12 16:22:37,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-12 16:22:37,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 245 flow. Second operand has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 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) [2024-11-12 16:22:37,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:37,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-12 16:22:37,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:37,890 INFO L124 PetriNetUnfolderBase]: 772/1467 cut-off events. [2024-11-12 16:22:37,891 INFO L125 PetriNetUnfolderBase]: For 712/815 co-relation queries the response was YES. [2024-11-12 16:22:37,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3182 conditions, 1467 events. 772/1467 cut-off events. For 712/815 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8295 event pairs, 315 based on Foata normal form. 0/1278 useless extension candidates. Maximal degree in co-relation 3070. Up to 604 conditions per place. [2024-11-12 16:22:37,897 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 66 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-12 16:22:37,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 440 flow [2024-11-12 16:22:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:22:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:22:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-12 16:22:37,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-11-12 16:22:37,898 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 245 flow. Second operand 6 states and 209 transitions. [2024-11-12 16:22:37,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 440 flow [2024-11-12 16:22:37,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 435 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:22:37,900 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 265 flow [2024-11-12 16:22:37,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2024-11-12 16:22:37,901 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-12 16:22:37,901 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 265 flow [2024-11-12 16:22:37,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 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) [2024-11-12 16:22:37,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:37,901 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:37,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:22:38,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:38,102 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:38,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:38,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2131407859, now seen corresponding path program 1 times [2024-11-12 16:22:38,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:38,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632331810] [2024-11-12 16:22:38,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:38,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-12 16:22:38,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632331810] [2024-11-12 16:22:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632331810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:38,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:38,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:22:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813364711] [2024-11-12 16:22:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:38,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:22:38,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:22:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:22:38,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-12 16:22:38,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-11-12 16:22:38,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:38,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-12 16:22:38,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:38,313 INFO L124 PetriNetUnfolderBase]: 517/1052 cut-off events. [2024-11-12 16:22:38,313 INFO L125 PetriNetUnfolderBase]: For 751/853 co-relation queries the response was YES. [2024-11-12 16:22:38,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 1052 events. 517/1052 cut-off events. For 751/853 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5713 event pairs, 406 based on Foata normal form. 36/1012 useless extension candidates. Maximal degree in co-relation 2369. Up to 773 conditions per place. [2024-11-12 16:22:38,317 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 52 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-12 16:22:38,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 369 flow [2024-11-12 16:22:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:22:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:22:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-12 16:22:38,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-12 16:22:38,319 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 265 flow. Second operand 4 states and 127 transitions. [2024-11-12 16:22:38,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 369 flow [2024-11-12 16:22:38,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 361 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:22:38,320 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 257 flow [2024-11-12 16:22:38,320 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2024-11-12 16:22:38,322 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-12 16:22:38,323 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 257 flow [2024-11-12 16:22:38,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-11-12 16:22:38,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:38,323 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:38,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:22:38,323 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:38,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2131407858, now seen corresponding path program 1 times [2024-11-12 16:22:38,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:38,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507464644] [2024-11-12 16:22:38,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:38,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:38,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:38,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507464644] [2024-11-12 16:22:38,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507464644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:38,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226288410] [2024-11-12 16:22:38,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:38,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:38,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:38,573 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) [2024-11-12 16:22:38,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:22:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:38,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 16:22:38,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:39,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:39,120 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 [2024-11-12 16:22:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:39,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226288410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:39,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:39,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-12 16:22:39,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746209059] [2024-11-12 16:22:39,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:39,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 16:22:39,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 16:22:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-12 16:22:39,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:22:39,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 257 flow. Second operand has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 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) [2024-11-12 16:22:39,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:39,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:22:39,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:40,199 INFO L124 PetriNetUnfolderBase]: 885/1710 cut-off events. [2024-11-12 16:22:40,199 INFO L125 PetriNetUnfolderBase]: For 1030/1149 co-relation queries the response was YES. [2024-11-12 16:22:40,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 1710 events. 885/1710 cut-off events. For 1030/1149 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9824 event pairs, 315 based on Foata normal form. 92/1720 useless extension candidates. Maximal degree in co-relation 4021. Up to 650 conditions per place. [2024-11-12 16:22:40,208 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 68 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-11-12 16:22:40,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 539 flow [2024-11-12 16:22:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:22:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:22:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-12 16:22:40,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-12 16:22:40,210 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 257 flow. Second operand 10 states and 366 transitions. [2024-11-12 16:22:40,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 539 flow [2024-11-12 16:22:40,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:22:40,213 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 312 flow [2024-11-12 16:22:40,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-11-12 16:22:40,214 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-11-12 16:22:40,214 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 312 flow [2024-11-12 16:22:40,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 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) [2024-11-12 16:22:40,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:40,216 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:40,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:22:40,416 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 [2024-11-12 16:22:40,417 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:40,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash -610549791, now seen corresponding path program 1 times [2024-11-12 16:22:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:40,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849694263] [2024-11-12 16:22:40,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:40,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-12 16:22:41,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:41,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849694263] [2024-11-12 16:22:41,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849694263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:41,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287914791] [2024-11-12 16:22:41,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:41,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:41,175 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) [2024-11-12 16:22:41,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:22:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:41,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-12 16:22:41,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:41,308 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 [2024-11-12 16:22:41,313 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 [2024-11-12 16:22:41,379 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:41,380 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 [2024-11-12 16:22:41,389 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 14 treesize of output 9 [2024-11-12 16:22:41,447 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:22:41,447 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 14 treesize of output 13 [2024-11-12 16:22:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:41,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:42,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287914791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:42,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:42,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2024-11-12 16:22:42,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344871524] [2024-11-12 16:22:42,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:42,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-12 16:22:42,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:42,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-12 16:22:42,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2024-11-12 16:22:43,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-12 16:22:43,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 312 flow. Second operand has 35 states, 35 states have (on average 23.057142857142857) internal successors, (807), 35 states have internal predecessors, (807), 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) [2024-11-12 16:22:43,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:43,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-12 16:22:43,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:44,619 INFO L124 PetriNetUnfolderBase]: 2551/4454 cut-off events. [2024-11-12 16:22:44,620 INFO L125 PetriNetUnfolderBase]: For 4865/4991 co-relation queries the response was YES. [2024-11-12 16:22:44,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11977 conditions, 4454 events. 2551/4454 cut-off events. For 4865/4991 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 27233 event pairs, 433 based on Foata normal form. 174/4511 useless extension candidates. Maximal degree in co-relation 11845. Up to 861 conditions per place. [2024-11-12 16:22:44,643 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 131 selfloop transitions, 19 changer transitions 0/162 dead transitions. [2024-11-12 16:22:44,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 162 transitions, 960 flow [2024-11-12 16:22:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 16:22:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 16:22:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 532 transitions. [2024-11-12 16:22:44,647 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-12 16:22:44,647 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 312 flow. Second operand 19 states and 532 transitions. [2024-11-12 16:22:44,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 162 transitions, 960 flow [2024-11-12 16:22:44,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 162 transitions, 929 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:44,650 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 364 flow [2024-11-12 16:22:44,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=364, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2024-11-12 16:22:44,651 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2024-11-12 16:22:44,651 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 364 flow [2024-11-12 16:22:44,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 23.057142857142857) internal successors, (807), 35 states have internal predecessors, (807), 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) [2024-11-12 16:22:44,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:44,653 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:44,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:22:44,856 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,SelfDestructingSolverStorable13 [2024-11-12 16:22:44,857 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:44,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1681778331, now seen corresponding path program 1 times [2024-11-12 16:22:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:44,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443533584] [2024-11-12 16:22:44,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:44,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-12 16:22:45,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:45,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443533584] [2024-11-12 16:22:45,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443533584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:45,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913337056] [2024-11-12 16:22:45,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:45,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:45,519 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) [2024-11-12 16:22:45,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:22:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:45,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-12 16:22:45,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:45,646 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 [2024-11-12 16:22:45,648 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 [2024-11-12 16:22:45,714 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-12 16:22:45,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-12 16:22:45,718 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 14 treesize of output 9 [2024-11-12 16:22:45,820 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:22:45,820 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 14 treesize of output 13 [2024-11-12 16:22:45,834 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-12 16:22:45,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-12 16:22:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:46,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913337056] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:46,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:46,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 28 [2024-11-12 16:22:46,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903354765] [2024-11-12 16:22:46,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:46,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:22:46,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:22:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2024-11-12 16:22:46,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:46,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 364 flow. Second operand has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 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) [2024-11-12 16:22:46,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:46,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:46,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:47,858 INFO L124 PetriNetUnfolderBase]: 4996/8536 cut-off events. [2024-11-12 16:22:47,858 INFO L125 PetriNetUnfolderBase]: For 15581/16050 co-relation queries the response was YES. [2024-11-12 16:22:47,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24564 conditions, 8536 events. 4996/8536 cut-off events. For 15581/16050 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 59269 event pairs, 2535 based on Foata normal form. 0/8222 useless extension candidates. Maximal degree in co-relation 24431. Up to 4170 conditions per place. [2024-11-12 16:22:47,914 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 79 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-11-12 16:22:47,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 671 flow [2024-11-12 16:22:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-12 16:22:47,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-11-12 16:22:47,917 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 364 flow. Second operand 7 states and 229 transitions. [2024-11-12 16:22:47,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 671 flow [2024-11-12 16:22:47,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 664 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:22:47,925 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 386 flow [2024-11-12 16:22:47,925 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2024-11-12 16:22:47,925 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-12 16:22:47,925 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 386 flow [2024-11-12 16:22:47,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 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) [2024-11-12 16:22:47,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:47,926 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:47,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 16:22:48,129 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,SelfDestructingSolverStorable14 [2024-11-12 16:22:48,129 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:48,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:48,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1747173511, now seen corresponding path program 1 times [2024-11-12 16:22:48,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:48,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87969615] [2024-11-12 16:22:48,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:48,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-12 16:22:48,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:48,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87969615] [2024-11-12 16:22:48,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87969615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:48,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32015187] [2024-11-12 16:22:48,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:48,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:48,399 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) [2024-11-12 16:22:48,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:22:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:48,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-12 16:22:48,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:48,551 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 [2024-11-12 16:22:48,554 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 [2024-11-12 16:22:48,664 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:22:48,665 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 14 treesize of output 13 [2024-11-12 16:22:48,677 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:48,677 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 [2024-11-12 16:22:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:48,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:49,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32015187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:49,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:49,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-11-12 16:22:49,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683101374] [2024-11-12 16:22:49,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:49,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 16:22:49,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 16:22:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-12 16:22:50,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-12 16:22:50,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 386 flow. Second operand has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 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) [2024-11-12 16:22:50,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:50,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-12 16:22:50,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:51,144 INFO L124 PetriNetUnfolderBase]: 2886/5394 cut-off events. [2024-11-12 16:22:51,144 INFO L125 PetriNetUnfolderBase]: For 10074/10408 co-relation queries the response was YES. [2024-11-12 16:22:51,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16612 conditions, 5394 events. 2886/5394 cut-off events. For 10074/10408 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 37460 event pairs, 626 based on Foata normal form. 258/5538 useless extension candidates. Maximal degree in co-relation 16474. Up to 1299 conditions per place. [2024-11-12 16:22:51,175 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 120 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2024-11-12 16:22:51,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 148 transitions, 942 flow [2024-11-12 16:22:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:22:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:22:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 434 transitions. [2024-11-12 16:22:51,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5564102564102564 [2024-11-12 16:22:51,178 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 386 flow. Second operand 13 states and 434 transitions. [2024-11-12 16:22:51,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 148 transitions, 942 flow [2024-11-12 16:22:51,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 148 transitions, 918 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:51,190 INFO L231 Difference]: Finished difference. Result has 102 places, 76 transitions, 406 flow [2024-11-12 16:22:51,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=406, PETRI_PLACES=102, PETRI_TRANSITIONS=76} [2024-11-12 16:22:51,191 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 42 predicate places. [2024-11-12 16:22:51,191 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 76 transitions, 406 flow [2024-11-12 16:22:51,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 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) [2024-11-12 16:22:51,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:51,192 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:51,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 16:22:51,395 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,SelfDestructingSolverStorable15 [2024-11-12 16:22:51,396 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:51,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -595519865, now seen corresponding path program 1 times [2024-11-12 16:22:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865215204] [2024-11-12 16:22:51,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:51,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:51,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865215204] [2024-11-12 16:22:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865215204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099690817] [2024-11-12 16:22:51,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:51,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:51,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:51,688 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) [2024-11-12 16:22:51,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:22:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:51,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 16:22:51,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:51,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:51,983 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 [2024-11-12 16:22:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099690817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:52,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:52,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-12 16:22:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569973109] [2024-11-12 16:22:52,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:52,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 16:22:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:52,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 16:22:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-12 16:22:52,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:22:52,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 76 transitions, 406 flow. Second operand has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 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) [2024-11-12 16:22:52,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:52,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:22:52,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:53,539 INFO L124 PetriNetUnfolderBase]: 4091/7772 cut-off events. [2024-11-12 16:22:53,539 INFO L125 PetriNetUnfolderBase]: For 16807/17356 co-relation queries the response was YES. [2024-11-12 16:22:53,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23561 conditions, 7772 events. 4091/7772 cut-off events. For 16807/17356 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 59223 event pairs, 1805 based on Foata normal form. 408/8029 useless extension candidates. Maximal degree in co-relation 23416. Up to 3234 conditions per place. [2024-11-12 16:22:53,583 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 79 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-11-12 16:22:53,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 856 flow [2024-11-12 16:22:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:22:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:22:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2024-11-12 16:22:53,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-11-12 16:22:53,588 INFO L175 Difference]: Start difference. First operand has 102 places, 76 transitions, 406 flow. Second operand 10 states and 362 transitions. [2024-11-12 16:22:53,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 856 flow [2024-11-12 16:22:53,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 114 transitions, 812 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-12 16:22:53,600 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 440 flow [2024-11-12 16:22:53,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=440, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2024-11-12 16:22:53,600 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 41 predicate places. [2024-11-12 16:22:53,601 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 440 flow [2024-11-12 16:22:53,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 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) [2024-11-12 16:22:53,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:53,601 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:53,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 16:22:53,802 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,SelfDestructingSolverStorable16 [2024-11-12 16:22:53,802 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:53,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash 416478131, now seen corresponding path program 1 times [2024-11-12 16:22:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:53,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376105588] [2024-11-12 16:22:53,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:53,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:54,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:54,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376105588] [2024-11-12 16:22:54,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376105588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:54,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814487125] [2024-11-12 16:22:54,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:54,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:54,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:54,115 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) [2024-11-12 16:22:54,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:22:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:54,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-12 16:22:54,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:54,250 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 [2024-11-12 16:22:54,252 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 [2024-11-12 16:22:54,302 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:54,303 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 [2024-11-12 16:22:54,311 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 14 treesize of output 9 [2024-11-12 16:22:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:54,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:54,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814487125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:54,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:54,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-12 16:22:54,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139150423] [2024-11-12 16:22:54,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:54,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-12 16:22:54,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-12 16:22:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-12 16:22:55,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-12 16:22:55,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 78 transitions, 440 flow. Second operand has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 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) [2024-11-12 16:22:55,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:55,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-12 16:22:55,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:57,515 INFO L124 PetriNetUnfolderBase]: 8182/13920 cut-off events. [2024-11-12 16:22:57,515 INFO L125 PetriNetUnfolderBase]: For 30598/31659 co-relation queries the response was YES. [2024-11-12 16:22:57,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44768 conditions, 13920 events. 8182/13920 cut-off events. For 30598/31659 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 102111 event pairs, 1664 based on Foata normal form. 633/14329 useless extension candidates. Maximal degree in co-relation 44612. Up to 2775 conditions per place. [2024-11-12 16:22:57,609 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 126 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2024-11-12 16:22:57,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 162 transitions, 1226 flow [2024-11-12 16:22:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 16:22:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 16:22:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 478 transitions. [2024-11-12 16:22:57,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46862745098039216 [2024-11-12 16:22:57,612 INFO L175 Difference]: Start difference. First operand has 101 places, 78 transitions, 440 flow. Second operand 17 states and 478 transitions. [2024-11-12 16:22:57,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 162 transitions, 1226 flow [2024-11-12 16:22:57,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1195 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:57,650 INFO L231 Difference]: Finished difference. Result has 115 places, 80 transitions, 484 flow [2024-11-12 16:22:57,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=484, PETRI_PLACES=115, PETRI_TRANSITIONS=80} [2024-11-12 16:22:57,650 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-11-12 16:22:57,650 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 80 transitions, 484 flow [2024-11-12 16:22:57,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 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) [2024-11-12 16:22:57,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:57,651 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:57,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:57,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:22:57,856 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:22:57,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1063910132, now seen corresponding path program 1 times [2024-11-12 16:22:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994642060] [2024-11-12 16:22:57,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-12 16:22:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:58,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994642060] [2024-11-12 16:22:58,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994642060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:58,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011848106] [2024-11-12 16:22:58,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:58,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:58,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:58,613 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) [2024-11-12 16:22:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:22:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:58,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-12 16:22:58,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:58,765 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 [2024-11-12 16:22:58,814 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-12 16:22:58,814 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 12 treesize of output 14 [2024-11-12 16:22:59,003 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-12 16:22:59,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-12 16:22:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:59,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:22:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011848106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:59,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:59,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2024-11-12 16:22:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241844931] [2024-11-12 16:22:59,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:59,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-12 16:22:59,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-12 16:22:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=757, Unknown=0, NotChecked=0, Total=1056 [2024-11-12 16:23:00,871 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-12 16:23:00,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 80 transitions, 484 flow. Second operand has 33 states, 33 states have (on average 23.545454545454547) internal successors, (777), 33 states have internal predecessors, (777), 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) [2024-11-12 16:23:00,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:00,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-12 16:23:00,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:03,631 INFO L124 PetriNetUnfolderBase]: 11915/20202 cut-off events. [2024-11-12 16:23:03,632 INFO L125 PetriNetUnfolderBase]: For 60556/62464 co-relation queries the response was YES. [2024-11-12 16:23:03,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67951 conditions, 20202 events. 11915/20202 cut-off events. For 60556/62464 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 155835 event pairs, 2903 based on Foata normal form. 966/21065 useless extension candidates. Maximal degree in co-relation 67790. Up to 4618 conditions per place. [2024-11-12 16:23:03,769 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 120 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-11-12 16:23:03,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1344 flow [2024-11-12 16:23:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 16:23:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 16:23:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 512 transitions. [2024-11-12 16:23:03,770 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44912280701754387 [2024-11-12 16:23:03,770 INFO L175 Difference]: Start difference. First operand has 115 places, 80 transitions, 484 flow. Second operand 19 states and 512 transitions. [2024-11-12 16:23:03,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1344 flow [2024-11-12 16:23:03,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1282 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-12 16:23:03,814 INFO L231 Difference]: Finished difference. Result has 128 places, 82 transitions, 543 flow [2024-11-12 16:23:03,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=543, PETRI_PLACES=128, PETRI_TRANSITIONS=82} [2024-11-12 16:23:03,815 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2024-11-12 16:23:03,815 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 82 transitions, 543 flow [2024-11-12 16:23:03,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 23.545454545454547) internal successors, (777), 33 states have internal predecessors, (777), 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) [2024-11-12 16:23:03,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:03,816 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:03,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 16:23:04,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:04,020 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:23:04,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash -880449330, now seen corresponding path program 1 times [2024-11-12 16:23:04,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:04,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302922250] [2024-11-12 16:23:04,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:04,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:04,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302922250] [2024-11-12 16:23:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302922250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923043686] [2024-11-12 16:23:04,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:04,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:04,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:04,324 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) [2024-11-12 16:23:04,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 16:23:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:04,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-12 16:23:04,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:04,460 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 [2024-11-12 16:23:04,570 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:23:04,570 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 14 treesize of output 13 [2024-11-12 16:23:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:04,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-12 16:23:04,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923043686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:04,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:04,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 6] total 24 [2024-11-12 16:23:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441212720] [2024-11-12 16:23:04,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:04,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 16:23:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:04,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 16:23:04,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-12 16:23:05,704 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-12 16:23:05,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 82 transitions, 543 flow. Second operand has 25 states, 25 states have (on average 27.12) internal successors, (678), 25 states have internal predecessors, (678), 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) [2024-11-12 16:23:05,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:05,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-12 16:23:05,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:08,897 INFO L124 PetriNetUnfolderBase]: 10637/20297 cut-off events. [2024-11-12 16:23:08,897 INFO L125 PetriNetUnfolderBase]: For 63144/64652 co-relation queries the response was YES. [2024-11-12 16:23:08,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70621 conditions, 20297 events. 10637/20297 cut-off events. For 63144/64652 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 176107 event pairs, 2584 based on Foata normal form. 957/20944 useless extension candidates. Maximal degree in co-relation 70443. Up to 4405 conditions per place. [2024-11-12 16:23:09,051 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 149 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-11-12 16:23:09,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 1613 flow [2024-11-12 16:23:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:23:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:23:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 457 transitions. [2024-11-12 16:23:09,053 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5858974358974359 [2024-11-12 16:23:09,053 INFO L175 Difference]: Start difference. First operand has 128 places, 82 transitions, 543 flow. Second operand 13 states and 457 transitions. [2024-11-12 16:23:09,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 1613 flow [2024-11-12 16:23:09,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1509 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-12 16:23:09,146 INFO L231 Difference]: Finished difference. Result has 129 places, 84 transitions, 565 flow [2024-11-12 16:23:09,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=565, PETRI_PLACES=129, PETRI_TRANSITIONS=84} [2024-11-12 16:23:09,147 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2024-11-12 16:23:09,147 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 84 transitions, 565 flow [2024-11-12 16:23:09,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 27.12) internal successors, (678), 25 states have internal predecessors, (678), 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) [2024-11-12 16:23:09,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:09,147 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:09,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-12 16:23:09,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:09,352 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:23:09,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -834510873, now seen corresponding path program 1 times [2024-11-12 16:23:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805391043] [2024-11-12 16:23:09,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:09,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805391043] [2024-11-12 16:23:09,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805391043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345720805] [2024-11-12 16:23:09,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:09,929 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) [2024-11-12 16:23:09,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 16:23:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:10,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 16:23:10,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:10,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:10,584 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 [2024-11-12 16:23:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:10,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345720805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:10,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:10,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-12 16:23:10,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379080216] [2024-11-12 16:23:10,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:10,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-12 16:23:10,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-12 16:23:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-12 16:23:11,669 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:23:11,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 84 transitions, 565 flow. Second operand has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 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) [2024-11-12 16:23:11,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:11,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:23:11,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:15,824 INFO L124 PetriNetUnfolderBase]: 12845/24464 cut-off events. [2024-11-12 16:23:15,824 INFO L125 PetriNetUnfolderBase]: For 86398/88246 co-relation queries the response was YES. [2024-11-12 16:23:15,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88373 conditions, 24464 events. 12845/24464 cut-off events. For 86398/88246 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 215361 event pairs, 3452 based on Foata normal form. 1143/25330 useless extension candidates. Maximal degree in co-relation 88198. Up to 5988 conditions per place. [2024-11-12 16:23:16,032 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 151 selfloop transitions, 22 changer transitions 0/191 dead transitions. [2024-11-12 16:23:16,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 191 transitions, 1754 flow [2024-11-12 16:23:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:23:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:23:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2024-11-12 16:23:16,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-11-12 16:23:16,033 INFO L175 Difference]: Start difference. First operand has 129 places, 84 transitions, 565 flow. Second operand 13 states and 486 transitions. [2024-11-12 16:23:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 191 transitions, 1754 flow [2024-11-12 16:23:16,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 1687 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-12 16:23:16,171 INFO L231 Difference]: Finished difference. Result has 135 places, 86 transitions, 604 flow [2024-11-12 16:23:16,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=604, PETRI_PLACES=135, PETRI_TRANSITIONS=86} [2024-11-12 16:23:16,171 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2024-11-12 16:23:16,172 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 86 transitions, 604 flow [2024-11-12 16:23:16,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 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) [2024-11-12 16:23:16,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:16,172 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:16,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-12 16:23:16,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:16,373 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:23:16,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash 734782558, now seen corresponding path program 2 times [2024-11-12 16:23:16,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:16,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446038201] [2024-11-12 16:23:16,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:16,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-12 16:23:17,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:17,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446038201] [2024-11-12 16:23:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446038201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:17,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299848409] [2024-11-12 16:23:17,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:23:17,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:17,049 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) [2024-11-12 16:23:17,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 16:23:17,191 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:23:17,191 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:23:17,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-12 16:23:17,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:17,199 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 [2024-11-12 16:23:17,326 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-12 16:23:17,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-12 16:23:17,333 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 14 treesize of output 9 [2024-11-12 16:23:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:23:17,589 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:23:17,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2024-11-12 16:23:17,596 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:23:17,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:23:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-12 16:23:17,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:18,683 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 161 treesize of output 155 [2024-11-12 16:23:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-12 16:23:20,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299848409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:20,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:20,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 46 [2024-11-12 16:23:20,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615645092] [2024-11-12 16:23:20,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:20,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-12 16:23:20,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-12 16:23:20,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1885, Unknown=0, NotChecked=0, Total=2256 [2024-11-12 16:23:23,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-11-12 16:23:23,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 86 transitions, 604 flow. Second operand has 48 states, 48 states have (on average 20.0) internal successors, (960), 48 states have internal predecessors, (960), 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) [2024-11-12 16:23:23,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:23,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-11-12 16:23:23,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:31,922 INFO L124 PetriNetUnfolderBase]: 29429/48532 cut-off events. [2024-11-12 16:23:31,923 INFO L125 PetriNetUnfolderBase]: For 203798/207539 co-relation queries the response was YES. [2024-11-12 16:23:32,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189060 conditions, 48532 events. 29429/48532 cut-off events. For 203798/207539 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 398789 event pairs, 5611 based on Foata normal form. 522/48869 useless extension candidates. Maximal degree in co-relation 188881. Up to 8287 conditions per place. [2024-11-12 16:23:32,379 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 223 selfloop transitions, 24 changer transitions 0/259 dead transitions. [2024-11-12 16:23:32,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 259 transitions, 2395 flow [2024-11-12 16:23:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 16:23:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 16:23:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 506 transitions. [2024-11-12 16:23:32,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.443859649122807 [2024-11-12 16:23:32,381 INFO L175 Difference]: Start difference. First operand has 135 places, 86 transitions, 604 flow. Second operand 19 states and 506 transitions. [2024-11-12 16:23:32,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 259 transitions, 2395 flow [2024-11-12 16:23:32,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 259 transitions, 2322 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-12 16:23:32,718 INFO L231 Difference]: Finished difference. Result has 146 places, 88 transitions, 644 flow [2024-11-12 16:23:32,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=644, PETRI_PLACES=146, PETRI_TRANSITIONS=88} [2024-11-12 16:23:32,719 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 86 predicate places. [2024-11-12 16:23:32,719 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 88 transitions, 644 flow [2024-11-12 16:23:32,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 20.0) internal successors, (960), 48 states have internal predecessors, (960), 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) [2024-11-12 16:23:32,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:32,720 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:32,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-12 16:23:32,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:32,920 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:23:32,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:32,921 INFO L85 PathProgramCache]: Analyzing trace with hash 824355742, now seen corresponding path program 1 times [2024-11-12 16:23:32,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:32,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085749690] [2024-11-12 16:23:32,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:32,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-12 16:23:33,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:33,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085749690] [2024-11-12 16:23:33,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085749690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:33,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:33,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:23:33,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503704597] [2024-11-12 16:23:33,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:33,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:23:33,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:23:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:23:33,289 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-12 16:23:33,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 88 transitions, 644 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-11-12 16:23:33,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:33,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-12 16:23:33,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:37,029 INFO L124 PetriNetUnfolderBase]: 14184/24555 cut-off events. [2024-11-12 16:23:37,029 INFO L125 PetriNetUnfolderBase]: For 106379/108968 co-relation queries the response was YES. [2024-11-12 16:23:37,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96681 conditions, 24555 events. 14184/24555 cut-off events. For 106379/108968 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 199291 event pairs, 10966 based on Foata normal form. 36/23182 useless extension candidates. Maximal degree in co-relation 96499. Up to 17841 conditions per place. [2024-11-12 16:23:37,238 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 86 selfloop transitions, 2 changer transitions 1/109 dead transitions. [2024-11-12 16:23:37,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 109 transitions, 1008 flow [2024-11-12 16:23:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:23:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:23:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-12 16:23:37,240 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-11-12 16:23:37,240 INFO L175 Difference]: Start difference. First operand has 146 places, 88 transitions, 644 flow. Second operand 3 states and 129 transitions. [2024-11-12 16:23:37,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 109 transitions, 1008 flow [2024-11-12 16:23:37,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 109 transitions, 961 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-11-12 16:23:37,438 INFO L231 Difference]: Finished difference. Result has 134 places, 88 transitions, 613 flow [2024-11-12 16:23:37,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=613, PETRI_PLACES=134, PETRI_TRANSITIONS=88} [2024-11-12 16:23:37,438 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2024-11-12 16:23:37,438 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 88 transitions, 613 flow [2024-11-12 16:23:37,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-11-12 16:23:37,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:37,439 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:37,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-12 16:23:37,439 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:23:37,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1303423644, now seen corresponding path program 2 times [2024-11-12 16:23:37,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:37,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202295926] [2024-11-12 16:23:37,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:37,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:38,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202295926] [2024-11-12 16:23:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202295926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258793152] [2024-11-12 16:23:38,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:23:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:38,211 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) [2024-11-12 16:23:38,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 16:23:38,330 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:23:38,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:23:38,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-12 16:23:38,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:38,336 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 [2024-11-12 16:23:38,339 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 [2024-11-12 16:23:38,400 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-12 16:23:38,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-12 16:23:38,408 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 12 treesize of output 14 [2024-11-12 16:23:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:23:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:23:38,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2024-11-12 16:23:38,549 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-12 16:23:38,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-12 16:23:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-12 16:23:38,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-12 16:23:39,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258793152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:39,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:39,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 21 [2024-11-12 16:23:39,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862206166] [2024-11-12 16:23:39,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:39,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:23:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:23:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:23:41,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-12 16:23:41,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 88 transitions, 613 flow. Second operand has 22 states, 22 states have (on average 21.818181818181817) internal successors, (480), 22 states have internal predecessors, (480), 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) [2024-11-12 16:23:41,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:41,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-12 16:23:41,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:47,274 INFO L124 PetriNetUnfolderBase]: 19578/32602 cut-off events. [2024-11-12 16:23:47,274 INFO L125 PetriNetUnfolderBase]: For 139758/142056 co-relation queries the response was YES. [2024-11-12 16:23:47,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129237 conditions, 32602 events. 19578/32602 cut-off events. For 139758/142056 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 259398 event pairs, 2840 based on Foata normal form. 732/32803 useless extension candidates. Maximal degree in co-relation 129069. Up to 4526 conditions per place. [2024-11-12 16:23:47,657 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 201 selfloop transitions, 24 changer transitions 0/240 dead transitions. [2024-11-12 16:23:47,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 240 transitions, 2222 flow [2024-11-12 16:23:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-12 16:23:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-12 16:23:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 613 transitions. [2024-11-12 16:23:47,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42569444444444443 [2024-11-12 16:23:47,667 INFO L175 Difference]: Start difference. First operand has 134 places, 88 transitions, 613 flow. Second operand 24 states and 613 transitions. [2024-11-12 16:23:47,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 240 transitions, 2222 flow [2024-11-12 16:23:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 240 transitions, 2182 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-12 16:23:47,916 INFO L231 Difference]: Finished difference. Result has 150 places, 87 transitions, 635 flow [2024-11-12 16:23:47,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=635, PETRI_PLACES=150, PETRI_TRANSITIONS=87} [2024-11-12 16:23:47,917 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2024-11-12 16:23:47,917 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 87 transitions, 635 flow [2024-11-12 16:23:47,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 21.818181818181817) internal successors, (480), 22 states have internal predecessors, (480), 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) [2024-11-12 16:23:47,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:47,918 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:47,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 16:23:48,121 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 [2024-11-12 16:23:48,122 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:23:48,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:48,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1417275307, now seen corresponding path program 2 times [2024-11-12 16:23:48,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:48,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375376642] [2024-11-12 16:23:48,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:48,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:49,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:49,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375376642] [2024-11-12 16:23:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375376642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:49,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293180711] [2024-11-12 16:23:49,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:23:49,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:49,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:49,137 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) [2024-11-12 16:23:49,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 16:23:49,288 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:23:49,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:23:49,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-12 16:23:49,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:49,296 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 [2024-11-12 16:23:49,414 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:23:49,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-12 16:23:49,424 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:23:49,424 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 [2024-11-12 16:23:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:49,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:49,836 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 52 treesize of output 48 [2024-11-12 16:23:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-12 16:23:50,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293180711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:50,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:50,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2024-11-12 16:23:50,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514937590] [2024-11-12 16:23:50,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:50,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-12 16:23:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-12 16:23:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482