./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-2.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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:55:32,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:55:32,922 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:55:32,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:55:32,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:55:32,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:55:32,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:55:32,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:55:32,955 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:55:32,959 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:55:32,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:55:32,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:55:32,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:55:32,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:55:32,960 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:55:32,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:55:32,961 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:55:32,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:55:32,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:55:32,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:55:32,962 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:55:32,964 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:55:32,964 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:55:32,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:55:32,965 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:55:32,965 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:55:32,965 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:55:32,966 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:55:32,966 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:55:32,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:55:32,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:55:32,968 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:55:32,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:55:32,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:55:32,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:55:32,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:55:32,969 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:55:32,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:55:32,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:55:32,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:55:32,970 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:55:32,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:55:32,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-11-09 10:55:33,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:55:33,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:55:33,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:55:33,262 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:55:33,262 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:55:33,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-09 10:55:34,808 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:55:35,010 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:55:35,011 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-09 10:55:35,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667b81d8f/bac78b99509948ca9bffbd24f24ce09b/FLAG02260c4b3 [2024-11-09 10:55:35,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667b81d8f/bac78b99509948ca9bffbd24f24ce09b [2024-11-09 10:55:35,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:55:35,042 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:55:35,043 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:55:35,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:55:35,050 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:55:35,051 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,052 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691ecdd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35, skipping insertion in model container [2024-11-09 10:55:35,052 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,077 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:55:35,318 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:55:35,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:55:35,344 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:55:35,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:55:35,388 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:55:35,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35 WrapperNode [2024-11-09 10:55:35,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:55:35,390 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:55:35,390 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:55:35,390 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:55:35,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,439 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 151 [2024-11-09 10:55:35,439 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:55:35,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:55:35,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:55:35,442 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:55:35,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,455 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,469 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 10:55:35,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:55:35,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:55:35,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:55:35,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:55:35,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:55:35,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:35,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:55:35,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:55:35,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:55:35,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:55:35,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:55:35,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:55:35,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:55:35,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:55:35,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:55:35,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:55:35,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:55:35,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:55:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:55:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:55:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:55:35,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:55:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:55:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:55:35,566 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:55:35,662 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:55:35,664 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:55:35,936 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:55:35,936 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:55:36,197 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:55:36,198 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:55:36,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:36 BoogieIcfgContainer [2024-11-09 10:55:36,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:55:36,201 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:55:36,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:55:36,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:55:36,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:55:35" (1/3) ... [2024-11-09 10:55:36,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ce427e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:36, skipping insertion in model container [2024-11-09 10:55:36,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (2/3) ... [2024-11-09 10:55:36,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ce427e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:36, skipping insertion in model container [2024-11-09 10:55:36,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:36" (3/3) ... [2024-11-09 10:55:36,211 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-11-09 10:55:36,229 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:55:36,230 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-09 10:55:36,230 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:55:36,287 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:55:36,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-11-09 10:55:36,357 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-09 10:55:36,358 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:55:36,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 80 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-09 10:55:36,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-11-09 10:55:36,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-11-09 10:55:36,382 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:55:36,390 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;@2a4cf695, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:55:36,390 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-09 10:55:36,394 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:55:36,394 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:55:36,394 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:55:36,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:36,395 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:55:36,396 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:36,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash 494350, now seen corresponding path program 1 times [2024-11-09 10:55:36,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:36,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965801281] [2024-11-09 10:55:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:36,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:36,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:36,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965801281] [2024-11-09 10:55:36,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965801281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:36,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:36,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:55:36,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384758839] [2024-11-09 10:55:36,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:36,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:36,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:36,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:36,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:55:36,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:36,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:36,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:55:36,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:36,968 INFO L124 PetriNetUnfolderBase]: 193/366 cut-off events. [2024-11-09 10:55:36,969 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-09 10:55:36,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 366 events. 193/366 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1753 event pairs, 172 based on Foata normal form. 22/260 useless extension candidates. Maximal degree in co-relation 686. Up to 336 conditions per place. [2024-11-09 10:55:36,978 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 24 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-11-09 10:55:36,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 130 flow [2024-11-09 10:55:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-09 10:55:36,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-11-09 10:55:36,994 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 59 transitions. [2024-11-09 10:55:36,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 130 flow [2024-11-09 10:55:36,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 122 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:55:37,002 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 74 flow [2024-11-09 10:55:37,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-09 10:55:37,009 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-09 10:55:37,010 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 74 flow [2024-11-09 10:55:37,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:37,010 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:55:37,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:55:37,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:37,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash 494351, now seen corresponding path program 1 times [2024-11-09 10:55:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:37,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083997159] [2024-11-09 10:55:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:37,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:37,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:37,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083997159] [2024-11-09 10:55:37,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083997159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:37,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:37,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:37,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584457056] [2024-11-09 10:55:37,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:37,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:37,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:37,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:55:37,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:37,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:55:37,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:37,581 INFO L124 PetriNetUnfolderBase]: 194/369 cut-off events. [2024-11-09 10:55:37,581 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:55:37,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 369 events. 194/369 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1783 event pairs, 172 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 706. Up to 341 conditions per place. [2024-11-09 10:55:37,589 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 26 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-09 10:55:37,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 142 flow [2024-11-09 10:55:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-09 10:55:37,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-11-09 10:55:37,593 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 74 flow. Second operand 4 states and 71 transitions. [2024-11-09 10:55:37,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 142 flow [2024-11-09 10:55:37,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:37,595 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 97 flow [2024-11-09 10:55:37,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-09 10:55:37,597 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2024-11-09 10:55:37,598 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 97 flow [2024-11-09 10:55:37,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:37,598 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:55:37,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:55:37,599 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:37,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 475087084, now seen corresponding path program 1 times [2024-11-09 10:55:37,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:37,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641550038] [2024-11-09 10:55:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:37,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641550038] [2024-11-09 10:55:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641550038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:37,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407926053] [2024-11-09 10:55:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:37,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:37,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:37,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:37,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:55:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:38,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:55:38,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:38,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:55:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:38,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:38,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407926053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:38,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:38,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:55:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494826443] [2024-11-09 10:55:38,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:38,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:55:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:55:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:55:38,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:55:38,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:38,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:38,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:55:38,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:38,823 INFO L124 PetriNetUnfolderBase]: 194/368 cut-off events. [2024-11-09 10:55:38,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:55:38,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 368 events. 194/368 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1768 event pairs, 172 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 713. Up to 337 conditions per place. [2024-11-09 10:55:38,827 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 7 changer transitions 0/35 dead transitions. [2024-11-09 10:55:38,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 151 flow [2024-11-09 10:55:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:55:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:55:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-09 10:55:38,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-09 10:55:38,832 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 97 flow. Second operand 6 states and 90 transitions. [2024-11-09 10:55:38,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 151 flow [2024-11-09 10:55:38,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:38,834 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 104 flow [2024-11-09 10:55:38,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-11-09 10:55:38,836 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-11-09 10:55:38,836 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 104 flow [2024-11-09 10:55:38,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:38,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:38,837 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:55:38,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:55:39,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:39,042 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:39,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:39,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1844743689, now seen corresponding path program 1 times [2024-11-09 10:55:39,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:39,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503096737] [2024-11-09 10:55:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:39,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:39,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503096737] [2024-11-09 10:55:39,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503096737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:39,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:39,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:39,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464596698] [2024-11-09 10:55:39,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:39,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:39,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:39,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:55:39,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:39,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:55:39,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:39,211 INFO L124 PetriNetUnfolderBase]: 132/258 cut-off events. [2024-11-09 10:55:39,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:55:39,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 258 events. 132/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1095 event pairs, 113 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 496. Up to 230 conditions per place. [2024-11-09 10:55:39,214 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-09 10:55:39,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 150 flow [2024-11-09 10:55:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-09 10:55:39,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-09 10:55:39,218 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 104 flow. Second operand 4 states and 66 transitions. [2024-11-09 10:55:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 150 flow [2024-11-09 10:55:39,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 120 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-09 10:55:39,221 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 74 flow [2024-11-09 10:55:39,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-11-09 10:55:39,223 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2024-11-09 10:55:39,223 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 74 flow [2024-11-09 10:55:39,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:39,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:55:39,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:55:39,225 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:39,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1844743690, now seen corresponding path program 1 times [2024-11-09 10:55:39,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:39,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805554354] [2024-11-09 10:55:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:39,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:39,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805554354] [2024-11-09 10:55:39,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805554354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:39,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:39,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:39,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415538026] [2024-11-09 10:55:39,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:39,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:39,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:55:39,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:39,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:55:39,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:39,409 INFO L124 PetriNetUnfolderBase]: 144/294 cut-off events. [2024-11-09 10:55:39,409 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:55:39,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 294 events. 144/294 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1231 event pairs, 126 based on Foata normal form. 14/252 useless extension candidates. Maximal degree in co-relation 488. Up to 233 conditions per place. [2024-11-09 10:55:39,411 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 23 selfloop transitions, 2 changer transitions 8/39 dead transitions. [2024-11-09 10:55:39,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 156 flow [2024-11-09 10:55:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-09 10:55:39,413 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-11-09 10:55:39,413 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 74 flow. Second operand 4 states and 83 transitions. [2024-11-09 10:55:39,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 156 flow [2024-11-09 10:55:39,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:39,415 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 83 flow [2024-11-09 10:55:39,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-11-09 10:55:39,416 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-09 10:55:39,416 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 83 flow [2024-11-09 10:55:39,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:39,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:39,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:55:39,417 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:39,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:39,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1404514061, now seen corresponding path program 1 times [2024-11-09 10:55:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154352342] [2024-11-09 10:55:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:39,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:39,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154352342] [2024-11-09 10:55:39,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154352342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:39,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:39,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135418653] [2024-11-09 10:55:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:39,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:39,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:39,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:55:39,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:39,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:55:39,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:39,649 INFO L124 PetriNetUnfolderBase]: 81/167 cut-off events. [2024-11-09 10:55:39,649 INFO L125 PetriNetUnfolderBase]: For 27/30 co-relation queries the response was YES. [2024-11-09 10:55:39,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 167 events. 81/167 cut-off events. For 27/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 554 event pairs, 66 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 350. Up to 143 conditions per place. [2024-11-09 10:55:39,652 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-11-09 10:55:39,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 115 flow [2024-11-09 10:55:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-09 10:55:39,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-09 10:55:39,653 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 83 flow. Second operand 4 states and 67 transitions. [2024-11-09 10:55:39,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 115 flow [2024-11-09 10:55:39,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 111 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:39,654 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 71 flow [2024-11-09 10:55:39,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-09 10:55:39,655 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -7 predicate places. [2024-11-09 10:55:39,655 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 71 flow [2024-11-09 10:55:39,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:39,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:39,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:55:39,656 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:39,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1693792893, now seen corresponding path program 1 times [2024-11-09 10:55:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708939798] [2024-11-09 10:55:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:39,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708939798] [2024-11-09 10:55:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708939798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:39,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351636735] [2024-11-09 10:55:39,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:39,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:39,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:39,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:55:39,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:39,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:55:39,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:39,806 INFO L124 PetriNetUnfolderBase]: 99/210 cut-off events. [2024-11-09 10:55:39,807 INFO L125 PetriNetUnfolderBase]: For 35/38 co-relation queries the response was YES. [2024-11-09 10:55:39,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 210 events. 99/210 cut-off events. For 35/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 681 event pairs, 27 based on Foata normal form. 3/201 useless extension candidates. Maximal degree in co-relation 418. Up to 132 conditions per place. [2024-11-09 10:55:39,809 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 26 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-11-09 10:55:39,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 148 flow [2024-11-09 10:55:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-09 10:55:39,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-11-09 10:55:39,811 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 71 flow. Second operand 3 states and 61 transitions. [2024-11-09 10:55:39,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 148 flow [2024-11-09 10:55:39,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:39,814 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 91 flow [2024-11-09 10:55:39,814 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-11-09 10:55:39,815 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2024-11-09 10:55:39,816 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 91 flow [2024-11-09 10:55:39,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:39,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:39,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:55:39,817 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:39,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1219024711, now seen corresponding path program 2 times [2024-11-09 10:55:39,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:39,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274686604] [2024-11-09 10:55:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:39,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:40,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:40,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274686604] [2024-11-09 10:55:40,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274686604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:40,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:40,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 10:55:40,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8940397] [2024-11-09 10:55:40,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:40,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:55:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:55:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:55:40,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:55:40,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 91 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:40,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:40,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:55:40,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:40,184 INFO L124 PetriNetUnfolderBase]: 191/391 cut-off events. [2024-11-09 10:55:40,184 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-11-09 10:55:40,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 391 events. 191/391 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1578 event pairs, 40 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 905. Up to 129 conditions per place. [2024-11-09 10:55:40,189 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 46 selfloop transitions, 9 changer transitions 6/65 dead transitions. [2024-11-09 10:55:40,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 314 flow [2024-11-09 10:55:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:55:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:55:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-11-09 10:55:40,193 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-09 10:55:40,193 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 91 flow. Second operand 8 states and 132 transitions. [2024-11-09 10:55:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 314 flow [2024-11-09 10:55:40,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 289 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:40,196 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 128 flow [2024-11-09 10:55:40,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=128, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-09 10:55:40,197 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2024-11-09 10:55:40,198 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 128 flow [2024-11-09 10:55:40,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:40,199 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:40,199 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:40,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:55:40,199 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:40,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2001376806, now seen corresponding path program 1 times [2024-11-09 10:55:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:40,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368576650] [2024-11-09 10:55:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:40,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:40,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:40,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368576650] [2024-11-09 10:55:40,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368576650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:40,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858468651] [2024-11-09 10:55:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:40,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:40,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:40,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:55:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:40,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:55:40,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:40,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:40,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858468651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:40,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:40,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-09 10:55:40,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044183822] [2024-11-09 10:55:40,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:40,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:55:40,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:55:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:55:40,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:55:40,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 128 flow. Second operand has 12 states, 12 states have (on average 14.333333333333334) internal successors, (172), 12 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:40,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:40,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:55:40,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:40,845 INFO L124 PetriNetUnfolderBase]: 243/567 cut-off events. [2024-11-09 10:55:40,845 INFO L125 PetriNetUnfolderBase]: For 301/322 co-relation queries the response was YES. [2024-11-09 10:55:40,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 567 events. 243/567 cut-off events. For 301/322 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2852 event pairs, 137 based on Foata normal form. 25/570 useless extension candidates. Maximal degree in co-relation 1389. Up to 262 conditions per place. [2024-11-09 10:55:40,851 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 42 selfloop transitions, 7 changer transitions 4/62 dead transitions. [2024-11-09 10:55:40,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 323 flow [2024-11-09 10:55:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:55:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:55:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-11-09 10:55:40,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-09 10:55:40,853 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 128 flow. Second operand 7 states and 125 transitions. [2024-11-09 10:55:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 323 flow [2024-11-09 10:55:40,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 312 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:40,856 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 171 flow [2024-11-09 10:55:40,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-09 10:55:40,858 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-11-09 10:55:40,858 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 171 flow [2024-11-09 10:55:40,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.333333333333334) internal successors, (172), 12 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:40,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:40,859 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:40,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:55:41,063 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,SelfDestructingSolverStorable8 [2024-11-09 10:55:41,064 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:41,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1836493961, now seen corresponding path program 1 times [2024-11-09 10:55:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:41,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167417511] [2024-11-09 10:55:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:41,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:41,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167417511] [2024-11-09 10:55:41,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167417511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:41,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661002136] [2024-11-09 10:55:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:41,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:41,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:41,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:41,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:55:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:41,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:55:41,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:41,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:41,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661002136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:41,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:41,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-09 10:55:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310074297] [2024-11-09 10:55:41,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:41,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:55:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:55:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:55:41,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:55:41,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 171 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:41,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:41,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:55:41,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:41,789 INFO L124 PetriNetUnfolderBase]: 176/417 cut-off events. [2024-11-09 10:55:41,789 INFO L125 PetriNetUnfolderBase]: For 259/261 co-relation queries the response was YES. [2024-11-09 10:55:41,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 417 events. 176/417 cut-off events. For 259/261 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1831 event pairs, 52 based on Foata normal form. 6/420 useless extension candidates. Maximal degree in co-relation 820. Up to 214 conditions per place. [2024-11-09 10:55:41,792 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 26 selfloop transitions, 7 changer transitions 19/61 dead transitions. [2024-11-09 10:55:41,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 333 flow [2024-11-09 10:55:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:55:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:55:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-11-09 10:55:41,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-09 10:55:41,794 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 171 flow. Second operand 9 states and 150 transitions. [2024-11-09 10:55:41,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 333 flow [2024-11-09 10:55:41,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 326 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:41,797 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 166 flow [2024-11-09 10:55:41,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2024-11-09 10:55:41,798 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2024-11-09 10:55:41,798 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 166 flow [2024-11-09 10:55:41,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:41,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:41,798 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:41,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:55:41,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:42,000 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:42,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -787490031, now seen corresponding path program 2 times [2024-11-09 10:55:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:42,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144281750] [2024-11-09 10:55:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:42,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:42,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144281750] [2024-11-09 10:55:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144281750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386114837] [2024-11-09 10:55:42,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:55:42,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:42,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:42,520 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:42,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:55:42,612 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:55:42,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:42,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:55:42,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:42,906 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:55:42,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-09 10:55:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:42,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:43,070 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:55:43,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-09 10:55:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386114837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:43,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:43,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-09 10:55:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723117003] [2024-11-09 10:55:43,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:43,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:55:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:55:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:55:43,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:55:43,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 166 flow. Second operand has 22 states, 22 states have (on average 11.727272727272727) internal successors, (258), 22 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:43,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:43,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:55:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:44,831 INFO L124 PetriNetUnfolderBase]: 664/1329 cut-off events. [2024-11-09 10:55:44,831 INFO L125 PetriNetUnfolderBase]: For 1058/1061 co-relation queries the response was YES. [2024-11-09 10:55:44,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 1329 events. 664/1329 cut-off events. For 1058/1061 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7228 event pairs, 93 based on Foata normal form. 40/1363 useless extension candidates. Maximal degree in co-relation 3338. Up to 304 conditions per place. [2024-11-09 10:55:44,842 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 130 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-11-09 10:55:44,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 173 transitions, 1004 flow [2024-11-09 10:55:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 10:55:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-09 10:55:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 324 transitions. [2024-11-09 10:55:44,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-09 10:55:44,845 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 166 flow. Second operand 18 states and 324 transitions. [2024-11-09 10:55:44,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 173 transitions, 1004 flow [2024-11-09 10:55:44,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 173 transitions, 942 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-11-09 10:55:44,853 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 486 flow [2024-11-09 10:55:44,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=486, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-11-09 10:55:44,854 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-11-09 10:55:44,854 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 486 flow [2024-11-09 10:55:44,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.727272727272727) internal successors, (258), 22 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:44,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:44,856 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:44,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:55:45,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:45,060 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:45,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash -15690443, now seen corresponding path program 3 times [2024-11-09 10:55:45,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:45,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25001486] [2024-11-09 10:55:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:45,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:45,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:45,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25001486] [2024-11-09 10:55:45,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25001486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742697690] [2024-11-09 10:55:45,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:55:45,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:45,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:45,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:55:45,626 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:55:45,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:45,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 10:55:45,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:55:45,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:45,770 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:55:45,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-09 10:55:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:55:45,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742697690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:45,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:45,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2024-11-09 10:55:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022167078] [2024-11-09 10:55:45,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:45,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:55:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:55:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:55:45,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:55:45,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 486 flow. Second operand has 14 states, 14 states have (on average 12.142857142857142) internal successors, (170), 14 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:45,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:45,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:55:45,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:46,416 INFO L124 PetriNetUnfolderBase]: 788/1583 cut-off events. [2024-11-09 10:55:46,416 INFO L125 PetriNetUnfolderBase]: For 4992/4994 co-relation queries the response was YES. [2024-11-09 10:55:46,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5397 conditions, 1583 events. 788/1583 cut-off events. For 4992/4994 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8726 event pairs, 110 based on Foata normal form. 42/1619 useless extension candidates. Maximal degree in co-relation 4067. Up to 523 conditions per place. [2024-11-09 10:55:46,432 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-11-09 10:55:46,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 160 transitions, 1253 flow [2024-11-09 10:55:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:55:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:55:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-11-09 10:55:46,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2024-11-09 10:55:46,434 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 486 flow. Second operand 12 states and 203 transitions. [2024-11-09 10:55:46,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 160 transitions, 1253 flow [2024-11-09 10:55:46,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 160 transitions, 1175 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:46,450 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 645 flow [2024-11-09 10:55:46,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=645, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-11-09 10:55:46,452 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 44 predicate places. [2024-11-09 10:55:46,452 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 645 flow [2024-11-09 10:55:46,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.142857142857142) internal successors, (170), 14 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:46,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:46,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:46,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:55:46,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 10:55:46,654 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:46,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1117713478, now seen corresponding path program 2 times [2024-11-09 10:55:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580464799] [2024-11-09 10:55:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:55:46,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:46,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580464799] [2024-11-09 10:55:46,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580464799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:46,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:46,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:55:46,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817666310] [2024-11-09 10:55:46,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:46,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:46,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:46,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:55:46,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 645 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:46,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:46,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:55:46,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:46,994 INFO L124 PetriNetUnfolderBase]: 698/1632 cut-off events. [2024-11-09 10:55:46,995 INFO L125 PetriNetUnfolderBase]: For 7298/7421 co-relation queries the response was YES. [2024-11-09 10:55:47,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5693 conditions, 1632 events. 698/1632 cut-off events. For 7298/7421 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10402 event pairs, 126 based on Foata normal form. 52/1618 useless extension candidates. Maximal degree in co-relation 4218. Up to 695 conditions per place. [2024-11-09 10:55:47,008 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 76 selfloop transitions, 25 changer transitions 6/124 dead transitions. [2024-11-09 10:55:47,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 124 transitions, 1030 flow [2024-11-09 10:55:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-11-09 10:55:47,010 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-09 10:55:47,010 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 645 flow. Second operand 4 states and 92 transitions. [2024-11-09 10:55:47,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 124 transitions, 1030 flow [2024-11-09 10:55:47,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 1002 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-09 10:55:47,029 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 807 flow [2024-11-09 10:55:47,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=807, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-11-09 10:55:47,030 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-11-09 10:55:47,030 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 807 flow [2024-11-09 10:55:47,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:47,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:47,031 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:47,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:55:47,031 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:47,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash 13768755, now seen corresponding path program 1 times [2024-11-09 10:55:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:47,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41975887] [2024-11-09 10:55:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:47,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:47,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41975887] [2024-11-09 10:55:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41975887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729083962] [2024-11-09 10:55:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:47,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:47,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:47,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:47,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:55:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:47,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 10:55:47,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:48,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 12 treesize of output 3 [2024-11-09 10:55:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:48,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:48,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:48,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:55:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729083962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:49,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:49,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2024-11-09 10:55:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478350409] [2024-11-09 10:55:49,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:49,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 10:55:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 10:55:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 10:55:49,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:55:49,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 807 flow. Second operand has 40 states, 40 states have (on average 8.95) internal successors, (358), 40 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:49,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:49,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:55:49,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:52,774 INFO L124 PetriNetUnfolderBase]: 2731/5058 cut-off events. [2024-11-09 10:55:52,774 INFO L125 PetriNetUnfolderBase]: For 21663/21663 co-relation queries the response was YES. [2024-11-09 10:55:52,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19151 conditions, 5058 events. 2731/5058 cut-off events. For 21663/21663 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 32278 event pairs, 253 based on Foata normal form. 5/5063 useless extension candidates. Maximal degree in co-relation 14928. Up to 1858 conditions per place. [2024-11-09 10:55:52,809 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 242 selfloop transitions, 191 changer transitions 52/487 dead transitions. [2024-11-09 10:55:52,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 487 transitions, 4235 flow [2024-11-09 10:55:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 10:55:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-09 10:55:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 659 transitions. [2024-11-09 10:55:52,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32303921568627453 [2024-11-09 10:55:52,813 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 807 flow. Second operand 51 states and 659 transitions. [2024-11-09 10:55:52,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 487 transitions, 4235 flow [2024-11-09 10:55:52,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 487 transitions, 4109 flow, removed 63 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:52,869 INFO L231 Difference]: Finished difference. Result has 164 places, 271 transitions, 3117 flow [2024-11-09 10:55:52,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3117, PETRI_PLACES=164, PETRI_TRANSITIONS=271} [2024-11-09 10:55:52,869 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2024-11-09 10:55:52,869 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 271 transitions, 3117 flow [2024-11-09 10:55:52,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 8.95) internal successors, (358), 40 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:52,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:52,870 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:52,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:55:53,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:53,075 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:53,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1293637995, now seen corresponding path program 2 times [2024-11-09 10:55:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009370418] [2024-11-09 10:55:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:53,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:53,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009370418] [2024-11-09 10:55:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009370418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:53,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080825961] [2024-11-09 10:55:53,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:55:53,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:53,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:53,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:55:53,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:55:53,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:53,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:55:53,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:54,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 3 [2024-11-09 10:55:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:54,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:54,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:54,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:55:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:54,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080825961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:54,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:54,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-11-09 10:55:54,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481348781] [2024-11-09 10:55:54,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:54,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 10:55:54,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:54,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 10:55:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 10:55:55,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:55:55,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 271 transitions, 3117 flow. Second operand has 41 states, 41 states have (on average 8.902439024390244) internal successors, (365), 41 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:55,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:55,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:55:55,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:01,964 INFO L124 PetriNetUnfolderBase]: 4909/9210 cut-off events. [2024-11-09 10:56:01,965 INFO L125 PetriNetUnfolderBase]: For 89359/89359 co-relation queries the response was YES. [2024-11-09 10:56:02,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47966 conditions, 9210 events. 4909/9210 cut-off events. For 89359/89359 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 68093 event pairs, 306 based on Foata normal form. 11/9221 useless extension candidates. Maximal degree in co-relation 47839. Up to 2542 conditions per place. [2024-11-09 10:56:02,058 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 431 selfloop transitions, 671 changer transitions 83/1187 dead transitions. [2024-11-09 10:56:02,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1187 transitions, 14509 flow [2024-11-09 10:56:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-11-09 10:56:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2024-11-09 10:56:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 1444 transitions. [2024-11-09 10:56:02,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34056603773584904 [2024-11-09 10:56:02,065 INFO L175 Difference]: Start difference. First operand has 164 places, 271 transitions, 3117 flow. Second operand 106 states and 1444 transitions. [2024-11-09 10:56:02,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1187 transitions, 14509 flow [2024-11-09 10:56:02,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1187 transitions, 13977 flow, removed 259 selfloop flow, removed 10 redundant places. [2024-11-09 10:56:02,521 INFO L231 Difference]: Finished difference. Result has 282 places, 836 transitions, 12100 flow [2024-11-09 10:56:02,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=12100, PETRI_PLACES=282, PETRI_TRANSITIONS=836} [2024-11-09 10:56:02,522 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 242 predicate places. [2024-11-09 10:56:02,522 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 836 transitions, 12100 flow [2024-11-09 10:56:02,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.902439024390244) internal successors, (365), 41 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:02,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:02,522 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:02,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:02,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:02,723 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:02,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash 437170935, now seen corresponding path program 3 times [2024-11-09 10:56:02,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:02,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416557383] [2024-11-09 10:56:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:03,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416557383] [2024-11-09 10:56:03,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416557383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852414000] [2024-11-09 10:56:03,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:56:03,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:03,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:03,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:03,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:56:03,444 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:56:03,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:03,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:56:03,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:56:03,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:03,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:03,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:56:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:56:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852414000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:03,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:03,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 31 [2024-11-09 10:56:03,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890208468] [2024-11-09 10:56:03,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:03,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 10:56:03,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 10:56:03,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:56:03,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:56:03,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 836 transitions, 12100 flow. Second operand has 32 states, 32 states have (on average 9.09375) internal successors, (291), 32 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:03,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:03,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:56:03,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:07,100 INFO L124 PetriNetUnfolderBase]: 5011/9378 cut-off events. [2024-11-09 10:56:07,101 INFO L125 PetriNetUnfolderBase]: For 139331/139331 co-relation queries the response was YES. [2024-11-09 10:56:07,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58600 conditions, 9378 events. 5011/9378 cut-off events. For 139331/139331 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 69451 event pairs, 436 based on Foata normal form. 2/9380 useless extension candidates. Maximal degree in co-relation 58486. Up to 3285 conditions per place. [2024-11-09 10:56:07,190 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 622 selfloop transitions, 538 changer transitions 29/1191 dead transitions. [2024-11-09 10:56:07,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1191 transitions, 18837 flow [2024-11-09 10:56:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 10:56:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-09 10:56:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 469 transitions. [2024-11-09 10:56:07,193 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3168918918918919 [2024-11-09 10:56:07,193 INFO L175 Difference]: Start difference. First operand has 282 places, 836 transitions, 12100 flow. Second operand 37 states and 469 transitions. [2024-11-09 10:56:07,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1191 transitions, 18837 flow [2024-11-09 10:56:08,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 1191 transitions, 16012 flow, removed 1364 selfloop flow, removed 23 redundant places. [2024-11-09 10:56:08,218 INFO L231 Difference]: Finished difference. Result has 297 places, 982 transitions, 13170 flow [2024-11-09 10:56:08,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9869, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13170, PETRI_PLACES=297, PETRI_TRANSITIONS=982} [2024-11-09 10:56:08,219 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 257 predicate places. [2024-11-09 10:56:08,219 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 982 transitions, 13170 flow [2024-11-09 10:56:08,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.09375) internal successors, (291), 32 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:08,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:08,220 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:08,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:56:08,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:56:08,420 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:08,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash -421263, now seen corresponding path program 4 times [2024-11-09 10:56:08,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:08,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553449040] [2024-11-09 10:56:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:08,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:09,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553449040] [2024-11-09 10:56:09,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553449040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:09,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866074495] [2024-11-09 10:56:09,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:56:09,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:09,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:09,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:56:09,239 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:56:09,239 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:09,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 10:56:09,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:09,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:09,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-09 10:56:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:09,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:10,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:10,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:56:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:10,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866074495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:10,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:10,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-11-09 10:56:10,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578615652] [2024-11-09 10:56:10,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:10,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 10:56:10,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 10:56:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 10:56:10,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:56:10,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 982 transitions, 13170 flow. Second operand has 41 states, 41 states have (on average 8.902439024390244) internal successors, (365), 41 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:10,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:10,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:56:10,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:19,116 INFO L124 PetriNetUnfolderBase]: 6843/12795 cut-off events. [2024-11-09 10:56:19,116 INFO L125 PetriNetUnfolderBase]: For 180751/180751 co-relation queries the response was YES. [2024-11-09 10:56:19,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76889 conditions, 12795 events. 6843/12795 cut-off events. For 180751/180751 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 99498 event pairs, 460 based on Foata normal form. 17/12812 useless extension candidates. Maximal degree in co-relation 76776. Up to 4814 conditions per place. [2024-11-09 10:56:19,259 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 737 selfloop transitions, 932 changer transitions 129/1800 dead transitions. [2024-11-09 10:56:19,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1800 transitions, 26292 flow [2024-11-09 10:56:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-09 10:56:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2024-11-09 10:56:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 1204 transitions. [2024-11-09 10:56:19,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3202127659574468 [2024-11-09 10:56:19,263 INFO L175 Difference]: Start difference. First operand has 297 places, 982 transitions, 13170 flow. Second operand 94 states and 1204 transitions. [2024-11-09 10:56:19,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1800 transitions, 26292 flow [2024-11-09 10:56:20,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1800 transitions, 25786 flow, removed 227 selfloop flow, removed 15 redundant places. [2024-11-09 10:56:20,847 INFO L231 Difference]: Finished difference. Result has 404 places, 1416 transitions, 22128 flow [2024-11-09 10:56:20,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12978, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=22128, PETRI_PLACES=404, PETRI_TRANSITIONS=1416} [2024-11-09 10:56:20,849 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 364 predicate places. [2024-11-09 10:56:20,849 INFO L471 AbstractCegarLoop]: Abstraction has has 404 places, 1416 transitions, 22128 flow [2024-11-09 10:56:20,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.902439024390244) internal successors, (365), 41 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:20,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:20,850 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:20,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:56:21,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:56:21,050 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:21,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1830369352, now seen corresponding path program 5 times [2024-11-09 10:56:21,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:21,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555152910] [2024-11-09 10:56:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:21,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555152910] [2024-11-09 10:56:21,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555152910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:21,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755248805] [2024-11-09 10:56:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:56:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:21,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:21,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:56:22,060 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-09 10:56:22,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:22,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:56:22,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:56:22,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:22,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:22,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:56:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:56:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755248805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:22,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:22,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-09 10:56:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72242299] [2024-11-09 10:56:22,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:22,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 10:56:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 10:56:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 10:56:22,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:56:22,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1416 transitions, 22128 flow. Second operand has 34 states, 34 states have (on average 9.058823529411764) internal successors, (308), 34 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:22,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:22,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:56:22,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:27,021 INFO L124 PetriNetUnfolderBase]: 6510/12167 cut-off events. [2024-11-09 10:56:27,022 INFO L125 PetriNetUnfolderBase]: For 299237/299237 co-relation queries the response was YES. [2024-11-09 10:56:27,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85021 conditions, 12167 events. 6510/12167 cut-off events. For 299237/299237 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 93704 event pairs, 603 based on Foata normal form. 2/12169 useless extension candidates. Maximal degree in co-relation 84799. Up to 5810 conditions per place. [2024-11-09 10:56:27,183 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 874 selfloop transitions, 720 changer transitions 18/1614 dead transitions. [2024-11-09 10:56:27,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1614 transitions, 27553 flow [2024-11-09 10:56:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 10:56:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-09 10:56:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 371 transitions. [2024-11-09 10:56:27,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33125 [2024-11-09 10:56:27,186 INFO L175 Difference]: Start difference. First operand has 404 places, 1416 transitions, 22128 flow. Second operand 28 states and 371 transitions. [2024-11-09 10:56:27,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1614 transitions, 27553 flow [2024-11-09 10:56:29,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1614 transitions, 26606 flow, removed 432 selfloop flow, removed 16 redundant places. [2024-11-09 10:56:29,921 INFO L231 Difference]: Finished difference. Result has 405 places, 1457 transitions, 24279 flow [2024-11-09 10:56:29,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21269, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=678, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=24279, PETRI_PLACES=405, PETRI_TRANSITIONS=1457} [2024-11-09 10:56:29,923 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 365 predicate places. [2024-11-09 10:56:29,923 INFO L471 AbstractCegarLoop]: Abstraction has has 405 places, 1457 transitions, 24279 flow [2024-11-09 10:56:29,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.058823529411764) internal successors, (308), 34 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:29,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:29,923 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:29,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:30,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:56:30,124 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:30,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1797518288, now seen corresponding path program 6 times [2024-11-09 10:56:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254094417] [2024-11-09 10:56:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:30,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:30,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:30,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254094417] [2024-11-09 10:56:30,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254094417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:30,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68748049] [2024-11-09 10:56:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:56:30,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:30,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:30,966 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:30,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:56:31,042 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 10:56:31,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:31,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:56:31,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:56:31,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:31,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:31,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:56:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:56:31,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68748049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:31,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:31,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 31 [2024-11-09 10:56:31,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72160027] [2024-11-09 10:56:31,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:31,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 10:56:31,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 10:56:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:56:31,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:56:31,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1457 transitions, 24279 flow. Second operand has 32 states, 32 states have (on average 9.09375) internal successors, (291), 32 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:31,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:31,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:56:31,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:35,972 INFO L124 PetriNetUnfolderBase]: 6462/12065 cut-off events. [2024-11-09 10:56:35,972 INFO L125 PetriNetUnfolderBase]: For 322229/322229 co-relation queries the response was YES. [2024-11-09 10:56:36,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87350 conditions, 12065 events. 6462/12065 cut-off events. For 322229/322229 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 92659 event pairs, 578 based on Foata normal form. 1/12066 useless extension candidates. Maximal degree in co-relation 87154. Up to 5558 conditions per place. [2024-11-09 10:56:36,161 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 784 selfloop transitions, 805 changer transitions 25/1616 dead transitions. [2024-11-09 10:56:36,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1616 transitions, 28978 flow [2024-11-09 10:56:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 10:56:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-09 10:56:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 407 transitions. [2024-11-09 10:56:36,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3282258064516129 [2024-11-09 10:56:36,163 INFO L175 Difference]: Start difference. First operand has 405 places, 1457 transitions, 24279 flow. Second operand 31 states and 407 transitions. [2024-11-09 10:56:36,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1616 transitions, 28978 flow [2024-11-09 10:56:38,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1616 transitions, 28898 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-11-09 10:56:38,978 INFO L231 Difference]: Finished difference. Result has 428 places, 1462 transitions, 26030 flow [2024-11-09 10:56:38,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=24205, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26030, PETRI_PLACES=428, PETRI_TRANSITIONS=1462} [2024-11-09 10:56:38,979 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 388 predicate places. [2024-11-09 10:56:38,979 INFO L471 AbstractCegarLoop]: Abstraction has has 428 places, 1462 transitions, 26030 flow [2024-11-09 10:56:38,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.09375) internal successors, (291), 32 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:38,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:38,980 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:38,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:56:39,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:39,180 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:39,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash 896019896, now seen corresponding path program 7 times [2024-11-09 10:56:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:39,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022011081] [2024-11-09 10:56:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:39,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:39,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022011081] [2024-11-09 10:56:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022011081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707128748] [2024-11-09 10:56:39,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:56:39,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:39,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:39,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:39,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:56:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:40,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 10:56:40,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:40,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:40,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:40,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:56:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:56:40,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707128748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:40,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:40,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-11-09 10:56:40,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271327889] [2024-11-09 10:56:40,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:40,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 10:56:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 10:56:40,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 10:56:40,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:56:40,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1462 transitions, 26030 flow. Second operand has 36 states, 36 states have (on average 9.027777777777779) internal successors, (325), 36 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:40,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:40,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:56:40,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:45,237 INFO L124 PetriNetUnfolderBase]: 6754/12586 cut-off events. [2024-11-09 10:56:45,237 INFO L125 PetriNetUnfolderBase]: For 352113/352113 co-relation queries the response was YES. [2024-11-09 10:56:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94388 conditions, 12586 events. 6754/12586 cut-off events. For 352113/352113 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 96982 event pairs, 652 based on Foata normal form. 1/12587 useless extension candidates. Maximal degree in co-relation 94191. Up to 6688 conditions per place. [2024-11-09 10:56:45,412 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 853 selfloop transitions, 785 changer transitions 42/1682 dead transitions. [2024-11-09 10:56:45,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1682 transitions, 31820 flow [2024-11-09 10:56:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 10:56:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-09 10:56:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 356 transitions. [2024-11-09 10:56:45,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31785714285714284 [2024-11-09 10:56:45,414 INFO L175 Difference]: Start difference. First operand has 428 places, 1462 transitions, 26030 flow. Second operand 28 states and 356 transitions. [2024-11-09 10:56:45,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1682 transitions, 31820 flow [2024-11-09 10:56:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1682 transitions, 30789 flow, removed 40 selfloop flow, removed 22 redundant places. [2024-11-09 10:56:48,347 INFO L231 Difference]: Finished difference. Result has 433 places, 1515 transitions, 28542 flow [2024-11-09 10:56:48,348 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=25074, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=28542, PETRI_PLACES=433, PETRI_TRANSITIONS=1515} [2024-11-09 10:56:48,348 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 393 predicate places. [2024-11-09 10:56:48,349 INFO L471 AbstractCegarLoop]: Abstraction has has 433 places, 1515 transitions, 28542 flow [2024-11-09 10:56:48,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.027777777777779) internal successors, (325), 36 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:48,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:48,349 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:48,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:48,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:48,550 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:48,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash -282574608, now seen corresponding path program 8 times [2024-11-09 10:56:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:48,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81681704] [2024-11-09 10:56:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:48,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:56:48,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81681704] [2024-11-09 10:56:48,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81681704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221198870] [2024-11-09 10:56:48,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:56:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:48,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:56:48,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:56:48,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:48,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:56:48,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:56:48,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:56:48,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221198870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:48,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:48,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-09 10:56:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290087412] [2024-11-09 10:56:48,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:48,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:56:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:56:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:56:49,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:56:49,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1515 transitions, 28542 flow. Second operand has 18 states, 18 states have (on average 13.666666666666666) internal successors, (246), 18 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:49,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:49,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:56:49,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:50,304 INFO L124 PetriNetUnfolderBase]: 1263/2936 cut-off events. [2024-11-09 10:56:50,304 INFO L125 PetriNetUnfolderBase]: For 106048/106140 co-relation queries the response was YES. [2024-11-09 10:56:50,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24507 conditions, 2936 events. 1263/2936 cut-off events. For 106048/106140 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21497 event pairs, 384 based on Foata normal form. 372/3280 useless extension candidates. Maximal degree in co-relation 24394. Up to 1127 conditions per place. [2024-11-09 10:56:50,332 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 167 selfloop transitions, 10 changer transitions 228/490 dead transitions. [2024-11-09 10:56:50,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 490 transitions, 9408 flow [2024-11-09 10:56:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:56:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:56:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-11-09 10:56:50,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-09 10:56:50,334 INFO L175 Difference]: Start difference. First operand has 433 places, 1515 transitions, 28542 flow. Second operand 9 states and 156 transitions. [2024-11-09 10:56:50,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 490 transitions, 9408 flow [2024-11-09 10:56:50,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 490 transitions, 8970 flow, removed 78 selfloop flow, removed 58 redundant places. [2024-11-09 10:56:50,658 INFO L231 Difference]: Finished difference. Result has 296 places, 244 transitions, 4339 flow [2024-11-09 10:56:50,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8209, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4339, PETRI_PLACES=296, PETRI_TRANSITIONS=244} [2024-11-09 10:56:50,659 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 256 predicate places. [2024-11-09 10:56:50,659 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 244 transitions, 4339 flow [2024-11-09 10:56:50,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.666666666666666) internal successors, (246), 18 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:50,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:50,659 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:50,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:50,860 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,SelfDestructingSolverStorable20 [2024-11-09 10:56:50,860 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:50,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1101905703, now seen corresponding path program 9 times [2024-11-09 10:56:50,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:50,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18940975] [2024-11-09 10:56:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:56:50,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:50,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18940975] [2024-11-09 10:56:50,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18940975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:50,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546782413] [2024-11-09 10:56:50,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:56:50,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:50,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:50,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:50,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:56:51,058 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:56:51,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:51,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:56:51,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:51,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:51,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546782413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:51,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:51,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2024-11-09 10:56:51,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588136572] [2024-11-09 10:56:51,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:51,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:56:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:56:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:56:51,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-09 10:56:51,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 244 transitions, 4339 flow. Second operand has 17 states, 17 states have (on average 14.0) internal successors, (238), 17 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:51,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:51,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-09 10:56:51,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:52,090 INFO L124 PetriNetUnfolderBase]: 1344/2830 cut-off events. [2024-11-09 10:56:52,090 INFO L125 PetriNetUnfolderBase]: For 59043/59121 co-relation queries the response was YES. [2024-11-09 10:56:52,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21676 conditions, 2830 events. 1344/2830 cut-off events. For 59043/59121 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18342 event pairs, 129 based on Foata normal form. 53/2829 useless extension candidates. Maximal degree in co-relation 21603. Up to 833 conditions per place. [2024-11-09 10:56:52,117 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 147 selfloop transitions, 89 changer transitions 48/355 dead transitions. [2024-11-09 10:56:52,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 355 transitions, 6285 flow [2024-11-09 10:56:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:56:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:56:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 252 transitions. [2024-11-09 10:56:52,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-09 10:56:52,118 INFO L175 Difference]: Start difference. First operand has 296 places, 244 transitions, 4339 flow. Second operand 14 states and 252 transitions. [2024-11-09 10:56:52,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 355 transitions, 6285 flow [2024-11-09 10:56:52,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 355 transitions, 5853 flow, removed 96 selfloop flow, removed 34 redundant places. [2024-11-09 10:56:52,260 INFO L231 Difference]: Finished difference. Result has 209 places, 252 transitions, 4601 flow [2024-11-09 10:56:52,260 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4601, PETRI_PLACES=209, PETRI_TRANSITIONS=252} [2024-11-09 10:56:52,260 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 169 predicate places. [2024-11-09 10:56:52,261 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 252 transitions, 4601 flow [2024-11-09 10:56:52,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.0) internal successors, (238), 17 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:52,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:52,261 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:52,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:52,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:52,461 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:56:52,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 26716015, now seen corresponding path program 10 times [2024-11-09 10:56:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:52,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733846125] [2024-11-09 10:56:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:52,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat