./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:40:26,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:40:26,792 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:40:26,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:40:26,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:40:26,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:40:26,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:40:26,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:40:26,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:40:26,825 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:40:26,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:40:26,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:40:26,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:40:26,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:40:26,829 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:40:26,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:40:26,829 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:40:26,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:40:26,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:40:26,830 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:40:26,830 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:40:26,831 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:40:26,831 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:40:26,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:40:26,831 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:40:26,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:40:26,832 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:40:26,832 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:40:26,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:40:26,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:40:26,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:40:26,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:40:26,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:40:26,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:40:26,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:40:26,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:40:26,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:40:26,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:40:26,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:40:26,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:40:26,834 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:40:26,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:40:26,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-11-22 21:40:27,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:40:27,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:40:27,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:40:27,051 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:40:27,051 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:40:27,052 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-22 21:40:28,257 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:40:28,395 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:40:28,395 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-22 21:40:28,401 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfbb1d1d0/05348eef61be45f295540da50778f783/FLAG307d20d72 [2024-11-22 21:40:28,812 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfbb1d1d0/05348eef61be45f295540da50778f783 [2024-11-22 21:40:28,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:40:28,815 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:40:28,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:40:28,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:40:28,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:40:28,820 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:40:28" (1/1) ... [2024-11-22 21:40:28,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527fb354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:28, skipping insertion in model container [2024-11-22 21:40:28,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:40:28" (1/1) ... [2024-11-22 21:40:28,838 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:40:29,004 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:40:29,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:40:29,027 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:40:29,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:40:29,092 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:40:29,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29 WrapperNode [2024-11-22 21:40:29,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:40:29,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:40:29,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:40:29,097 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:40:29,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,111 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,124 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 107 [2024-11-22 21:40:29,124 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:40:29,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:40:29,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:40:29,125 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:40:29,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,143 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 21:40:29,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,157 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,158 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,160 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:40:29,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:40:29,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:40:29,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:40:29,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (1/1) ... [2024-11-22 21:40:29,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:40:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:29,194 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) [2024-11-22 21:40:29,196 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 [2024-11-22 21:40:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:40:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:40:29,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:40:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:40:29,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:40:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:40:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:40:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:40:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:40:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:40:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:40:29,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:40:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:40:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:40:29,236 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:40:29,319 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:40:29,320 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:40:29,546 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:40:29,547 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:40:29,690 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:40:29,690 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:40:29,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:40:29 BoogieIcfgContainer [2024-11-22 21:40:29,690 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:40:29,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:40:29,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:40:29,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:40:29,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:40:28" (1/3) ... [2024-11-22 21:40:29,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b975c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:40:29, skipping insertion in model container [2024-11-22 21:40:29,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:40:29" (2/3) ... [2024-11-22 21:40:29,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b975c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:40:29, skipping insertion in model container [2024-11-22 21:40:29,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:40:29" (3/3) ... [2024-11-22 21:40:29,697 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-11-22 21:40:29,709 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:40:29,710 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-22 21:40:29,710 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:40:29,754 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:40:29,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2024-11-22 21:40:29,802 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-11-22 21:40:29,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:40:29,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-22 21:40:29,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2024-11-22 21:40:29,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2024-11-22 21:40:29,814 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:40:29,819 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;@238d4fce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:40:29,819 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-22 21:40:29,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:40:29,822 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:40:29,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:40:29,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:29,823 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:40:29,823 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:29,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash 467441, now seen corresponding path program 1 times [2024-11-22 21:40:29,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:29,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627781618] [2024-11-22 21:40:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:29,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:30,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:30,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627781618] [2024-11-22 21:40:30,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627781618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:30,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:30,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:40:30,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352848675] [2024-11-22 21:40:30,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:30,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:40:30,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:40:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:40:30,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:40:30,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-22 21:40:30,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:30,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:40:30,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:30,208 INFO L124 PetriNetUnfolderBase]: 101/218 cut-off events. [2024-11-22 21:40:30,209 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-22 21:40:30,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 218 events. 101/218 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 809 event pairs, 35 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 329. Up to 143 conditions per place. [2024-11-22 21:40:30,214 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-22 21:40:30,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 138 flow [2024-11-22 21:40:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:40:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:40:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-22 21:40:30,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-11-22 21:40:30,223 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2024-11-22 21:40:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 138 flow [2024-11-22 21:40:30,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:40:30,227 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2024-11-22 21:40:30,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2024-11-22 21:40:30,231 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-11-22 21:40:30,231 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2024-11-22 21:40:30,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-22 21:40:30,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:30,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:40:30,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:40:30,232 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:30,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash 467442, now seen corresponding path program 1 times [2024-11-22 21:40:30,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:30,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623495269] [2024-11-22 21:40:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:30,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:30,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:30,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623495269] [2024-11-22 21:40:30,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623495269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:30,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:30,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:40:30,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130444211] [2024-11-22 21:40:30,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:30,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:40:30,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:30,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:40:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:40:30,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:40:30,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-22 21:40:30,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:30,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:40:30,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:30,602 INFO L124 PetriNetUnfolderBase]: 102/221 cut-off events. [2024-11-22 21:40:30,604 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:40:30,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 221 events. 102/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 809 event pairs, 35 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 355. Up to 152 conditions per place. [2024-11-22 21:40:30,605 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-22 21:40:30,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 150 flow [2024-11-22 21:40:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:40:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:40:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-22 21:40:30,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-22 21:40:30,608 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 116 transitions. [2024-11-22 21:40:30,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 150 flow [2024-11-22 21:40:30,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:40:30,611 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 113 flow [2024-11-22 21:40:30,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-22 21:40:30,613 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2024-11-22 21:40:30,613 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 113 flow [2024-11-22 21:40:30,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-22 21:40:30,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:30,614 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:40:30,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:40:30,614 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:30,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:30,614 INFO L85 PathProgramCache]: Analyzing trace with hash 14491672, now seen corresponding path program 1 times [2024-11-22 21:40:30,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:30,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954675521] [2024-11-22 21:40:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:30,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:30,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:30,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954675521] [2024-11-22 21:40:30,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954675521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:30,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:30,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:40:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864724435] [2024-11-22 21:40:30,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:30,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:40:30,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:40:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:40:30,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:40:30,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2024-11-22 21:40:30,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:30,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:40:30,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:30,952 INFO L124 PetriNetUnfolderBase]: 103/224 cut-off events. [2024-11-22 21:40:30,953 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:40:30,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 224 events. 103/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 806 event pairs, 35 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 376. Up to 151 conditions per place. [2024-11-22 21:40:30,957 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-11-22 21:40:30,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 179 flow [2024-11-22 21:40:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:40:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:40:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-22 21:40:30,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-22 21:40:30,959 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 113 flow. Second operand 5 states and 141 transitions. [2024-11-22 21:40:30,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 179 flow [2024-11-22 21:40:30,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:40:30,961 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 147 flow [2024-11-22 21:40:30,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-22 21:40:30,962 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-22 21:40:30,962 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 147 flow [2024-11-22 21:40:30,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2024-11-22 21:40:30,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:30,964 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:40:30,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:40:30,964 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:30,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 449225612, now seen corresponding path program 1 times [2024-11-22 21:40:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:30,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520650522] [2024-11-22 21:40:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:30,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520650522] [2024-11-22 21:40:31,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520650522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240646161] [2024-11-22 21:40:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:31,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:31,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:31,140 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) [2024-11-22 21:40:31,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:40:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:31,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:40:31,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:31,264 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 [2024-11-22 21:40:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:31,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:31,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240646161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:31,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:31,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:40:31,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985167851] [2024-11-22 21:40:31,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:31,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:40:31,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:40:31,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:40:31,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:40:31,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-22 21:40:31,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:31,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:40:31,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:31,870 INFO L124 PetriNetUnfolderBase]: 103/223 cut-off events. [2024-11-22 21:40:31,870 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:40:31,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 223 events. 103/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 809 event pairs, 35 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 386. Up to 151 conditions per place. [2024-11-22 21:40:31,872 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 22 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-11-22 21:40:31,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 201 flow [2024-11-22 21:40:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:40:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:40:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-11-22 21:40:31,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-11-22 21:40:31,873 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 147 flow. Second operand 6 states and 159 transitions. [2024-11-22 21:40:31,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 201 flow [2024-11-22 21:40:31,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:40:31,875 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 156 flow [2024-11-22 21:40:31,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-22 21:40:31,875 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-22 21:40:31,876 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 156 flow [2024-11-22 21:40:31,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-22 21:40:31,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:31,876 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-22 21:40:31,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:40:32,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:32,077 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:32,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1041609111, now seen corresponding path program 1 times [2024-11-22 21:40:32,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:32,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967929813] [2024-11-22 21:40:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967929813] [2024-11-22 21:40:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967929813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:32,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843428803] [2024-11-22 21:40:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:32,261 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) [2024-11-22 21:40:32,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:40:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:32,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:40:32,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:32,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:40:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:32,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:32,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843428803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:32,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:32,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:40:32,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934927102] [2024-11-22 21:40:32,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:32,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:40:32,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:32,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:40:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:40:32,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:40:32,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 156 flow. Second operand has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-22 21:40:32,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:32,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:40:32,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:33,099 INFO L124 PetriNetUnfolderBase]: 105/228 cut-off events. [2024-11-22 21:40:33,099 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-22 21:40:33,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 228 events. 105/228 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 35 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 394. Up to 144 conditions per place. [2024-11-22 21:40:33,103 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 16 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-11-22 21:40:33,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 253 flow [2024-11-22 21:40:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:40:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:40:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-11-22 21:40:33,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-22 21:40:33,106 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 156 flow. Second operand 9 states and 234 transitions. [2024-11-22 21:40:33,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 253 flow [2024-11-22 21:40:33,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 206 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-22 21:40:33,109 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 174 flow [2024-11-22 21:40:33,109 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-11-22 21:40:33,110 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-22 21:40:33,110 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 174 flow [2024-11-22 21:40:33,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-22 21:40:33,111 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:33,111 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:33,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:40:33,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:33,316 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:33,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2067205011, now seen corresponding path program 1 times [2024-11-22 21:40:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:33,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509801436] [2024-11-22 21:40:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:33,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:33,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509801436] [2024-11-22 21:40:33,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509801436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:33,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:33,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:40:33,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849750021] [2024-11-22 21:40:33,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:33,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:40:33,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:33,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:40:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:40:33,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:40:33,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-11-22 21:40:33,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:33,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:40:33,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:33,459 INFO L124 PetriNetUnfolderBase]: 165/384 cut-off events. [2024-11-22 21:40:33,459 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:40:33,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 384 events. 165/384 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1806 event pairs, 71 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 421. Up to 175 conditions per place. [2024-11-22 21:40:33,461 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 52 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-22 21:40:33,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 374 flow [2024-11-22 21:40:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:40:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:40:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-22 21:40:33,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-11-22 21:40:33,462 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 174 flow. Second operand 5 states and 161 transitions. [2024-11-22 21:40:33,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 374 flow [2024-11-22 21:40:33,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 321 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-22 21:40:33,464 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 170 flow [2024-11-22 21:40:33,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2024-11-22 21:40:33,464 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-22 21:40:33,464 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 170 flow [2024-11-22 21:40:33,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-11-22 21:40:33,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:33,465 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:33,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:40:33,465 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:33,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1247418631, now seen corresponding path program 1 times [2024-11-22 21:40:33,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:33,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868515613] [2024-11-22 21:40:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:33,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:33,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:33,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868515613] [2024-11-22 21:40:33,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868515613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:33,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:33,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:40:33,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152606011] [2024-11-22 21:40:33,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:33,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:40:33,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:40:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:40:33,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:40:33,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-22 21:40:33,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:33,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:40:33,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:33,615 INFO L124 PetriNetUnfolderBase]: 263/630 cut-off events. [2024-11-22 21:40:33,615 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-22 21:40:33,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 630 events. 263/630 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3542 event pairs, 123 based on Foata normal form. 9/432 useless extension candidates. Maximal degree in co-relation 672. Up to 263 conditions per place. [2024-11-22 21:40:33,619 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 42 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-22 21:40:33,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 300 flow [2024-11-22 21:40:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:40:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:40:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-22 21:40:33,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-22 21:40:33,620 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 170 flow. Second operand 5 states and 155 transitions. [2024-11-22 21:40:33,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 300 flow [2024-11-22 21:40:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:40:33,624 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 185 flow [2024-11-22 21:40:33,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-22 21:40:33,626 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-22 21:40:33,626 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 185 flow [2024-11-22 21:40:33,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-22 21:40:33,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:33,626 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:33,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:40:33,626 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:33,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1979191576, now seen corresponding path program 1 times [2024-11-22 21:40:33,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:33,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104938734] [2024-11-22 21:40:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:33,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:33,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104938734] [2024-11-22 21:40:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104938734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:33,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:33,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:40:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783583741] [2024-11-22 21:40:33,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:33,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:40:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:40:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:40:33,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-22 21:40:33,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-22 21:40:33,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:33,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-22 21:40:33,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:33,773 INFO L124 PetriNetUnfolderBase]: 289/658 cut-off events. [2024-11-22 21:40:33,774 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-22 21:40:33,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 658 events. 289/658 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3683 event pairs, 162 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 519. Up to 475 conditions per place. [2024-11-22 21:40:33,777 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 33 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-11-22 21:40:33,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 257 flow [2024-11-22 21:40:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:40:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:40:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-22 21:40:33,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-22 21:40:33,778 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 185 flow. Second operand 4 states and 98 transitions. [2024-11-22 21:40:33,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 257 flow [2024-11-22 21:40:33,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:40:33,779 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 184 flow [2024-11-22 21:40:33,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-22 21:40:33,780 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2024-11-22 21:40:33,780 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 184 flow [2024-11-22 21:40:33,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-22 21:40:33,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:33,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:33,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:40:33,780 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:33,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1979191577, now seen corresponding path program 1 times [2024-11-22 21:40:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:33,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306294759] [2024-11-22 21:40:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:33,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:40:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306294759] [2024-11-22 21:40:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306294759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:33,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:33,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:40:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143470607] [2024-11-22 21:40:33,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:33,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:40:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:40:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:40:33,839 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:40:33,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-22 21:40:33,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:33,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:40:33,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:33,911 INFO L124 PetriNetUnfolderBase]: 215/441 cut-off events. [2024-11-22 21:40:33,911 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-22 21:40:33,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 441 events. 215/441 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2141 event pairs, 124 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 482. Up to 274 conditions per place. [2024-11-22 21:40:33,913 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-22 21:40:33,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 352 flow [2024-11-22 21:40:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:40:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:40:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-11-22 21:40:33,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-22 21:40:33,914 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 184 flow. Second operand 5 states and 159 transitions. [2024-11-22 21:40:33,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 352 flow [2024-11-22 21:40:33,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:40:33,915 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 192 flow [2024-11-22 21:40:33,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-11-22 21:40:33,916 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-11-22 21:40:33,916 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 192 flow [2024-11-22 21:40:33,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-22 21:40:33,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:33,916 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:33,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:40:33,917 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:33,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2071010136, now seen corresponding path program 1 times [2024-11-22 21:40:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:33,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676974519] [2024-11-22 21:40:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:33,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676974519] [2024-11-22 21:40:33,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676974519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:33,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:33,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:40:33,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821932153] [2024-11-22 21:40:33,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:33,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:40:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:40:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:40:34,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-22 21:40:34,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-22 21:40:34,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:34,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-22 21:40:34,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:34,068 INFO L124 PetriNetUnfolderBase]: 227/522 cut-off events. [2024-11-22 21:40:34,068 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-22 21:40:34,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 522 events. 227/522 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2690 event pairs, 138 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 766. Up to 389 conditions per place. [2024-11-22 21:40:34,071 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 30 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2024-11-22 21:40:34,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 264 flow [2024-11-22 21:40:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:40:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:40:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-22 21:40:34,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-22 21:40:34,072 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 192 flow. Second operand 5 states and 116 transitions. [2024-11-22 21:40:34,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 264 flow [2024-11-22 21:40:34,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:40:34,073 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 196 flow [2024-11-22 21:40:34,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-22 21:40:34,074 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2024-11-22 21:40:34,074 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 196 flow [2024-11-22 21:40:34,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-22 21:40:34,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:34,074 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:34,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:40:34,075 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:34,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2071010135, now seen corresponding path program 1 times [2024-11-22 21:40:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:34,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071480020] [2024-11-22 21:40:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:34,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:34,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071480020] [2024-11-22 21:40:34,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071480020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:34,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318867149] [2024-11-22 21:40:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:34,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:34,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:34,223 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) [2024-11-22 21:40:34,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:40:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:34,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:40:34,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:34,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:40:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:40:34,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:40:34,341 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:40:34,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:40:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:34,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:34,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-22 21:40:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:34,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318867149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:34,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:34,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:40:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874318794] [2024-11-22 21:40:34,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:34,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:40:34,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:40:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:40:34,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:40:34,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 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) [2024-11-22 21:40:34,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:34,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:40:34,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:35,146 INFO L124 PetriNetUnfolderBase]: 325/708 cut-off events. [2024-11-22 21:40:35,147 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-22 21:40:35,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 708 events. 325/708 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3671 event pairs, 147 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 858. Up to 233 conditions per place. [2024-11-22 21:40:35,149 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 57 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-11-22 21:40:35,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 435 flow [2024-11-22 21:40:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:40:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:40:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-11-22 21:40:35,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-22 21:40:35,151 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 196 flow. Second operand 8 states and 224 transitions. [2024-11-22 21:40:35,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 435 flow [2024-11-22 21:40:35,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:40:35,152 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 245 flow [2024-11-22 21:40:35,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-11-22 21:40:35,153 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2024-11-22 21:40:35,153 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 245 flow [2024-11-22 21:40:35,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 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) [2024-11-22 21:40:35,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:35,154 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:35,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 21:40:35,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:35,356 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:35,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash 466777907, now seen corresponding path program 1 times [2024-11-22 21:40:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:35,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254955181] [2024-11-22 21:40:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:35,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:35,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254955181] [2024-11-22 21:40:35,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254955181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:40:35,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:40:35,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:40:35,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194482943] [2024-11-22 21:40:35,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:40:35,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:40:35,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:40:35,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:40:35,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:40:35,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-11-22 21:40:35,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:35,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:40:35,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:35,532 INFO L124 PetriNetUnfolderBase]: 361/779 cut-off events. [2024-11-22 21:40:35,533 INFO L125 PetriNetUnfolderBase]: For 201/215 co-relation queries the response was YES. [2024-11-22 21:40:35,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 779 events. 361/779 cut-off events. For 201/215 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4063 event pairs, 162 based on Foata normal form. 5/667 useless extension candidates. Maximal degree in co-relation 1188. Up to 305 conditions per place. [2024-11-22 21:40:35,536 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 56 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-11-22 21:40:35,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 440 flow [2024-11-22 21:40:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:40:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:40:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-22 21:40:35,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-22 21:40:35,537 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 245 flow. Second operand 5 states and 166 transitions. [2024-11-22 21:40:35,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 440 flow [2024-11-22 21:40:35,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 422 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:40:35,539 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 260 flow [2024-11-22 21:40:35,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-22 21:40:35,539 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2024-11-22 21:40:35,539 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 260 flow [2024-11-22 21:40:35,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-11-22 21:40:35,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:35,539 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:35,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 21:40:35,540 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:35,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 223195645, now seen corresponding path program 1 times [2024-11-22 21:40:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146976077] [2024-11-22 21:40:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:35,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146976077] [2024-11-22 21:40:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146976077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478668887] [2024-11-22 21:40:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:35,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:35,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:35,657 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) [2024-11-22 21:40:35,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:40:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:35,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:40:35,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:35,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:35,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:40:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:35,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478668887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:35,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:35,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-22 21:40:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983140458] [2024-11-22 21:40:35,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:35,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:40:35,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:35,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:40:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:40:36,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:40:36,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 260 flow. Second operand has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 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) [2024-11-22 21:40:36,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:36,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:40:36,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:36,241 INFO L124 PetriNetUnfolderBase]: 375/764 cut-off events. [2024-11-22 21:40:36,242 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-22 21:40:36,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 764 events. 375/764 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3734 event pairs, 130 based on Foata normal form. 0/692 useless extension candidates. Maximal degree in co-relation 1272. Up to 226 conditions per place. [2024-11-22 21:40:36,244 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 65 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-11-22 21:40:36,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 516 flow [2024-11-22 21:40:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:40:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:40:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-11-22 21:40:36,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-11-22 21:40:36,245 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 260 flow. Second operand 7 states and 222 transitions. [2024-11-22 21:40:36,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 516 flow [2024-11-22 21:40:36,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 505 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:40:36,247 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 296 flow [2024-11-22 21:40:36,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-22 21:40:36,248 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2024-11-22 21:40:36,248 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 296 flow [2024-11-22 21:40:36,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 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) [2024-11-22 21:40:36,248 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:36,248 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:36,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:40:36,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:36,449 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:36,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1677533548, now seen corresponding path program 1 times [2024-11-22 21:40:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014131] [2024-11-22 21:40:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:36,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:36,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014131] [2024-11-22 21:40:36,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:36,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797298367] [2024-11-22 21:40:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:36,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:36,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:36,545 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) [2024-11-22 21:40:36,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:40:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:36,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:40:36,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:36,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:36,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:40:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:36,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797298367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:36,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:36,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-22 21:40:36,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323310321] [2024-11-22 21:40:36,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:36,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:40:36,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:36,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:40:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:40:36,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:40:36,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 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) [2024-11-22 21:40:36,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:36,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:40:36,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:37,149 INFO L124 PetriNetUnfolderBase]: 429/888 cut-off events. [2024-11-22 21:40:37,149 INFO L125 PetriNetUnfolderBase]: For 881/941 co-relation queries the response was YES. [2024-11-22 21:40:37,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 888 events. 429/888 cut-off events. For 881/941 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4591 event pairs, 162 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 1546. Up to 288 conditions per place. [2024-11-22 21:40:37,153 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 61 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-11-22 21:40:37,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 552 flow [2024-11-22 21:40:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:40:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:40:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-22 21:40:37,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2024-11-22 21:40:37,154 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 296 flow. Second operand 7 states and 218 transitions. [2024-11-22 21:40:37,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 552 flow [2024-11-22 21:40:37,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 531 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:40:37,156 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 322 flow [2024-11-22 21:40:37,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2024-11-22 21:40:37,157 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2024-11-22 21:40:37,157 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 322 flow [2024-11-22 21:40:37,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 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) [2024-11-22 21:40:37,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:37,158 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:37,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:40:37,358 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,SelfDestructingSolverStorable13 [2024-11-22 21:40:37,359 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:37,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -463932034, now seen corresponding path program 1 times [2024-11-22 21:40:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:37,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902547527] [2024-11-22 21:40:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:37,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:37,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:37,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902547527] [2024-11-22 21:40:37,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902547527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:37,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028364379] [2024-11-22 21:40:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:37,505 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) [2024-11-22 21:40:37,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:40:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:37,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:40:37,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:37,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:40:37,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:40:37,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:40:37,610 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:40:37,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:40:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:37,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:37,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-22 21:40:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:37,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028364379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:37,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:37,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:40:37,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104417787] [2024-11-22 21:40:37,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:37,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:40:37,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:37,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:40:37,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:40:41,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:40:45,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:40:49,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:40:54,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:40:58,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:40:58,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-22 21:40:58,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 322 flow. Second operand has 11 states, 11 states have (on average 18.0) internal successors, (198), 11 states have internal predecessors, (198), 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) [2024-11-22 21:40:58,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:58,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-22 21:40:58,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:58,280 INFO L124 PetriNetUnfolderBase]: 429/835 cut-off events. [2024-11-22 21:40:58,280 INFO L125 PetriNetUnfolderBase]: For 901/961 co-relation queries the response was YES. [2024-11-22 21:40:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 835 events. 429/835 cut-off events. For 901/961 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4122 event pairs, 230 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 1531. Up to 323 conditions per place. [2024-11-22 21:40:58,283 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 58 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2024-11-22 21:40:58,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 572 flow [2024-11-22 21:40:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:40:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:40:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-11-22 21:40:58,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2024-11-22 21:40:58,285 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 322 flow. Second operand 8 states and 182 transitions. [2024-11-22 21:40:58,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 572 flow [2024-11-22 21:40:58,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 539 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-22 21:40:58,287 INFO L231 Difference]: Finished difference. Result has 80 places, 57 transitions, 336 flow [2024-11-22 21:40:58,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=80, PETRI_TRANSITIONS=57} [2024-11-22 21:40:58,289 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-11-22 21:40:58,289 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 57 transitions, 336 flow [2024-11-22 21:40:58,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.0) internal successors, (198), 11 states have internal predecessors, (198), 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) [2024-11-22 21:40:58,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:58,289 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:58,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:40:58,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 21:40:58,494 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:58,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash 612475950, now seen corresponding path program 1 times [2024-11-22 21:40:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:58,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726252459] [2024-11-22 21:40:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:58,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:58,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:58,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726252459] [2024-11-22 21:40:58,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726252459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:58,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688716380] [2024-11-22 21:40:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:58,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:58,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:58,561 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) [2024-11-22 21:40:58,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:40:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:58,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:40:58,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:58,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:58,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688716380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:58,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:58,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-11-22 21:40:58,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105568278] [2024-11-22 21:40:58,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:58,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:40:58,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:40:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:40:58,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:40:58,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 57 transitions, 336 flow. Second operand has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2024-11-22 21:40:58,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:58,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:40:58,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:40:59,254 INFO L124 PetriNetUnfolderBase]: 1085/2176 cut-off events. [2024-11-22 21:40:59,255 INFO L125 PetriNetUnfolderBase]: For 3132/3345 co-relation queries the response was YES. [2024-11-22 21:40:59,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 2176 events. 1085/2176 cut-off events. For 3132/3345 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13912 event pairs, 674 based on Foata normal form. 54/2067 useless extension candidates. Maximal degree in co-relation 2910. Up to 553 conditions per place. [2024-11-22 21:40:59,264 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 158 selfloop transitions, 32 changer transitions 0/206 dead transitions. [2024-11-22 21:40:59,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 206 transitions, 1242 flow [2024-11-22 21:40:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 21:40:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-22 21:40:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 806 transitions. [2024-11-22 21:40:59,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6219135802469136 [2024-11-22 21:40:59,267 INFO L175 Difference]: Start difference. First operand has 80 places, 57 transitions, 336 flow. Second operand 27 states and 806 transitions. [2024-11-22 21:40:59,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 206 transitions, 1242 flow [2024-11-22 21:40:59,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 206 transitions, 1212 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:40:59,270 INFO L231 Difference]: Finished difference. Result has 105 places, 70 transitions, 496 flow [2024-11-22 21:40:59,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=105, PETRI_TRANSITIONS=70} [2024-11-22 21:40:59,271 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-11-22 21:40:59,271 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 70 transitions, 496 flow [2024-11-22 21:40:59,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2024-11-22 21:40:59,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:40:59,271 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:40:59,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:40:59,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:59,472 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:40:59,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:40:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash 205935513, now seen corresponding path program 1 times [2024-11-22 21:40:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:40:59,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818645805] [2024-11-22 21:40:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:40:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:59,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:40:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818645805] [2024-11-22 21:40:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818645805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:40:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910118287] [2024-11-22 21:40:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:40:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:40:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:40:59,541 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) [2024-11-22 21:40:59,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:40:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:40:59,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:40:59,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:40:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:59,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:40:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:40:59,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910118287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:40:59,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:40:59,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-22 21:40:59,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408274734] [2024-11-22 21:40:59,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:40:59,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:40:59,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:40:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:40:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:40:59,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:40:59,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 70 transitions, 496 flow. Second operand has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 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) [2024-11-22 21:40:59,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:40:59,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:40:59,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:00,285 INFO L124 PetriNetUnfolderBase]: 901/1846 cut-off events. [2024-11-22 21:41:00,285 INFO L125 PetriNetUnfolderBase]: For 3446/3672 co-relation queries the response was YES. [2024-11-22 21:41:00,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4720 conditions, 1846 events. 901/1846 cut-off events. For 3446/3672 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11490 event pairs, 413 based on Foata normal form. 42/1797 useless extension candidates. Maximal degree in co-relation 2552. Up to 320 conditions per place. [2024-11-22 21:41:00,295 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 172 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2024-11-22 21:41:00,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 1341 flow [2024-11-22 21:41:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 21:41:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 21:41:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 800 transitions. [2024-11-22 21:41:00,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-11-22 21:41:00,297 INFO L175 Difference]: Start difference. First operand has 105 places, 70 transitions, 496 flow. Second operand 26 states and 800 transitions. [2024-11-22 21:41:00,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 1341 flow [2024-11-22 21:41:00,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 1318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:00,301 INFO L231 Difference]: Finished difference. Result has 128 places, 76 transitions, 591 flow [2024-11-22 21:41:00,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=591, PETRI_PLACES=128, PETRI_TRANSITIONS=76} [2024-11-22 21:41:00,302 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 82 predicate places. [2024-11-22 21:41:00,302 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 76 transitions, 591 flow [2024-11-22 21:41:00,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 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) [2024-11-22 21:41:00,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:00,302 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:00,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:41:00,503 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,SelfDestructingSolverStorable16 [2024-11-22 21:41:00,503 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:00,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 251945921, now seen corresponding path program 1 times [2024-11-22 21:41:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278624575] [2024-11-22 21:41:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:00,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:00,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278624575] [2024-11-22 21:41:00,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278624575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:00,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:00,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:41:00,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556926304] [2024-11-22 21:41:00,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:00,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:41:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:41:00,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:41:00,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-11-22 21:41:00,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 76 transitions, 591 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-22 21:41:00,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:00,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-11-22 21:41:00,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:00,695 INFO L124 PetriNetUnfolderBase]: 783/1640 cut-off events. [2024-11-22 21:41:00,695 INFO L125 PetriNetUnfolderBase]: For 4055/4310 co-relation queries the response was YES. [2024-11-22 21:41:00,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4311 conditions, 1640 events. 783/1640 cut-off events. For 4055/4310 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10035 event pairs, 293 based on Foata normal form. 9/1542 useless extension candidates. Maximal degree in co-relation 2223. Up to 904 conditions per place. [2024-11-22 21:41:00,702 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 56 selfloop transitions, 9 changer transitions 13/95 dead transitions. [2024-11-22 21:41:00,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 95 transitions, 874 flow [2024-11-22 21:41:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:41:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:41:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-22 21:41:00,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-22 21:41:00,703 INFO L175 Difference]: Start difference. First operand has 128 places, 76 transitions, 591 flow. Second operand 3 states and 108 transitions. [2024-11-22 21:41:00,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 95 transitions, 874 flow [2024-11-22 21:41:00,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 95 transitions, 841 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-22 21:41:00,706 INFO L231 Difference]: Finished difference. Result has 121 places, 72 transitions, 563 flow [2024-11-22 21:41:00,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=563, PETRI_PLACES=121, PETRI_TRANSITIONS=72} [2024-11-22 21:41:00,706 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-11-22 21:41:00,707 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 72 transitions, 563 flow [2024-11-22 21:41:00,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-22 21:41:00,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:00,707 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:00,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:41:00,707 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:00,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:00,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1015357225, now seen corresponding path program 2 times [2024-11-22 21:41:00,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:00,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462378473] [2024-11-22 21:41:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:00,721 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:00,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:41:00,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:00,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462378473] [2024-11-22 21:41:00,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462378473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:00,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873475919] [2024-11-22 21:41:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:00,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:00,881 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) [2024-11-22 21:41:00,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:41:00,942 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:00,942 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:00,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:41:00,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:00,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:41:01,026 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:41:01,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-22 21:41:01,037 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:41:01,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:41:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:01,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:01,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-22 21:41:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:01,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873475919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:01,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:01,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 16 [2024-11-22 21:41:01,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332688433] [2024-11-22 21:41:01,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:01,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:41:01,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:01,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:41:01,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:41:05,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:41:05,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-22 21:41:05,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 72 transitions, 563 flow. Second operand has 18 states, 18 states have (on average 21.5) internal successors, (387), 18 states have internal predecessors, (387), 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) [2024-11-22 21:41:05,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:05,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-22 21:41:05,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:06,616 INFO L124 PetriNetUnfolderBase]: 1182/2287 cut-off events. [2024-11-22 21:41:06,617 INFO L125 PetriNetUnfolderBase]: For 6905/7118 co-relation queries the response was YES. [2024-11-22 21:41:06,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6601 conditions, 2287 events. 1182/2287 cut-off events. For 6905/7118 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14020 event pairs, 332 based on Foata normal form. 40/2225 useless extension candidates. Maximal degree in co-relation 4242. Up to 486 conditions per place. [2024-11-22 21:41:06,629 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 104 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-11-22 21:41:06,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 142 transitions, 1102 flow [2024-11-22 21:41:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 21:41:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 21:41:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 438 transitions. [2024-11-22 21:41:06,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-11-22 21:41:06,631 INFO L175 Difference]: Start difference. First operand has 121 places, 72 transitions, 563 flow. Second operand 17 states and 438 transitions. [2024-11-22 21:41:06,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 142 transitions, 1102 flow [2024-11-22 21:41:06,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 995 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-11-22 21:41:06,636 INFO L231 Difference]: Finished difference. Result has 105 places, 75 transitions, 572 flow [2024-11-22 21:41:06,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=572, PETRI_PLACES=105, PETRI_TRANSITIONS=75} [2024-11-22 21:41:06,637 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-11-22 21:41:06,637 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 75 transitions, 572 flow [2024-11-22 21:41:06,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.5) internal successors, (387), 18 states have internal predecessors, (387), 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) [2024-11-22 21:41:06,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:06,637 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:06,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:41:06,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:06,838 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:06,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1411303293, now seen corresponding path program 1 times [2024-11-22 21:41:06,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:06,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492177282] [2024-11-22 21:41:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:06,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492177282] [2024-11-22 21:41:07,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492177282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755553323] [2024-11-22 21:41:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:07,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:07,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:07,029 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) [2024-11-22 21:41:07,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:41:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:07,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:41:07,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:07,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:07,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-22 21:41:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:07,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755553323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:07,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:07,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-22 21:41:07,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606593584] [2024-11-22 21:41:07,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:07,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:41:07,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:41:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:41:07,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-22 21:41:07,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 75 transitions, 572 flow. Second operand has 19 states, 19 states have (on average 23.894736842105264) internal successors, (454), 19 states have internal predecessors, (454), 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) [2024-11-22 21:41:07,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:07,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-22 21:41:07,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:08,016 INFO L124 PetriNetUnfolderBase]: 1098/2140 cut-off events. [2024-11-22 21:41:08,017 INFO L125 PetriNetUnfolderBase]: For 4621/4823 co-relation queries the response was YES. [2024-11-22 21:41:08,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 2140 events. 1098/2140 cut-off events. For 4621/4823 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13282 event pairs, 339 based on Foata normal form. 22/2056 useless extension candidates. Maximal degree in co-relation 2866. Up to 462 conditions per place. [2024-11-22 21:41:08,031 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 101 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-11-22 21:41:08,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 141 transitions, 1046 flow [2024-11-22 21:41:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:41:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:41:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 323 transitions. [2024-11-22 21:41:08,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6729166666666667 [2024-11-22 21:41:08,033 INFO L175 Difference]: Start difference. First operand has 105 places, 75 transitions, 572 flow. Second operand 10 states and 323 transitions. [2024-11-22 21:41:08,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 141 transitions, 1046 flow [2024-11-22 21:41:08,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1004 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-11-22 21:41:08,040 INFO L231 Difference]: Finished difference. Result has 108 places, 77 transitions, 611 flow [2024-11-22 21:41:08,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=611, PETRI_PLACES=108, PETRI_TRANSITIONS=77} [2024-11-22 21:41:08,040 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2024-11-22 21:41:08,040 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 77 transitions, 611 flow [2024-11-22 21:41:08,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.894736842105264) internal successors, (454), 19 states have internal predecessors, (454), 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) [2024-11-22 21:41:08,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:08,041 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:08,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:08,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:08,241 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:08,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash 827784148, now seen corresponding path program 2 times [2024-11-22 21:41:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:08,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233962846] [2024-11-22 21:41:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:08,258 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:08,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:41:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233962846] [2024-11-22 21:41:08,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233962846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280692357] [2024-11-22 21:41:08,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:08,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:08,461 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) [2024-11-22 21:41:08,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:41:08,525 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:08,525 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:08,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:41:08,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:08,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:08,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-22 21:41:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:08,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280692357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:08,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:08,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-22 21:41:08,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136086135] [2024-11-22 21:41:08,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:08,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:41:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:41:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:41:09,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-11-22 21:41:09,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 77 transitions, 611 flow. Second operand has 19 states, 19 states have (on average 23.57894736842105) internal successors, (448), 19 states have internal predecessors, (448), 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) [2024-11-22 21:41:09,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:09,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-11-22 21:41:09,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:09,737 INFO L124 PetriNetUnfolderBase]: 1644/3226 cut-off events. [2024-11-22 21:41:09,737 INFO L125 PetriNetUnfolderBase]: For 9625/9943 co-relation queries the response was YES. [2024-11-22 21:41:09,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8951 conditions, 3226 events. 1644/3226 cut-off events. For 9625/9943 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 21824 event pairs, 491 based on Foata normal form. 62/3226 useless extension candidates. Maximal degree in co-relation 4958. Up to 706 conditions per place. [2024-11-22 21:41:09,751 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 100 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-11-22 21:41:09,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 141 transitions, 1164 flow [2024-11-22 21:41:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:41:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:41:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 393 transitions. [2024-11-22 21:41:09,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2024-11-22 21:41:09,753 INFO L175 Difference]: Start difference. First operand has 108 places, 77 transitions, 611 flow. Second operand 14 states and 393 transitions. [2024-11-22 21:41:09,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 141 transitions, 1164 flow [2024-11-22 21:41:09,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 141 transitions, 1120 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-22 21:41:09,759 INFO L231 Difference]: Finished difference. Result has 117 places, 79 transitions, 653 flow [2024-11-22 21:41:09,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=653, PETRI_PLACES=117, PETRI_TRANSITIONS=79} [2024-11-22 21:41:09,759 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2024-11-22 21:41:09,759 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 79 transitions, 653 flow [2024-11-22 21:41:09,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.57894736842105) internal successors, (448), 19 states have internal predecessors, (448), 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) [2024-11-22 21:41:09,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:09,760 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:09,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:41:09,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:41:09,964 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:09,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -108494786, now seen corresponding path program 1 times [2024-11-22 21:41:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:09,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020658889] [2024-11-22 21:41:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:09,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:10,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020658889] [2024-11-22 21:41:10,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020658889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:10,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130918092] [2024-11-22 21:41:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:10,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:10,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:10,140 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) [2024-11-22 21:41:10,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:41:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:10,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:41:10,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:10,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:41:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:41:10,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:41:10,264 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:41:10,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:41:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:10,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:10,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-22 21:41:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:41:10,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130918092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:10,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:10,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:41:10,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128067256] [2024-11-22 21:41:10,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:10,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:41:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:41:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:41:10,912 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:10,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 79 transitions, 653 flow. Second operand has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 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) [2024-11-22 21:41:10,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:10,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:10,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:11,370 INFO L124 PetriNetUnfolderBase]: 1508/2928 cut-off events. [2024-11-22 21:41:11,370 INFO L125 PetriNetUnfolderBase]: For 9515/9767 co-relation queries the response was YES. [2024-11-22 21:41:11,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8137 conditions, 2928 events. 1508/2928 cut-off events. For 9515/9767 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19850 event pairs, 712 based on Foata normal form. 31/2830 useless extension candidates. Maximal degree in co-relation 6749. Up to 924 conditions per place. [2024-11-22 21:41:11,380 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 79 selfloop transitions, 25 changer transitions 0/122 dead transitions. [2024-11-22 21:41:11,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 122 transitions, 1092 flow [2024-11-22 21:41:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:41:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:41:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-11-22 21:41:11,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5700757575757576 [2024-11-22 21:41:11,381 INFO L175 Difference]: Start difference. First operand has 117 places, 79 transitions, 653 flow. Second operand 11 states and 301 transitions. [2024-11-22 21:41:11,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 122 transitions, 1092 flow [2024-11-22 21:41:11,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 122 transitions, 1050 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-22 21:41:11,388 INFO L231 Difference]: Finished difference. Result has 121 places, 81 transitions, 692 flow [2024-11-22 21:41:11,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=692, PETRI_PLACES=121, PETRI_TRANSITIONS=81} [2024-11-22 21:41:11,388 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-11-22 21:41:11,388 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 81 transitions, 692 flow [2024-11-22 21:41:11,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 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) [2024-11-22 21:41:11,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:11,389 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:11,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:41:11,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-22 21:41:11,589 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:11,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:11,590 INFO L85 PathProgramCache]: Analyzing trace with hash 285030552, now seen corresponding path program 2 times [2024-11-22 21:41:11,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:11,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843334514] [2024-11-22 21:41:11,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:11,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:11,605 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:41:11,605 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 21:41:11,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843334514] [2024-11-22 21:41:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843334514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159138993] [2024-11-22 21:41:11,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:11,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:11,728 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) [2024-11-22 21:41:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:41:11,797 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:41:11,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:11,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:41:11,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:11,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:41:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 21:41:12,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 21:41:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159138993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:12,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:12,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-22 21:41:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246987893] [2024-11-22 21:41:12,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:12,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:41:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:41:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:41:12,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:12,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 81 transitions, 692 flow. Second operand has 16 states, 16 states have (on average 22.75) internal successors, (364), 16 states have internal predecessors, (364), 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) [2024-11-22 21:41:12,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:12,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:12,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:13,127 INFO L124 PetriNetUnfolderBase]: 1924/3626 cut-off events. [2024-11-22 21:41:13,128 INFO L125 PetriNetUnfolderBase]: For 9042/9217 co-relation queries the response was YES. [2024-11-22 21:41:13,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10613 conditions, 3626 events. 1924/3626 cut-off events. For 9042/9217 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24461 event pairs, 677 based on Foata normal form. 28/3436 useless extension candidates. Maximal degree in co-relation 8745. Up to 1579 conditions per place. [2024-11-22 21:41:13,138 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 75 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-11-22 21:41:13,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 110 transitions, 1138 flow [2024-11-22 21:41:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:41:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:41:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-11-22 21:41:13,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-11-22 21:41:13,139 INFO L175 Difference]: Start difference. First operand has 121 places, 81 transitions, 692 flow. Second operand 7 states and 184 transitions. [2024-11-22 21:41:13,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 110 transitions, 1138 flow [2024-11-22 21:41:13,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 110 transitions, 1096 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-22 21:41:13,147 INFO L231 Difference]: Finished difference. Result has 118 places, 80 transitions, 688 flow [2024-11-22 21:41:13,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=118, PETRI_TRANSITIONS=80} [2024-11-22 21:41:13,148 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2024-11-22 21:41:13,148 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 80 transitions, 688 flow [2024-11-22 21:41:13,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.75) internal successors, (364), 16 states have internal predecessors, (364), 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) [2024-11-22 21:41:13,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:13,148 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] [2024-11-22 21:41:13,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:13,352 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,SelfDestructingSolverStorable22 [2024-11-22 21:41:13,353 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:13,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:13,354 INFO L85 PathProgramCache]: Analyzing trace with hash 826211751, now seen corresponding path program 1 times [2024-11-22 21:41:13,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:13,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068853310] [2024-11-22 21:41:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:13,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068853310] [2024-11-22 21:41:13,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068853310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:13,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643153396] [2024-11-22 21:41:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:13,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:13,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:13,463 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) [2024-11-22 21:41:13,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:41:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:13,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:41:13,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:13,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:13,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643153396] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:13,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:41:13,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 15 [2024-11-22 21:41:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137532742] [2024-11-22 21:41:13,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:13,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:41:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:41:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:41:13,714 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:41:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 80 transitions, 688 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-22 21:41:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:41:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:13,945 INFO L124 PetriNetUnfolderBase]: 1363/2825 cut-off events. [2024-11-22 21:41:13,945 INFO L125 PetriNetUnfolderBase]: For 10132/10385 co-relation queries the response was YES. [2024-11-22 21:41:13,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8392 conditions, 2825 events. 1363/2825 cut-off events. For 10132/10385 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20033 event pairs, 477 based on Foata normal form. 69/2714 useless extension candidates. Maximal degree in co-relation 7030. Up to 997 conditions per place. [2024-11-22 21:41:13,955 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 66 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-11-22 21:41:13,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 103 transitions, 980 flow [2024-11-22 21:41:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:41:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:41:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-11-22 21:41:13,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-22 21:41:13,958 INFO L175 Difference]: Start difference. First operand has 118 places, 80 transitions, 688 flow. Second operand 7 states and 208 transitions. [2024-11-22 21:41:13,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 103 transitions, 980 flow [2024-11-22 21:41:13,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 103 transitions, 926 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:13,965 INFO L231 Difference]: Finished difference. Result has 120 places, 81 transitions, 715 flow [2024-11-22 21:41:13,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=715, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2024-11-22 21:41:13,965 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 74 predicate places. [2024-11-22 21:41:13,965 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 715 flow [2024-11-22 21:41:13,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-22 21:41:13,965 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:13,966 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] [2024-11-22 21:41:13,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 21:41:14,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:14,170 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:14,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:14,170 INFO L85 PathProgramCache]: Analyzing trace with hash 655182661, now seen corresponding path program 1 times [2024-11-22 21:41:14,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:14,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307653658] [2024-11-22 21:41:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:14,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307653658] [2024-11-22 21:41:14,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307653658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647722177] [2024-11-22 21:41:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:14,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:14,274 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:14,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:41:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:14,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:41:14,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:14,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:14,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647722177] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:14,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:41:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2024-11-22 21:41:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771427251] [2024-11-22 21:41:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:14,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:41:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:41:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:41:14,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-22 21:41:14,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 715 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-22 21:41:14,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:14,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-22 21:41:14,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:14,680 INFO L124 PetriNetUnfolderBase]: 1094/2317 cut-off events. [2024-11-22 21:41:14,680 INFO L125 PetriNetUnfolderBase]: For 11482/11828 co-relation queries the response was YES. [2024-11-22 21:41:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7390 conditions, 2317 events. 1094/2317 cut-off events. For 11482/11828 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15882 event pairs, 407 based on Foata normal form. 74/2271 useless extension candidates. Maximal degree in co-relation 5808. Up to 848 conditions per place. [2024-11-22 21:41:14,689 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 70 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-11-22 21:41:14,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 108 transitions, 1040 flow [2024-11-22 21:41:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:41:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:41:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-11-22 21:41:14,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-22 21:41:14,690 INFO L175 Difference]: Start difference. First operand has 120 places, 81 transitions, 715 flow. Second operand 7 states and 212 transitions. [2024-11-22 21:41:14,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 108 transitions, 1040 flow [2024-11-22 21:41:14,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 108 transitions, 1006 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-22 21:41:14,697 INFO L231 Difference]: Finished difference. Result has 123 places, 82 transitions, 757 flow [2024-11-22 21:41:14,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=757, PETRI_PLACES=123, PETRI_TRANSITIONS=82} [2024-11-22 21:41:14,698 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2024-11-22 21:41:14,698 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 82 transitions, 757 flow [2024-11-22 21:41:14,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-22 21:41:14,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:14,698 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:14,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 21:41:14,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:14,899 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:14,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 91245529, now seen corresponding path program 2 times [2024-11-22 21:41:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:14,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534578656] [2024-11-22 21:41:14,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:14,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:14,908 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:41:14,908 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 21:41:15,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:15,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534578656] [2024-11-22 21:41:15,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534578656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:15,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535492670] [2024-11-22 21:41:15,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:15,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:15,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:15,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:15,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:41:15,096 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:41:15,096 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:15,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 21:41:15,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:15,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:41:15,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:41:15,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:41:15,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 21:41:15,176 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:41:15,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:41:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 21:41:15,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 21:41:15,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535492670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:15,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:15,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:41:15,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353485051] [2024-11-22 21:41:15,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:15,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:41:15,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:15,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:41:15,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:41:16,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-22 21:41:16,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 82 transitions, 757 flow. Second operand has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 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) [2024-11-22 21:41:16,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:16,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-22 21:41:16,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:16,505 INFO L124 PetriNetUnfolderBase]: 1475/2759 cut-off events. [2024-11-22 21:41:16,505 INFO L125 PetriNetUnfolderBase]: For 14501/14936 co-relation queries the response was YES. [2024-11-22 21:41:16,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9116 conditions, 2759 events. 1475/2759 cut-off events. For 14501/14936 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17961 event pairs, 465 based on Foata normal form. 31/2739 useless extension candidates. Maximal degree in co-relation 7339. Up to 1322 conditions per place. [2024-11-22 21:41:16,516 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 72 selfloop transitions, 23 changer transitions 0/108 dead transitions. [2024-11-22 21:41:16,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 108 transitions, 1232 flow [2024-11-22 21:41:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:41:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:41:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-11-22 21:41:16,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-11-22 21:41:16,518 INFO L175 Difference]: Start difference. First operand has 123 places, 82 transitions, 757 flow. Second operand 7 states and 167 transitions. [2024-11-22 21:41:16,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 108 transitions, 1232 flow [2024-11-22 21:41:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 108 transitions, 1172 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:16,528 INFO L231 Difference]: Finished difference. Result has 121 places, 81 transitions, 751 flow [2024-11-22 21:41:16,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=751, PETRI_PLACES=121, PETRI_TRANSITIONS=81} [2024-11-22 21:41:16,528 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-11-22 21:41:16,529 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 81 transitions, 751 flow [2024-11-22 21:41:16,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 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) [2024-11-22 21:41:16,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:16,529 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:16,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-22 21:41:16,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-22 21:41:16,734 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:16,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1906942946, now seen corresponding path program 1 times [2024-11-22 21:41:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:16,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181289052] [2024-11-22 21:41:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:16,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:16,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181289052] [2024-11-22 21:41:16,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181289052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:16,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:16,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:16,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830695806] [2024-11-22 21:41:16,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:16,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:16,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:16,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:17,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:17,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 81 transitions, 751 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:17,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:17,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:17,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:17,573 INFO L124 PetriNetUnfolderBase]: 1827/3439 cut-off events. [2024-11-22 21:41:17,573 INFO L125 PetriNetUnfolderBase]: For 12114/12114 co-relation queries the response was YES. [2024-11-22 21:41:17,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11744 conditions, 3439 events. 1827/3439 cut-off events. For 12114/12114 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21068 event pairs, 481 based on Foata normal form. 20/3447 useless extension candidates. Maximal degree in co-relation 9356. Up to 2654 conditions per place. [2024-11-22 21:41:17,584 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 86 selfloop transitions, 29 changer transitions 15/141 dead transitions. [2024-11-22 21:41:17,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 141 transitions, 1431 flow [2024-11-22 21:41:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-11-22 21:41:17,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879629629629629 [2024-11-22 21:41:17,585 INFO L175 Difference]: Start difference. First operand has 121 places, 81 transitions, 751 flow. Second operand 9 states and 254 transitions. [2024-11-22 21:41:17,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 141 transitions, 1431 flow [2024-11-22 21:41:17,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 141 transitions, 1353 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:17,596 INFO L231 Difference]: Finished difference. Result has 129 places, 97 transitions, 1050 flow [2024-11-22 21:41:17,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1050, PETRI_PLACES=129, PETRI_TRANSITIONS=97} [2024-11-22 21:41:17,597 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2024-11-22 21:41:17,597 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 97 transitions, 1050 flow [2024-11-22 21:41:17,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:17,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:17,597 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:17,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-22 21:41:17,597 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:17,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash 496777028, now seen corresponding path program 2 times [2024-11-22 21:41:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:17,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439511676] [2024-11-22 21:41:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:17,612 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:17,612 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:17,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439511676] [2024-11-22 21:41:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439511676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:17,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:17,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607110613] [2024-11-22 21:41:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:17,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:17,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:17,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 97 transitions, 1050 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:17,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:17,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:17,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:18,299 INFO L124 PetriNetUnfolderBase]: 1835/3448 cut-off events. [2024-11-22 21:41:18,299 INFO L125 PetriNetUnfolderBase]: For 13417/13417 co-relation queries the response was YES. [2024-11-22 21:41:18,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12615 conditions, 3448 events. 1835/3448 cut-off events. For 13417/13417 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 21098 event pairs, 661 based on Foata normal form. 20/3441 useless extension candidates. Maximal degree in co-relation 10139. Up to 2678 conditions per place. [2024-11-22 21:41:18,315 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 79 selfloop transitions, 54 changer transitions 9/153 dead transitions. [2024-11-22 21:41:18,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 153 transitions, 1939 flow [2024-11-22 21:41:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-22 21:41:18,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-22 21:41:18,317 INFO L175 Difference]: Start difference. First operand has 129 places, 97 transitions, 1050 flow. Second operand 9 states and 249 transitions. [2024-11-22 21:41:18,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 153 transitions, 1939 flow [2024-11-22 21:41:18,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1820 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-11-22 21:41:18,339 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1620 flow [2024-11-22 21:41:18,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1620, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2024-11-22 21:41:18,339 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 89 predicate places. [2024-11-22 21:41:18,339 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1620 flow [2024-11-22 21:41:18,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:18,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:18,340 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:18,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-22 21:41:18,340 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:18,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1787559940, now seen corresponding path program 1 times [2024-11-22 21:41:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:18,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101799661] [2024-11-22 21:41:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:18,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:18,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101799661] [2024-11-22 21:41:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101799661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:18,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:18,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:18,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052790388] [2024-11-22 21:41:18,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:18,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:18,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:18,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:18,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1620 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:18,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:18,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:18,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:19,085 INFO L124 PetriNetUnfolderBase]: 1951/3627 cut-off events. [2024-11-22 21:41:19,085 INFO L125 PetriNetUnfolderBase]: For 15056/15056 co-relation queries the response was YES. [2024-11-22 21:41:19,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14278 conditions, 3627 events. 1951/3627 cut-off events. For 15056/15056 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 21983 event pairs, 597 based on Foata normal form. 16/3630 useless extension candidates. Maximal degree in co-relation 12021. Up to 2726 conditions per place. [2024-11-22 21:41:19,102 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 88 selfloop transitions, 74 changer transitions 7/180 dead transitions. [2024-11-22 21:41:19,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 2608 flow [2024-11-22 21:41:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-22 21:41:19,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-22 21:41:19,103 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1620 flow. Second operand 9 states and 249 transitions. [2024-11-22 21:41:19,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 2608 flow [2024-11-22 21:41:19,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 180 transitions, 2587 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-22 21:41:19,137 INFO L231 Difference]: Finished difference. Result has 145 places, 152 transitions, 2334 flow [2024-11-22 21:41:19,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2334, PETRI_PLACES=145, PETRI_TRANSITIONS=152} [2024-11-22 21:41:19,137 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-11-22 21:41:19,137 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 152 transitions, 2334 flow [2024-11-22 21:41:19,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:19,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:19,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:19,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-22 21:41:19,138 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:19,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash 99944470, now seen corresponding path program 2 times [2024-11-22 21:41:19,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:19,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606679160] [2024-11-22 21:41:19,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:19,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:19,157 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:19,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:19,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:19,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606679160] [2024-11-22 21:41:19,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606679160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:19,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:19,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:19,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169424036] [2024-11-22 21:41:19,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:19,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:19,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:19,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:19,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 152 transitions, 2334 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:19,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:19,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:19,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:20,004 INFO L124 PetriNetUnfolderBase]: 1935/3624 cut-off events. [2024-11-22 21:41:20,004 INFO L125 PetriNetUnfolderBase]: For 17077/17077 co-relation queries the response was YES. [2024-11-22 21:41:20,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14923 conditions, 3624 events. 1935/3624 cut-off events. For 17077/17077 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 22143 event pairs, 630 based on Foata normal form. 16/3613 useless extension candidates. Maximal degree in co-relation 12537. Up to 2726 conditions per place. [2024-11-22 21:41:20,019 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 85 selfloop transitions, 79 changer transitions 15/190 dead transitions. [2024-11-22 21:41:20,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 190 transitions, 3007 flow [2024-11-22 21:41:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-22 21:41:20,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-22 21:41:20,020 INFO L175 Difference]: Start difference. First operand has 145 places, 152 transitions, 2334 flow. Second operand 9 states and 249 transitions. [2024-11-22 21:41:20,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 190 transitions, 3007 flow [2024-11-22 21:41:20,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 190 transitions, 2908 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-22 21:41:20,068 INFO L231 Difference]: Finished difference. Result has 152 places, 156 transitions, 2522 flow [2024-11-22 21:41:20,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2522, PETRI_PLACES=152, PETRI_TRANSITIONS=156} [2024-11-22 21:41:20,068 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 106 predicate places. [2024-11-22 21:41:20,068 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 156 transitions, 2522 flow [2024-11-22 21:41:20,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:20,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:20,069 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:20,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-22 21:41:20,069 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:20,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1823456774, now seen corresponding path program 3 times [2024-11-22 21:41:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389656553] [2024-11-22 21:41:20,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:41:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:20,082 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:41:20,082 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:20,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:20,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389656553] [2024-11-22 21:41:20,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389656553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:20,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7058717] [2024-11-22 21:41:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:41:20,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:20,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:20,293 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:20,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:41:20,349 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:41:20,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:20,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:41:20,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:20,480 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 15 treesize of output 7 [2024-11-22 21:41:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:20,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:20,637 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:20,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7058717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:20,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-22 21:41:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208749079] [2024-11-22 21:41:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:20,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:41:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:41:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:41:21,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:21,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 156 transitions, 2522 flow. Second operand has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 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) [2024-11-22 21:41:21,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:21,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:21,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:21,621 INFO L124 PetriNetUnfolderBase]: 2027/3803 cut-off events. [2024-11-22 21:41:21,622 INFO L125 PetriNetUnfolderBase]: For 20480/20480 co-relation queries the response was YES. [2024-11-22 21:41:21,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15993 conditions, 3803 events. 2027/3803 cut-off events. For 20480/20480 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 23367 event pairs, 160 based on Foata normal form. 53/3843 useless extension candidates. Maximal degree in co-relation 14098. Up to 2029 conditions per place. [2024-11-22 21:41:21,643 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 116 selfloop transitions, 90 changer transitions 4/221 dead transitions. [2024-11-22 21:41:21,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 3396 flow [2024-11-22 21:41:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:41:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:41:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 293 transitions. [2024-11-22 21:41:21,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6104166666666667 [2024-11-22 21:41:21,645 INFO L175 Difference]: Start difference. First operand has 152 places, 156 transitions, 2522 flow. Second operand 10 states and 293 transitions. [2024-11-22 21:41:21,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 3396 flow [2024-11-22 21:41:21,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 221 transitions, 3212 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:21,705 INFO L231 Difference]: Finished difference. Result has 154 places, 162 transitions, 2644 flow [2024-11-22 21:41:21,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2644, PETRI_PLACES=154, PETRI_TRANSITIONS=162} [2024-11-22 21:41:21,705 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 108 predicate places. [2024-11-22 21:41:21,705 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 162 transitions, 2644 flow [2024-11-22 21:41:21,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 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) [2024-11-22 21:41:21,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:21,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:21,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:21,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:21,906 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:21,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash 518560062, now seen corresponding path program 3 times [2024-11-22 21:41:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111571674] [2024-11-22 21:41:21,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:41:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:21,923 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:41:21,923 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:22,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111571674] [2024-11-22 21:41:22,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111571674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:22,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:22,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:22,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718835211] [2024-11-22 21:41:22,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:22,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:22,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:22,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 162 transitions, 2644 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:22,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:22,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:22,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:22,742 INFO L124 PetriNetUnfolderBase]: 2107/3932 cut-off events. [2024-11-22 21:41:22,743 INFO L125 PetriNetUnfolderBase]: For 23402/23402 co-relation queries the response was YES. [2024-11-22 21:41:22,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17069 conditions, 3932 events. 2107/3932 cut-off events. For 23402/23402 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 24249 event pairs, 748 based on Foata normal form. 20/3923 useless extension candidates. Maximal degree in co-relation 15524. Up to 2992 conditions per place. [2024-11-22 21:41:22,765 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 90 selfloop transitions, 87 changer transitions 12/200 dead transitions. [2024-11-22 21:41:22,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 200 transitions, 3345 flow [2024-11-22 21:41:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-11-22 21:41:22,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-11-22 21:41:22,766 INFO L175 Difference]: Start difference. First operand has 154 places, 162 transitions, 2644 flow. Second operand 9 states and 250 transitions. [2024-11-22 21:41:22,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 200 transitions, 3345 flow [2024-11-22 21:41:22,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 200 transitions, 3151 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:22,828 INFO L231 Difference]: Finished difference. Result has 158 places, 170 transitions, 2840 flow [2024-11-22 21:41:22,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2840, PETRI_PLACES=158, PETRI_TRANSITIONS=170} [2024-11-22 21:41:22,829 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 112 predicate places. [2024-11-22 21:41:22,829 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 170 transitions, 2840 flow [2024-11-22 21:41:22,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:22,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:22,829 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:22,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-22 21:41:22,829 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:22,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1572317850, now seen corresponding path program 4 times [2024-11-22 21:41:22,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385279882] [2024-11-22 21:41:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:41:22,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:22,840 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:41:22,840 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:22,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385279882] [2024-11-22 21:41:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385279882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:22,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:41:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457269035] [2024-11-22 21:41:22,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:22,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:41:22,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:22,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:41:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:41:23,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:23,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 170 transitions, 2840 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-22 21:41:23,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:23,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:23,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:23,408 INFO L124 PetriNetUnfolderBase]: 2047/3816 cut-off events. [2024-11-22 21:41:23,408 INFO L125 PetriNetUnfolderBase]: For 22662/22662 co-relation queries the response was YES. [2024-11-22 21:41:23,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17032 conditions, 3816 events. 2047/3816 cut-off events. For 22662/22662 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 23753 event pairs, 709 based on Foata normal form. 20/3815 useless extension candidates. Maximal degree in co-relation 16123. Up to 3036 conditions per place. [2024-11-22 21:41:23,429 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 103 selfloop transitions, 100 changer transitions 7/221 dead transitions. [2024-11-22 21:41:23,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 221 transitions, 3933 flow [2024-11-22 21:41:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:41:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:41:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-11-22 21:41:23,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5963541666666666 [2024-11-22 21:41:23,430 INFO L175 Difference]: Start difference. First operand has 158 places, 170 transitions, 2840 flow. Second operand 8 states and 229 transitions. [2024-11-22 21:41:23,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 221 transitions, 3933 flow [2024-11-22 21:41:23,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 221 transitions, 3734 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:23,501 INFO L231 Difference]: Finished difference. Result has 161 places, 189 transitions, 3412 flow [2024-11-22 21:41:23,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3412, PETRI_PLACES=161, PETRI_TRANSITIONS=189} [2024-11-22 21:41:23,502 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 115 predicate places. [2024-11-22 21:41:23,502 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 189 transitions, 3412 flow [2024-11-22 21:41:23,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-22 21:41:23,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:23,502 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:23,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-22 21:41:23,502 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:23,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash 200459714, now seen corresponding path program 5 times [2024-11-22 21:41:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:23,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696895342] [2024-11-22 21:41:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:23,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:23,522 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:23,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:24,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:24,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696895342] [2024-11-22 21:41:24,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696895342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:24,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930219068] [2024-11-22 21:41:24,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:24,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:24,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:24,193 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:24,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:41:24,259 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:24,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:24,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:41:24,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:24,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:41:24,503 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:41:24,503 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 27 treesize of output 15 [2024-11-22 21:41:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:24,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:24,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:24,702 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 158 treesize of output 154 [2024-11-22 21:41:24,717 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:41:24,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-22 21:41:24,777 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-22 21:41:24,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 169 [2024-11-22 21:41:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:25,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930219068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:25,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:25,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2024-11-22 21:41:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470529109] [2024-11-22 21:41:25,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:25,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 21:41:25,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 21:41:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2024-11-22 21:41:25,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:41:25,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 189 transitions, 3412 flow. Second operand has 29 states, 29 states have (on average 17.93103448275862) internal successors, (520), 29 states have internal predecessors, (520), 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) [2024-11-22 21:41:25,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:25,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:41:25,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:26,511 INFO L124 PetriNetUnfolderBase]: 2019/3774 cut-off events. [2024-11-22 21:41:26,512 INFO L125 PetriNetUnfolderBase]: For 24183/24183 co-relation queries the response was YES. [2024-11-22 21:41:26,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 3774 events. 2019/3774 cut-off events. For 24183/24183 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 23283 event pairs, 710 based on Foata normal form. 20/3775 useless extension candidates. Maximal degree in co-relation 15980. Up to 3036 conditions per place. [2024-11-22 21:41:26,532 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 88 selfloop transitions, 109 changer transitions 7/215 dead transitions. [2024-11-22 21:41:26,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 215 transitions, 3985 flow [2024-11-22 21:41:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:41:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:41:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-11-22 21:41:26,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-11-22 21:41:26,533 INFO L175 Difference]: Start difference. First operand has 161 places, 189 transitions, 3412 flow. Second operand 11 states and 254 transitions. [2024-11-22 21:41:26,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 215 transitions, 3985 flow [2024-11-22 21:41:26,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 3716 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-22 21:41:26,609 INFO L231 Difference]: Finished difference. Result has 167 places, 190 transitions, 3428 flow [2024-11-22 21:41:26,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3428, PETRI_PLACES=167, PETRI_TRANSITIONS=190} [2024-11-22 21:41:26,610 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 121 predicate places. [2024-11-22 21:41:26,610 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 190 transitions, 3428 flow [2024-11-22 21:41:26,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 17.93103448275862) internal successors, (520), 29 states have internal predecessors, (520), 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) [2024-11-22 21:41:26,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:26,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:26,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:26,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:26,811 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:26,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1303446156, now seen corresponding path program 4 times [2024-11-22 21:41:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039647872] [2024-11-22 21:41:26,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:41:26,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:26,820 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:41:26,820 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:26,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039647872] [2024-11-22 21:41:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039647872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956869886] [2024-11-22 21:41:26,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:41:26,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:26,929 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:26,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 21:41:26,985 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:41:26,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:26,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:41:26,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:27,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:27,130 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 29 treesize of output 21 [2024-11-22 21:41:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:27,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:27,238 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:27,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:27,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956869886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:27,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:27,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-11-22 21:41:27,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033935182] [2024-11-22 21:41:27,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:27,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:41:27,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:41:27,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:41:27,537 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:27,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 190 transitions, 3428 flow. Second operand has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-22 21:41:27,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:27,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:27,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:28,258 INFO L124 PetriNetUnfolderBase]: 2292/4336 cut-off events. [2024-11-22 21:41:28,258 INFO L125 PetriNetUnfolderBase]: For 26198/26198 co-relation queries the response was YES. [2024-11-22 21:41:28,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18983 conditions, 4336 events. 2292/4336 cut-off events. For 26198/26198 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 27905 event pairs, 414 based on Foata normal form. 53/4375 useless extension candidates. Maximal degree in co-relation 18045. Up to 2609 conditions per place. [2024-11-22 21:41:28,280 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 132 selfloop transitions, 138 changer transitions 0/281 dead transitions. [2024-11-22 21:41:28,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 281 transitions, 4608 flow [2024-11-22 21:41:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:41:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:41:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 420 transitions. [2024-11-22 21:41:28,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-22 21:41:28,281 INFO L175 Difference]: Start difference. First operand has 167 places, 190 transitions, 3428 flow. Second operand 15 states and 420 transitions. [2024-11-22 21:41:28,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 281 transitions, 4608 flow [2024-11-22 21:41:28,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 281 transitions, 4336 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-11-22 21:41:28,353 INFO L231 Difference]: Finished difference. Result has 175 places, 216 transitions, 3910 flow [2024-11-22 21:41:28,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3910, PETRI_PLACES=175, PETRI_TRANSITIONS=216} [2024-11-22 21:41:28,353 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 129 predicate places. [2024-11-22 21:41:28,354 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 216 transitions, 3910 flow [2024-11-22 21:41:28,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-22 21:41:28,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:28,354 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:28,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-22 21:41:28,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:28,554 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:28,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1730498628, now seen corresponding path program 6 times [2024-11-22 21:41:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:28,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796409635] [2024-11-22 21:41:28,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:41:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:28,567 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:41:28,567 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:28,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:28,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796409635] [2024-11-22 21:41:28,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796409635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:28,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:28,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372126721] [2024-11-22 21:41:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:28,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:28,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:28,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 216 transitions, 3910 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:28,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:28,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:28,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:29,452 INFO L124 PetriNetUnfolderBase]: 2272/4319 cut-off events. [2024-11-22 21:41:29,452 INFO L125 PetriNetUnfolderBase]: For 28973/28973 co-relation queries the response was YES. [2024-11-22 21:41:29,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19690 conditions, 4319 events. 2272/4319 cut-off events. For 28973/28973 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 27892 event pairs, 728 based on Foata normal form. 20/4320 useless extension candidates. Maximal degree in co-relation 18773. Up to 3618 conditions per place. [2024-11-22 21:41:29,475 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 106 changer transitions 4/236 dead transitions. [2024-11-22 21:41:29,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 236 transitions, 4380 flow [2024-11-22 21:41:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-11-22 21:41:29,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-11-22 21:41:29,477 INFO L175 Difference]: Start difference. First operand has 175 places, 216 transitions, 3910 flow. Second operand 9 states and 246 transitions. [2024-11-22 21:41:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 236 transitions, 4380 flow [2024-11-22 21:41:29,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 236 transitions, 4245 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:29,577 INFO L231 Difference]: Finished difference. Result has 177 places, 211 transitions, 3881 flow [2024-11-22 21:41:29,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3881, PETRI_PLACES=177, PETRI_TRANSITIONS=211} [2024-11-22 21:41:29,577 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 131 predicate places. [2024-11-22 21:41:29,577 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 211 transitions, 3881 flow [2024-11-22 21:41:29,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:29,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:29,578 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:29,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-22 21:41:29,578 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:29,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1786201904, now seen corresponding path program 5 times [2024-11-22 21:41:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:29,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835628452] [2024-11-22 21:41:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:29,587 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:29,587 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:29,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835628452] [2024-11-22 21:41:29,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835628452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906119200] [2024-11-22 21:41:29,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:29,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:29,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:29,867 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:29,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-22 21:41:29,923 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:29,923 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:29,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:41:29,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:30,047 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 21:41:30,047 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 10 [2024-11-22 21:41:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:30,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:30,140 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:30,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906119200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:30,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:30,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-22 21:41:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867901549] [2024-11-22 21:41:30,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:30,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:41:30,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:41:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:41:30,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:30,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 211 transitions, 3881 flow. Second operand has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 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) [2024-11-22 21:41:30,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:30,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:30,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:31,475 INFO L124 PetriNetUnfolderBase]: 2268/4288 cut-off events. [2024-11-22 21:41:31,475 INFO L125 PetriNetUnfolderBase]: For 28815/28815 co-relation queries the response was YES. [2024-11-22 21:41:31,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20050 conditions, 4288 events. 2268/4288 cut-off events. For 28815/28815 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 27551 event pairs, 424 based on Foata normal form. 53/4328 useless extension candidates. Maximal degree in co-relation 19096. Up to 2713 conditions per place. [2024-11-22 21:41:31,498 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 135 selfloop transitions, 134 changer transitions 0/280 dead transitions. [2024-11-22 21:41:31,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 280 transitions, 4792 flow [2024-11-22 21:41:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:41:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:41:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 396 transitions. [2024-11-22 21:41:31,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-11-22 21:41:31,499 INFO L175 Difference]: Start difference. First operand has 177 places, 211 transitions, 3881 flow. Second operand 14 states and 396 transitions. [2024-11-22 21:41:31,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 280 transitions, 4792 flow [2024-11-22 21:41:31,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 280 transitions, 4587 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:31,601 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 4016 flow [2024-11-22 21:41:31,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4016, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-11-22 21:41:31,602 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 139 predicate places. [2024-11-22 21:41:31,602 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 4016 flow [2024-11-22 21:41:31,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 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) [2024-11-22 21:41:31,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:31,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:31,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-22 21:41:31,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-22 21:41:31,803 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:31,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1579898740, now seen corresponding path program 6 times [2024-11-22 21:41:31,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:31,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803690119] [2024-11-22 21:41:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:41:31,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:31,815 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:41:31,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:31,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803690119] [2024-11-22 21:41:31,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803690119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:31,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:31,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:31,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166626944] [2024-11-22 21:41:31,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:31,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:31,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:32,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:32,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 4016 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:32,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:32,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:32,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:32,569 INFO L124 PetriNetUnfolderBase]: 2165/4045 cut-off events. [2024-11-22 21:41:32,569 INFO L125 PetriNetUnfolderBase]: For 31954/31954 co-relation queries the response was YES. [2024-11-22 21:41:32,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19917 conditions, 4045 events. 2165/4045 cut-off events. For 31954/31954 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 25288 event pairs, 638 based on Foata normal form. 16/4044 useless extension candidates. Maximal degree in co-relation 18960. Up to 3385 conditions per place. [2024-11-22 21:41:32,596 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 119 selfloop transitions, 101 changer transitions 3/234 dead transitions. [2024-11-22 21:41:32,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 234 transitions, 4452 flow [2024-11-22 21:41:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-22 21:41:32,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-22 21:41:32,597 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 4016 flow. Second operand 9 states and 244 transitions. [2024-11-22 21:41:32,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 234 transitions, 4452 flow [2024-11-22 21:41:32,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 234 transitions, 4240 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:32,706 INFO L231 Difference]: Finished difference. Result has 186 places, 210 transitions, 3867 flow [2024-11-22 21:41:32,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3867, PETRI_PLACES=186, PETRI_TRANSITIONS=210} [2024-11-22 21:41:32,707 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 140 predicate places. [2024-11-22 21:41:32,707 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 210 transitions, 3867 flow [2024-11-22 21:41:32,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:32,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:32,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:32,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-22 21:41:32,707 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:32,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:32,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1501871816, now seen corresponding path program 7 times [2024-11-22 21:41:32,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:32,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843540894] [2024-11-22 21:41:32,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:41:32,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:32,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843540894] [2024-11-22 21:41:32,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843540894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510991936] [2024-11-22 21:41:32,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:41:32,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:32,896 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:32,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-22 21:41:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:32,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:41:32,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:33,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:33,036 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 29 treesize of output 25 [2024-11-22 21:41:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:33,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:33,135 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:33,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:33,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510991936] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:33,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:41:33,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2024-11-22 21:41:33,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792803910] [2024-11-22 21:41:33,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:33,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:41:33,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:33,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:41:33,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:41:33,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:33,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 210 transitions, 3867 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-22 21:41:33,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:33,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:33,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:33,842 INFO L124 PetriNetUnfolderBase]: 2220/4105 cut-off events. [2024-11-22 21:41:33,843 INFO L125 PetriNetUnfolderBase]: For 31242/31242 co-relation queries the response was YES. [2024-11-22 21:41:33,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20089 conditions, 4105 events. 2220/4105 cut-off events. For 31242/31242 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 25550 event pairs, 610 based on Foata normal form. 46/4130 useless extension candidates. Maximal degree in co-relation 19132. Up to 3423 conditions per place. [2024-11-22 21:41:33,866 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 133 selfloop transitions, 101 changer transitions 0/245 dead transitions. [2024-11-22 21:41:33,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 245 transitions, 4591 flow [2024-11-22 21:41:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-11-22 21:41:33,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5810185185185185 [2024-11-22 21:41:33,867 INFO L175 Difference]: Start difference. First operand has 186 places, 210 transitions, 3867 flow. Second operand 9 states and 251 transitions. [2024-11-22 21:41:33,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 245 transitions, 4591 flow [2024-11-22 21:41:34,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 4389 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:34,010 INFO L231 Difference]: Finished difference. Result has 186 places, 214 transitions, 3960 flow [2024-11-22 21:41:34,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3665, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3960, PETRI_PLACES=186, PETRI_TRANSITIONS=214} [2024-11-22 21:41:34,010 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 140 predicate places. [2024-11-22 21:41:34,010 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 214 transitions, 3960 flow [2024-11-22 21:41:34,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-22 21:41:34,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:34,011 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:34,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:34,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-22 21:41:34,211 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:34,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1086893824, now seen corresponding path program 7 times [2024-11-22 21:41:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:34,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564828084] [2024-11-22 21:41:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:41:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:34,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564828084] [2024-11-22 21:41:34,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564828084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:34,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376728744] [2024-11-22 21:41:34,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:41:34,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:34,397 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:34,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-22 21:41:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:34,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:41:34,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:34,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:34,545 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 29 treesize of output 25 [2024-11-22 21:41:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:34,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:34,658 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:34,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376728744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:34,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:34,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-22 21:41:34,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545116099] [2024-11-22 21:41:34,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:34,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:41:34,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:34,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:41:34,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:41:34,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:34,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 214 transitions, 3960 flow. Second operand has 21 states, 21 states have (on average 22.80952380952381) internal successors, (479), 21 states have internal predecessors, (479), 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) [2024-11-22 21:41:34,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:34,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:34,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:35,686 INFO L124 PetriNetUnfolderBase]: 2421/4531 cut-off events. [2024-11-22 21:41:35,686 INFO L125 PetriNetUnfolderBase]: For 38383/38383 co-relation queries the response was YES. [2024-11-22 21:41:35,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22392 conditions, 4531 events. 2421/4531 cut-off events. For 38383/38383 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29266 event pairs, 680 based on Foata normal form. 53/4565 useless extension candidates. Maximal degree in co-relation 21434. Up to 3555 conditions per place. [2024-11-22 21:41:35,714 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 142 selfloop transitions, 119 changer transitions 0/272 dead transitions. [2024-11-22 21:41:35,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 272 transitions, 5152 flow [2024-11-22 21:41:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 21:41:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 21:41:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 327 transitions. [2024-11-22 21:41:35,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-11-22 21:41:35,715 INFO L175 Difference]: Start difference. First operand has 186 places, 214 transitions, 3960 flow. Second operand 12 states and 327 transitions. [2024-11-22 21:41:35,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 272 transitions, 5152 flow [2024-11-22 21:41:35,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 272 transitions, 4990 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:35,851 INFO L231 Difference]: Finished difference. Result has 194 places, 236 transitions, 4617 flow [2024-11-22 21:41:35,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4617, PETRI_PLACES=194, PETRI_TRANSITIONS=236} [2024-11-22 21:41:35,851 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 148 predicate places. [2024-11-22 21:41:35,851 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 236 transitions, 4617 flow [2024-11-22 21:41:35,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.80952380952381) internal successors, (479), 21 states have internal predecessors, (479), 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) [2024-11-22 21:41:35,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:35,852 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:35,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-22 21:41:36,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-22 21:41:36,052 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:36,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 938491240, now seen corresponding path program 8 times [2024-11-22 21:41:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:36,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712090617] [2024-11-22 21:41:36,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:36,066 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:36,066 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:36,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:36,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712090617] [2024-11-22 21:41:36,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712090617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518694679] [2024-11-22 21:41:36,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:36,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:36,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:36,259 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:36,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-22 21:41:36,321 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:36,322 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:36,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:41:36,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:36,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:41:36,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:36,431 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 29 treesize of output 21 [2024-11-22 21:41:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:36,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:36,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:36,566 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 158 treesize of output 154 [2024-11-22 21:41:36,598 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:41:36,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-22 21:41:36,632 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-22 21:41:36,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 178 [2024-11-22 21:41:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518694679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:36,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:36,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2024-11-22 21:41:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313443571] [2024-11-22 21:41:36,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:36,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:41:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:41:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:41:37,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:37,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 236 transitions, 4617 flow. Second operand has 21 states, 21 states have (on average 22.333333333333332) internal successors, (469), 21 states have internal predecessors, (469), 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) [2024-11-22 21:41:37,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:37,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:37,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:38,169 INFO L124 PetriNetUnfolderBase]: 2714/5140 cut-off events. [2024-11-22 21:41:38,169 INFO L125 PetriNetUnfolderBase]: For 47577/47577 co-relation queries the response was YES. [2024-11-22 21:41:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25556 conditions, 5140 events. 2714/5140 cut-off events. For 47577/47577 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 34714 event pairs, 718 based on Foata normal form. 53/5172 useless extension candidates. Maximal degree in co-relation 24251. Up to 3873 conditions per place. [2024-11-22 21:41:38,210 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 159 selfloop transitions, 140 changer transitions 0/310 dead transitions. [2024-11-22 21:41:38,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 310 transitions, 5729 flow [2024-11-22 21:41:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 21:41:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 21:41:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 459 transitions. [2024-11-22 21:41:38,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-22 21:41:38,211 INFO L175 Difference]: Start difference. First operand has 194 places, 236 transitions, 4617 flow. Second operand 17 states and 459 transitions. [2024-11-22 21:41:38,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 310 transitions, 5729 flow [2024-11-22 21:41:38,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 310 transitions, 5504 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:38,368 INFO L231 Difference]: Finished difference. Result has 208 places, 255 transitions, 5069 flow [2024-11-22 21:41:38,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5069, PETRI_PLACES=208, PETRI_TRANSITIONS=255} [2024-11-22 21:41:38,368 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 162 predicate places. [2024-11-22 21:41:38,369 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 255 transitions, 5069 flow [2024-11-22 21:41:38,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.333333333333332) internal successors, (469), 21 states have internal predecessors, (469), 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) [2024-11-22 21:41:38,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:38,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:38,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:38,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:38,570 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:38,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -959884826, now seen corresponding path program 9 times [2024-11-22 21:41:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:38,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540062103] [2024-11-22 21:41:38,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:41:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:38,582 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:41:38,582 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:38,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540062103] [2024-11-22 21:41:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540062103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:38,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:38,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772557251] [2024-11-22 21:41:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:38,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:38,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:38,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:38,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:38,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 255 transitions, 5069 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:38,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:38,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:38,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:39,606 INFO L124 PetriNetUnfolderBase]: 2611/4902 cut-off events. [2024-11-22 21:41:39,606 INFO L125 PetriNetUnfolderBase]: For 51716/51716 co-relation queries the response was YES. [2024-11-22 21:41:39,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25612 conditions, 4902 events. 2611/4902 cut-off events. For 51716/51716 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 32488 event pairs, 784 based on Foata normal form. 16/4898 useless extension candidates. Maximal degree in co-relation 24246. Up to 4219 conditions per place. [2024-11-22 21:41:39,641 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 143 selfloop transitions, 110 changer transitions 3/267 dead transitions. [2024-11-22 21:41:39,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 267 transitions, 5510 flow [2024-11-22 21:41:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-22 21:41:39,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-22 21:41:39,642 INFO L175 Difference]: Start difference. First operand has 208 places, 255 transitions, 5069 flow. Second operand 9 states and 244 transitions. [2024-11-22 21:41:39,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 267 transitions, 5510 flow [2024-11-22 21:41:39,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 267 transitions, 5309 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-22 21:41:39,855 INFO L231 Difference]: Finished difference. Result has 208 places, 250 transitions, 4950 flow [2024-11-22 21:41:39,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4950, PETRI_PLACES=208, PETRI_TRANSITIONS=250} [2024-11-22 21:41:39,855 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 162 predicate places. [2024-11-22 21:41:39,856 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 250 transitions, 4950 flow [2024-11-22 21:41:39,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:39,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:39,856 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:39,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-11-22 21:41:39,856 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:39,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash 84792048, now seen corresponding path program 10 times [2024-11-22 21:41:39,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:39,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560505593] [2024-11-22 21:41:39,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:41:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:39,865 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:41:39,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:39,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560505593] [2024-11-22 21:41:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560505593] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:39,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:39,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:41:39,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016524333] [2024-11-22 21:41:39,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:39,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:41:39,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:39,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:41:39,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:41:40,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:40,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 250 transitions, 4950 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-22 21:41:40,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:40,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:40,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:40,648 INFO L124 PetriNetUnfolderBase]: 2500/4634 cut-off events. [2024-11-22 21:41:40,648 INFO L125 PetriNetUnfolderBase]: For 47168/47168 co-relation queries the response was YES. [2024-11-22 21:41:40,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24409 conditions, 4634 events. 2500/4634 cut-off events. For 47168/47168 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 29766 event pairs, 718 based on Foata normal form. 16/4633 useless extension candidates. Maximal degree in co-relation 23337. Up to 3996 conditions per place. [2024-11-22 21:41:40,673 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 148 selfloop transitions, 99 changer transitions 3/261 dead transitions. [2024-11-22 21:41:40,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 261 transitions, 5373 flow [2024-11-22 21:41:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:41:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:41:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-11-22 21:41:40,675 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-22 21:41:40,675 INFO L175 Difference]: Start difference. First operand has 208 places, 250 transitions, 4950 flow. Second operand 8 states and 224 transitions. [2024-11-22 21:41:40,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 261 transitions, 5373 flow [2024-11-22 21:41:40,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 261 transitions, 5172 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:40,831 INFO L231 Difference]: Finished difference. Result has 206 places, 244 transitions, 4803 flow [2024-11-22 21:41:40,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4616, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4803, PETRI_PLACES=206, PETRI_TRANSITIONS=244} [2024-11-22 21:41:40,831 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 160 predicate places. [2024-11-22 21:41:40,831 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 244 transitions, 4803 flow [2024-11-22 21:41:40,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-22 21:41:40,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:40,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:40,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-11-22 21:41:40,832 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:40,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1436443682, now seen corresponding path program 11 times [2024-11-22 21:41:40,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:40,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969596118] [2024-11-22 21:41:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:40,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:40,841 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:40,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:41,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969596118] [2024-11-22 21:41:41,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969596118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668978397] [2024-11-22 21:41:41,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:41,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:41,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:41,110 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:41,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-22 21:41:41,172 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:41,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:41,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:41:41,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:41,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:41:41,373 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 21:41:41,373 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 10 [2024-11-22 21:41:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:41,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:41,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:41,561 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 158 treesize of output 154 [2024-11-22 21:41:41,594 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:41:41,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-22 21:41:41,625 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-22 21:41:41,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 178 [2024-11-22 21:41:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668978397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:41,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:41,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2024-11-22 21:41:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748657411] [2024-11-22 21:41:41,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:41,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 21:41:41,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 21:41:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2024-11-22 21:41:42,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:42,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 244 transitions, 4803 flow. Second operand has 24 states, 24 states have (on average 22.375) internal successors, (537), 24 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:42,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:42,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:42,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:43,312 INFO L124 PetriNetUnfolderBase]: 2496/4608 cut-off events. [2024-11-22 21:41:43,312 INFO L125 PetriNetUnfolderBase]: For 50051/50051 co-relation queries the response was YES. [2024-11-22 21:41:43,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24756 conditions, 4608 events. 2496/4608 cut-off events. For 50051/50051 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 29379 event pairs, 675 based on Foata normal form. 53/4642 useless extension candidates. Maximal degree in co-relation 23459. Up to 3629 conditions per place. [2024-11-22 21:41:43,337 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 146 selfloop transitions, 128 changer transitions 0/285 dead transitions. [2024-11-22 21:41:43,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 285 transitions, 5581 flow [2024-11-22 21:41:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:41:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:41:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 354 transitions. [2024-11-22 21:41:43,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-11-22 21:41:43,338 INFO L175 Difference]: Start difference. First operand has 206 places, 244 transitions, 4803 flow. Second operand 13 states and 354 transitions. [2024-11-22 21:41:43,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 285 transitions, 5581 flow [2024-11-22 21:41:43,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 285 transitions, 5383 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:43,487 INFO L231 Difference]: Finished difference. Result has 211 places, 244 transitions, 4900 flow [2024-11-22 21:41:43,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4900, PETRI_PLACES=211, PETRI_TRANSITIONS=244} [2024-11-22 21:41:43,488 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 165 predicate places. [2024-11-22 21:41:43,488 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 244 transitions, 4900 flow [2024-11-22 21:41:43,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 22.375) internal successors, (537), 24 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:43,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:43,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:43,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:43,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:43,689 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:43,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash 676096896, now seen corresponding path program 8 times [2024-11-22 21:41:43,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48864507] [2024-11-22 21:41:43,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:43,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:43,699 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:43,699 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:43,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:43,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48864507] [2024-11-22 21:41:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48864507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:43,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770128772] [2024-11-22 21:41:43,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:43,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:43,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:43,874 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:43,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-22 21:41:43,939 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:43,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:43,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:41:43,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:44,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:44,033 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 29 treesize of output 21 [2024-11-22 21:41:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:44,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:44,128 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:44,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:44,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770128772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:44,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:44,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-22 21:41:44,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288307795] [2024-11-22 21:41:44,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:44,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:41:44,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:41:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:41:44,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:44,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 244 transitions, 4900 flow. Second operand has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 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) [2024-11-22 21:41:44,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:44,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:44,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:45,253 INFO L124 PetriNetUnfolderBase]: 2862/5329 cut-off events. [2024-11-22 21:41:45,253 INFO L125 PetriNetUnfolderBase]: For 58433/58433 co-relation queries the response was YES. [2024-11-22 21:41:45,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28440 conditions, 5329 events. 2862/5329 cut-off events. For 58433/58433 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 35438 event pairs, 670 based on Foata normal form. 46/5355 useless extension candidates. Maximal degree in co-relation 27052. Up to 4055 conditions per place. [2024-11-22 21:41:45,292 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 175 selfloop transitions, 134 changer transitions 0/320 dead transitions. [2024-11-22 21:41:45,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 320 transitions, 6149 flow [2024-11-22 21:41:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:41:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:41:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 387 transitions. [2024-11-22 21:41:45,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5758928571428571 [2024-11-22 21:41:45,293 INFO L175 Difference]: Start difference. First operand has 211 places, 244 transitions, 4900 flow. Second operand 14 states and 387 transitions. [2024-11-22 21:41:45,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 320 transitions, 6149 flow [2024-11-22 21:41:45,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 320 transitions, 5903 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-22 21:41:45,515 INFO L231 Difference]: Finished difference. Result has 217 places, 271 transitions, 5399 flow [2024-11-22 21:41:45,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5399, PETRI_PLACES=217, PETRI_TRANSITIONS=271} [2024-11-22 21:41:45,515 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 171 predicate places. [2024-11-22 21:41:45,515 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 271 transitions, 5399 flow [2024-11-22 21:41:45,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 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) [2024-11-22 21:41:45,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:45,516 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:45,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:45,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-22 21:41:45,716 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:45,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:45,717 INFO L85 PathProgramCache]: Analyzing trace with hash 203085490, now seen corresponding path program 9 times [2024-11-22 21:41:45,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:45,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178596863] [2024-11-22 21:41:45,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:41:45,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:45,730 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:41:45,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:45,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178596863] [2024-11-22 21:41:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178596863] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:45,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:45,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:45,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298198300] [2024-11-22 21:41:45,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:45,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:45,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:46,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:46,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 271 transitions, 5399 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:46,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:46,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:46,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:46,919 INFO L124 PetriNetUnfolderBase]: 2842/5308 cut-off events. [2024-11-22 21:41:46,920 INFO L125 PetriNetUnfolderBase]: For 58144/58144 co-relation queries the response was YES. [2024-11-22 21:41:46,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28423 conditions, 5308 events. 2842/5308 cut-off events. For 58144/58144 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 35451 event pairs, 809 based on Foata normal form. 20/5309 useless extension candidates. Maximal degree in co-relation 27301. Up to 4647 conditions per place. [2024-11-22 21:41:46,957 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 167 selfloop transitions, 102 changer transitions 4/284 dead transitions. [2024-11-22 21:41:46,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 284 transitions, 5898 flow [2024-11-22 21:41:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-22 21:41:46,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-22 21:41:46,958 INFO L175 Difference]: Start difference. First operand has 217 places, 271 transitions, 5399 flow. Second operand 9 states and 244 transitions. [2024-11-22 21:41:46,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 284 transitions, 5898 flow [2024-11-22 21:41:47,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 284 transitions, 5546 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-11-22 21:41:47,199 INFO L231 Difference]: Finished difference. Result has 216 places, 266 transitions, 5137 flow [2024-11-22 21:41:47,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5137, PETRI_PLACES=216, PETRI_TRANSITIONS=266} [2024-11-22 21:41:47,200 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 170 predicate places. [2024-11-22 21:41:47,200 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 266 transitions, 5137 flow [2024-11-22 21:41:47,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:47,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:47,200 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:47,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-11-22 21:41:47,200 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:47,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash -239960984, now seen corresponding path program 10 times [2024-11-22 21:41:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:47,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729354823] [2024-11-22 21:41:47,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:41:47,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:47,208 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:41:47,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:47,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:47,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729354823] [2024-11-22 21:41:47,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729354823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:47,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143614250] [2024-11-22 21:41:47,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:41:47,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:47,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:47,301 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:47,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-22 21:41:47,371 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:41:47,372 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:47,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:41:47,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:47,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:47,520 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 29 treesize of output 21 [2024-11-22 21:41:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:47,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:47,609 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:47,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:47,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143614250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:47,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:47,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-11-22 21:41:47,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321822609] [2024-11-22 21:41:47,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:47,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:41:47,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:41:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:41:47,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:47,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 266 transitions, 5137 flow. Second operand has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-22 21:41:47,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:47,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:47,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:48,748 INFO L124 PetriNetUnfolderBase]: 2843/5315 cut-off events. [2024-11-22 21:41:48,748 INFO L125 PetriNetUnfolderBase]: For 55677/55677 co-relation queries the response was YES. [2024-11-22 21:41:48,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27950 conditions, 5315 events. 2843/5315 cut-off events. For 55677/55677 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 35539 event pairs, 794 based on Foata normal form. 46/5340 useless extension candidates. Maximal degree in co-relation 26837. Up to 4607 conditions per place. [2024-11-22 21:41:48,789 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 177 selfloop transitions, 108 changer transitions 0/296 dead transitions. [2024-11-22 21:41:48,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 296 transitions, 5874 flow [2024-11-22 21:41:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:41:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:41:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2024-11-22 21:41:48,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-11-22 21:41:48,790 INFO L175 Difference]: Start difference. First operand has 216 places, 266 transitions, 5137 flow. Second operand 11 states and 298 transitions. [2024-11-22 21:41:48,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 296 transitions, 5874 flow [2024-11-22 21:41:49,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 296 transitions, 5670 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:49,022 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 5184 flow [2024-11-22 21:41:49,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5184, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-11-22 21:41:49,022 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 174 predicate places. [2024-11-22 21:41:49,022 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 5184 flow [2024-11-22 21:41:49,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-22 21:41:49,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:49,023 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:49,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:49,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-22 21:41:49,223 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:49,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1491959532, now seen corresponding path program 11 times [2024-11-22 21:41:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:49,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450085335] [2024-11-22 21:41:49,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:49,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:49,234 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:49,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:49,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:49,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450085335] [2024-11-22 21:41:49,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450085335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:49,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658458635] [2024-11-22 21:41:49,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:41:49,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:49,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:49,558 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:49,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-22 21:41:49,630 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:49,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:49,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:41:49,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:49,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:41:49,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:49,808 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 29 treesize of output 21 [2024-11-22 21:41:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:49,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:49,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:49,993 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 158 treesize of output 154 [2024-11-22 21:41:50,023 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:41:50,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-22 21:41:50,062 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-22 21:41:50,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 178 [2024-11-22 21:41:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:41:50,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658458635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:50,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:50,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-11-22 21:41:50,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027715123] [2024-11-22 21:41:50,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:50,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 21:41:50,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 21:41:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2024-11-22 21:41:50,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:50,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 267 transitions, 5184 flow. Second operand has 28 states, 28 states have (on average 22.0) internal successors, (616), 28 states have internal predecessors, (616), 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) [2024-11-22 21:41:50,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:50,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:50,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:51,903 INFO L124 PetriNetUnfolderBase]: 2865/5276 cut-off events. [2024-11-22 21:41:51,903 INFO L125 PetriNetUnfolderBase]: For 59672/59672 co-relation queries the response was YES. [2024-11-22 21:41:51,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28517 conditions, 5276 events. 2865/5276 cut-off events. For 59672/59672 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 34511 event pairs, 665 based on Foata normal form. 30/5285 useless extension candidates. Maximal degree in co-relation 27394. Up to 4061 conditions per place. [2024-11-22 21:41:51,943 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 152 selfloop transitions, 158 changer transitions 4/325 dead transitions. [2024-11-22 21:41:51,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 325 transitions, 6227 flow [2024-11-22 21:41:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:41:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:41:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 429 transitions. [2024-11-22 21:41:51,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55859375 [2024-11-22 21:41:51,944 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 5184 flow. Second operand 16 states and 429 transitions. [2024-11-22 21:41:51,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 325 transitions, 6227 flow [2024-11-22 21:41:52,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 325 transitions, 6009 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:52,227 INFO L231 Difference]: Finished difference. Result has 231 places, 285 transitions, 5583 flow [2024-11-22 21:41:52,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4870, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5583, PETRI_PLACES=231, PETRI_TRANSITIONS=285} [2024-11-22 21:41:52,228 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 185 predicate places. [2024-11-22 21:41:52,228 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 285 transitions, 5583 flow [2024-11-22 21:41:52,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 22.0) internal successors, (616), 28 states have internal predecessors, (616), 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) [2024-11-22 21:41:52,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:52,228 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:52,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-22 21:41:52,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-22 21:41:52,430 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:52,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash 806796282, now seen corresponding path program 12 times [2024-11-22 21:41:52,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:52,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106122984] [2024-11-22 21:41:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:41:52,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:52,443 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:41:52,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:52,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106122984] [2024-11-22 21:41:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106122984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763732601] [2024-11-22 21:41:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:41:52,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:52,626 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:52,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-22 21:41:52,696 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:41:52,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:52,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:41:52,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:52,819 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 15 treesize of output 7 [2024-11-22 21:41:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:52,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:52,912 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:52,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:52,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763732601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:52,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:52,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2024-11-22 21:41:52,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555258237] [2024-11-22 21:41:52,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:52,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:41:52,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:41:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:41:53,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:53,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 285 transitions, 5583 flow. Second operand has 16 states, 16 states have (on average 22.6875) internal successors, (363), 16 states have internal predecessors, (363), 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) [2024-11-22 21:41:53,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:53,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:53,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:53,992 INFO L124 PetriNetUnfolderBase]: 2731/5023 cut-off events. [2024-11-22 21:41:53,992 INFO L125 PetriNetUnfolderBase]: For 61316/61316 co-relation queries the response was YES. [2024-11-22 21:41:54,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28747 conditions, 5023 events. 2731/5023 cut-off events. For 61316/61316 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 32465 event pairs, 678 based on Foata normal form. 56/5063 useless extension candidates. Maximal degree in co-relation 27613. Up to 4019 conditions per place. [2024-11-22 21:41:54,021 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 164 selfloop transitions, 130 changer transitions 0/305 dead transitions. [2024-11-22 21:41:54,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 305 transitions, 6279 flow [2024-11-22 21:41:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-11-22 21:41:54,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-22 21:41:54,022 INFO L175 Difference]: Start difference. First operand has 231 places, 285 transitions, 5583 flow. Second operand 9 states and 252 transitions. [2024-11-22 21:41:54,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 305 transitions, 6279 flow [2024-11-22 21:41:54,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 305 transitions, 5949 flow, removed 53 selfloop flow, removed 11 redundant places. [2024-11-22 21:41:54,287 INFO L231 Difference]: Finished difference. Result has 224 places, 278 transitions, 5505 flow [2024-11-22 21:41:54,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5505, PETRI_PLACES=224, PETRI_TRANSITIONS=278} [2024-11-22 21:41:54,288 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 178 predicate places. [2024-11-22 21:41:54,288 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 278 transitions, 5505 flow [2024-11-22 21:41:54,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.6875) internal successors, (363), 16 states have internal predecessors, (363), 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) [2024-11-22 21:41:54,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:54,288 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:54,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-22 21:41:54,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:54,489 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:54,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash 310782910, now seen corresponding path program 12 times [2024-11-22 21:41:54,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:54,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354510776] [2024-11-22 21:41:54,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:41:54,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:54,503 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:41:54,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:54,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354510776] [2024-11-22 21:41:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354510776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:54,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:54,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:54,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321290310] [2024-11-22 21:41:54,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:54,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:54,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:54,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:54,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:54,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 278 transitions, 5505 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:54,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:54,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:54,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:55,560 INFO L124 PetriNetUnfolderBase]: 2763/5111 cut-off events. [2024-11-22 21:41:55,560 INFO L125 PetriNetUnfolderBase]: For 62291/62363 co-relation queries the response was YES. [2024-11-22 21:41:55,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28910 conditions, 5111 events. 2763/5111 cut-off events. For 62291/62363 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 33397 event pairs, 696 based on Foata normal form. 16/5102 useless extension candidates. Maximal degree in co-relation 28079. Up to 4447 conditions per place. [2024-11-22 21:41:55,589 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 179 selfloop transitions, 104 changer transitions 8/302 dead transitions. [2024-11-22 21:41:55,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 302 transitions, 6317 flow [2024-11-22 21:41:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-11-22 21:41:55,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-22 21:41:55,590 INFO L175 Difference]: Start difference. First operand has 224 places, 278 transitions, 5505 flow. Second operand 9 states and 243 transitions. [2024-11-22 21:41:55,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 302 transitions, 6317 flow [2024-11-22 21:41:55,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 302 transitions, 6080 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-22 21:41:55,801 INFO L231 Difference]: Finished difference. Result has 226 places, 281 transitions, 5603 flow [2024-11-22 21:41:55,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5278, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5603, PETRI_PLACES=226, PETRI_TRANSITIONS=281} [2024-11-22 21:41:55,802 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 180 predicate places. [2024-11-22 21:41:55,802 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 281 transitions, 5603 flow [2024-11-22 21:41:55,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:55,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:55,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:55,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-11-22 21:41:55,802 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:55,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2116711566, now seen corresponding path program 13 times [2024-11-22 21:41:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:55,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478618453] [2024-11-22 21:41:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:41:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:55,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:55,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478618453] [2024-11-22 21:41:55,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478618453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:55,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:55,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:55,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919188850] [2024-11-22 21:41:55,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:55,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:55,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:55,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:56,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:56,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 281 transitions, 5603 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:56,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:56,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:56,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:56,794 INFO L124 PetriNetUnfolderBase]: 2739/5071 cut-off events. [2024-11-22 21:41:56,794 INFO L125 PetriNetUnfolderBase]: For 61427/61499 co-relation queries the response was YES. [2024-11-22 21:41:56,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28514 conditions, 5071 events. 2739/5071 cut-off events. For 61427/61499 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 33243 event pairs, 676 based on Foata normal form. 16/5062 useless extension candidates. Maximal degree in co-relation 27388. Up to 4447 conditions per place. [2024-11-22 21:41:56,831 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 185 selfloop transitions, 99 changer transitions 6/301 dead transitions. [2024-11-22 21:41:56,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 301 transitions, 6316 flow [2024-11-22 21:41:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-11-22 21:41:56,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-11-22 21:41:56,833 INFO L175 Difference]: Start difference. First operand has 226 places, 281 transitions, 5603 flow. Second operand 9 states and 242 transitions. [2024-11-22 21:41:56,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 301 transitions, 6316 flow [2024-11-22 21:41:57,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 301 transitions, 6113 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:57,122 INFO L231 Difference]: Finished difference. Result has 229 places, 282 transitions, 5657 flow [2024-11-22 21:41:57,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5408, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5657, PETRI_PLACES=229, PETRI_TRANSITIONS=282} [2024-11-22 21:41:57,123 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 183 predicate places. [2024-11-22 21:41:57,123 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 282 transitions, 5657 flow [2024-11-22 21:41:57,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:57,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:57,123 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:57,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-11-22 21:41:57,123 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:57,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1346730522, now seen corresponding path program 14 times [2024-11-22 21:41:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:57,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657910232] [2024-11-22 21:41:57,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:57,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:57,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:57,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:57,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657910232] [2024-11-22 21:41:57,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657910232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:57,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:57,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:41:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199766535] [2024-11-22 21:41:57,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:57,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:41:57,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:57,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:41:57,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:41:57,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:57,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 282 transitions, 5657 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:57,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:57,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:58,121 INFO L124 PetriNetUnfolderBase]: 2735/5039 cut-off events. [2024-11-22 21:41:58,121 INFO L125 PetriNetUnfolderBase]: For 64014/64086 co-relation queries the response was YES. [2024-11-22 21:41:58,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28653 conditions, 5039 events. 2735/5039 cut-off events. For 64014/64086 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 32751 event pairs, 689 based on Foata normal form. 16/5030 useless extension candidates. Maximal degree in co-relation 27526. Up to 4463 conditions per place. [2024-11-22 21:41:58,162 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 180 selfloop transitions, 112 changer transitions 3/306 dead transitions. [2024-11-22 21:41:58,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 306 transitions, 6577 flow [2024-11-22 21:41:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:41:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:41:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-11-22 21:41:58,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-22 21:41:58,163 INFO L175 Difference]: Start difference. First operand has 229 places, 282 transitions, 5657 flow. Second operand 9 states and 240 transitions. [2024-11-22 21:41:58,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 306 transitions, 6577 flow [2024-11-22 21:41:58,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 306 transitions, 6333 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-11-22 21:41:58,487 INFO L231 Difference]: Finished difference. Result has 228 places, 293 transitions, 5967 flow [2024-11-22 21:41:58,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5436, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5967, PETRI_PLACES=228, PETRI_TRANSITIONS=293} [2024-11-22 21:41:58,487 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 182 predicate places. [2024-11-22 21:41:58,487 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 293 transitions, 5967 flow [2024-11-22 21:41:58,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:41:58,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:58,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:41:58,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-11-22 21:41:58,488 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:58,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550902, now seen corresponding path program 15 times [2024-11-22 21:41:58,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:58,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380627107] [2024-11-22 21:41:58,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:41:58,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:58,504 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:41:58,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:58,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:58,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380627107] [2024-11-22 21:41:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380627107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:58,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190126363] [2024-11-22 21:41:58,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:41:58,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:58,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:58,747 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:58,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-22 21:41:58,825 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:41:58,825 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:58,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:41:58,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:58,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:41:58,955 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 29 treesize of output 21 [2024-11-22 21:41:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:58,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:59,073 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-22 21:41:59,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-22 21:41:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:41:59,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190126363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:59,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:59,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-22 21:41:59,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386015296] [2024-11-22 21:41:59,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:59,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:41:59,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:59,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:41:59,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:41:59,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-22 21:41:59,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 293 transitions, 5967 flow. Second operand has 18 states, 18 states have (on average 22.555555555555557) internal successors, (406), 18 states have internal predecessors, (406), 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) [2024-11-22 21:41:59,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:59,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-22 21:41:59,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand