./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-word-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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:46:13,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:46:13,147 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:46:13,152 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:46:13,152 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:46:13,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:46:13,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:46:13,176 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:46:13,177 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:46:13,177 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:46:13,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:46:13,178 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:46:13,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:46:13,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:46:13,179 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:46:13,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:46:13,180 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:46:13,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:46:13,183 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:46:13,183 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:46:13,183 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:46:13,184 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:46:13,184 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:46:13,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:46:13,184 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:46:13,184 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:46:13,184 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:46:13,184 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:46:13,185 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:46:13,185 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:46:13,185 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:46:13,185 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:46:13,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:46:13,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:46:13,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:46:13,185 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:46:13,186 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:46:13,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:46:13,186 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:46:13,186 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:46:13,186 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:46:13,187 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:46:13,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-19 09:46:13,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:46:13,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:46:13,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:46:13,417 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:46:13,418 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:46:13,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-19 09:46:15,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:46:15,464 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:46:15,465 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-19 09:46:15,474 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d38687128/9f095dd637f14193ba726b90a47ba42a/FLAG9d9455374 [2024-11-19 09:46:15,854 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d38687128/9f095dd637f14193ba726b90a47ba42a [2024-11-19 09:46:15,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:46:15,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:46:15,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:46:15,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:46:15,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:46:15,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:46:15" (1/1) ... [2024-11-19 09:46:15,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b5da149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:15, skipping insertion in model container [2024-11-19 09:46:15,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:46:15" (1/1) ... [2024-11-19 09:46:15,887 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:46:16,047 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:46:16,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:46:16,057 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:46:16,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:46:16,091 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:46:16,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16 WrapperNode [2024-11-19 09:46:16,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:46:16,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:46:16,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:46:16,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:46:16,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,124 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 125 [2024-11-19 09:46:16,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:46:16,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:46:16,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:46:16,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:46:16,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,147 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,166 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2024-11-19 09:46:16,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,167 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,174 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:46:16,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:46:16,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:46:16,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:46:16,194 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (1/1) ... [2024-11-19 09:46:16,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:46:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:16,224 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) [2024-11-19 09:46:16,226 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 [2024-11-19 09:46:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:46:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:46:16,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:46:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:46:16,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:46:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:46:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:46:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:46:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:46:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:46:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:46:16,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:46:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:46:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:46:16,269 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:46:16,368 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:46:16,370 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:46:16,625 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:46:16,626 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:46:16,823 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:46:16,823 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:46:16,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:46:16 BoogieIcfgContainer [2024-11-19 09:46:16,823 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:46:16,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:46:16,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:46:16,828 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:46:16,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:46:15" (1/3) ... [2024-11-19 09:46:16,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e1809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:46:16, skipping insertion in model container [2024-11-19 09:46:16,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:16" (2/3) ... [2024-11-19 09:46:16,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e1809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:46:16, skipping insertion in model container [2024-11-19 09:46:16,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:46:16" (3/3) ... [2024-11-19 09:46:16,832 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-19 09:46:16,846 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:46:16,846 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-19 09:46:16,846 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:46:16,887 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:46:16,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-19 09:46:16,938 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-19 09:46:16,939 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:46:16,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-19 09:46:16,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-19 09:46:16,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-19 09:46:16,954 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:46:16,960 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;@119027f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:46:16,961 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-19 09:46:16,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:46:16,966 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:46:16,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:46:16,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:16,967 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:46:16,967 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:16,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash 580331, now seen corresponding path program 1 times [2024-11-19 09:46:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:16,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056642835] [2024-11-19 09:46:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:16,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:17,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:17,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056642835] [2024-11-19 09:46:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056642835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:17,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:46:17,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376514765] [2024-11-19 09:46:17,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:17,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:46:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:17,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:46:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:46:17,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:46:17,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:17,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:17,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:46:17,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:17,388 INFO L124 PetriNetUnfolderBase]: 233/554 cut-off events. [2024-11-19 09:46:17,388 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-19 09:46:17,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 554 events. 233/554 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2985 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 872. Up to 354 conditions per place. [2024-11-19 09:46:17,394 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 30 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-19 09:46:17,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2024-11-19 09:46:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:46:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:46:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-19 09:46:17,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2024-11-19 09:46:17,405 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 125 transitions. [2024-11-19 09:46:17,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2024-11-19 09:46:17,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:46:17,411 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-19 09:46:17,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-19 09:46:17,416 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-19 09:46:17,416 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-19 09:46:17,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:17,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:17,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:46:17,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:46:17,418 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:17,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash 580332, now seen corresponding path program 1 times [2024-11-19 09:46:17,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:17,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663898662] [2024-11-19 09:46:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:17,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:17,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:17,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663898662] [2024-11-19 09:46:17,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663898662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:17,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:17,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:46:17,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776284108] [2024-11-19 09:46:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:17,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:46:17,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:17,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:46:17,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:46:17,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:46:17,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:17,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:17,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:46:17,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:17,826 INFO L124 PetriNetUnfolderBase]: 234/557 cut-off events. [2024-11-19 09:46:17,826 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 09:46:17,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 557 events. 234/557 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3000 event pairs, 138 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 905. Up to 363 conditions per place. [2024-11-19 09:46:17,832 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 33 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-19 09:46:17,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 206 flow [2024-11-19 09:46:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:46:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:46:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-19 09:46:17,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-11-19 09:46:17,835 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 4 states and 158 transitions. [2024-11-19 09:46:17,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 206 flow [2024-11-19 09:46:17,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:17,839 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 149 flow [2024-11-19 09:46:17,839 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-11-19 09:46:17,840 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-11-19 09:46:17,841 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 149 flow [2024-11-19 09:46:17,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:17,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:17,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:46:17,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:46:17,841 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:17,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 17991939, now seen corresponding path program 1 times [2024-11-19 09:46:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967649888] [2024-11-19 09:46:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:17,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:17,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:17,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967649888] [2024-11-19 09:46:17,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967649888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:17,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:17,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:17,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105623417] [2024-11-19 09:46:17,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:17,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:18,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:46:18,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:18,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:18,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:46:18,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:18,217 INFO L124 PetriNetUnfolderBase]: 235/560 cut-off events. [2024-11-19 09:46:18,217 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 09:46:18,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 560 events. 235/560 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3026 event pairs, 138 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 926. Up to 362 conditions per place. [2024-11-19 09:46:18,221 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 33 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-19 09:46:18,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 235 flow [2024-11-19 09:46:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-19 09:46:18,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787878787878787 [2024-11-19 09:46:18,226 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 149 flow. Second operand 5 states and 191 transitions. [2024-11-19 09:46:18,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 235 flow [2024-11-19 09:46:18,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:18,228 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 183 flow [2024-11-19 09:46:18,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-19 09:46:18,230 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-19 09:46:18,230 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 183 flow [2024-11-19 09:46:18,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:18,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:18,230 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:46:18,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:46:18,230 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:18,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash 557718160, now seen corresponding path program 1 times [2024-11-19 09:46:18,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:18,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117656714] [2024-11-19 09:46:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:18,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:18,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:18,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117656714] [2024-11-19 09:46:18,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117656714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:18,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014512514] [2024-11-19 09:46:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:18,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:18,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:18,394 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) [2024-11-19 09:46:18,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:46:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:18,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:46:18,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:18,526 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 [2024-11-19 09:46:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:18,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014512514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:18,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:18,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:46:18,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662535919] [2024-11-19 09:46:18,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:18,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:46:18,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:46:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:46:19,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:46:19,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:19,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:19,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:46:19,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:19,301 INFO L124 PetriNetUnfolderBase]: 236/562 cut-off events. [2024-11-19 09:46:19,301 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:46:19,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 562 events. 236/562 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3043 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 936. Up to 363 conditions per place. [2024-11-19 09:46:19,304 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 32 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-11-19 09:46:19,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 278 flow [2024-11-19 09:46:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:46:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:46:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-11-19 09:46:19,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5321969696969697 [2024-11-19 09:46:19,306 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 183 flow. Second operand 8 states and 281 transitions. [2024-11-19 09:46:19,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 278 flow [2024-11-19 09:46:19,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:19,308 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 213 flow [2024-11-19 09:46:19,308 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-19 09:46:19,308 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-19 09:46:19,309 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 213 flow [2024-11-19 09:46:19,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:19,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:19,309 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:46:19,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:46:19,513 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 [2024-11-19 09:46:19,514 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:19,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 110403512, now seen corresponding path program 1 times [2024-11-19 09:46:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:19,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023193135] [2024-11-19 09:46:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:19,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:19,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:19,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023193135] [2024-11-19 09:46:19,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023193135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:19,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549222351] [2024-11-19 09:46:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:19,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:19,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:19,683 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) [2024-11-19 09:46:19,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:46:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:19,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:46:19,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:19,744 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 [2024-11-19 09:46:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:19,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:20,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549222351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:20,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:20,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:46:20,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588985485] [2024-11-19 09:46:20,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:20,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:46:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:46:20,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:20,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:46:20,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:20,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:20,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:46:20,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:20,699 INFO L124 PetriNetUnfolderBase]: 236/561 cut-off events. [2024-11-19 09:46:20,700 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:46:20,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 561 events. 236/561 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3046 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 935. Up to 354 conditions per place. [2024-11-19 09:46:20,711 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 26 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-11-19 09:46:20,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 291 flow [2024-11-19 09:46:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:46:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:46:20,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 249 transitions. [2024-11-19 09:46:20,712 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-11-19 09:46:20,712 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 213 flow. Second operand 7 states and 249 transitions. [2024-11-19 09:46:20,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 291 flow [2024-11-19 09:46:20,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 244 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-19 09:46:20,714 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 192 flow [2024-11-19 09:46:20,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-19 09:46:20,714 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-19 09:46:20,715 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 192 flow [2024-11-19 09:46:20,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:20,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:20,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:20,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:46:20,919 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 [2024-11-19 09:46:20,920 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:20,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:20,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1179744335, now seen corresponding path program 1 times [2024-11-19 09:46:20,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:20,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526321097] [2024-11-19 09:46:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:20,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:20,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:20,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526321097] [2024-11-19 09:46:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526321097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:20,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:20,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:46:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264630046] [2024-11-19 09:46:20,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:20,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:20,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:20,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:20,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:46:20,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:20,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:20,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:46:20,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:21,137 INFO L124 PetriNetUnfolderBase]: 436/1017 cut-off events. [2024-11-19 09:46:21,137 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-19 09:46:21,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1017 events. 436/1017 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6237 event pairs, 234 based on Foata normal form. 0/690 useless extension candidates. Maximal degree in co-relation 1049. Up to 409 conditions per place. [2024-11-19 09:46:21,141 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 75 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2024-11-19 09:46:21,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 467 flow [2024-11-19 09:46:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 263 transitions. [2024-11-19 09:46:21,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6641414141414141 [2024-11-19 09:46:21,142 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 192 flow. Second operand 6 states and 263 transitions. [2024-11-19 09:46:21,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 467 flow [2024-11-19 09:46:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 426 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-19 09:46:21,145 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 210 flow [2024-11-19 09:46:21,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-19 09:46:21,145 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-19 09:46:21,145 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 210 flow [2024-11-19 09:46:21,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:21,146 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:21,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:46:21,146 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:21,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash 148683071, now seen corresponding path program 1 times [2024-11-19 09:46:21,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416204585] [2024-11-19 09:46:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:21,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:21,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416204585] [2024-11-19 09:46:21,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416204585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:21,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:21,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300062797] [2024-11-19 09:46:21,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:21,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:46:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:46:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:46:21,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-19 09:46:21,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:21,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-19 09:46:21,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:21,332 INFO L124 PetriNetUnfolderBase]: 532/1174 cut-off events. [2024-11-19 09:46:21,332 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-19 09:46:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 1174 events. 532/1174 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6996 event pairs, 356 based on Foata normal form. 0/942 useless extension candidates. Maximal degree in co-relation 1320. Up to 832 conditions per place. [2024-11-19 09:46:21,337 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 44 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-19 09:46:21,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 298 flow [2024-11-19 09:46:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:46:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:46:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-19 09:46:21,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2024-11-19 09:46:21,339 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 210 flow. Second operand 4 states and 131 transitions. [2024-11-19 09:46:21,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 298 flow [2024-11-19 09:46:21,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:21,343 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 205 flow [2024-11-19 09:46:21,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-19 09:46:21,344 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-19 09:46:21,344 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 205 flow [2024-11-19 09:46:21,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:21,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:21,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:46:21,346 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:21,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:21,346 INFO L85 PathProgramCache]: Analyzing trace with hash 148683072, now seen corresponding path program 1 times [2024-11-19 09:46:21,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:21,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032404435] [2024-11-19 09:46:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:21,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032404435] [2024-11-19 09:46:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032404435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:21,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:21,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:46:21,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239674688] [2024-11-19 09:46:21,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:21,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:21,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:21,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:46:21,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:21,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:46:21,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:21,547 INFO L124 PetriNetUnfolderBase]: 390/782 cut-off events. [2024-11-19 09:46:21,547 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-11-19 09:46:21,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 782 events. 390/782 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3772 event pairs, 224 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 1073. Up to 407 conditions per place. [2024-11-19 09:46:21,549 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 68 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-19 09:46:21,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 436 flow [2024-11-19 09:46:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-19 09:46:21,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-19 09:46:21,550 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 205 flow. Second operand 6 states and 256 transitions. [2024-11-19 09:46:21,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 436 flow [2024-11-19 09:46:21,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:21,553 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 230 flow [2024-11-19 09:46:21,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-19 09:46:21,555 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2024-11-19 09:46:21,555 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 230 flow [2024-11-19 09:46:21,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:21,556 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:21,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:46:21,556 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:21,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1430032755, now seen corresponding path program 1 times [2024-11-19 09:46:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:21,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101049656] [2024-11-19 09:46:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:21,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:21,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101049656] [2024-11-19 09:46:21,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101049656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:21,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:21,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:46:21,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539517680] [2024-11-19 09:46:21,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:21,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:21,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:21,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:46:21,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:21,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:46:21,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:21,769 INFO L124 PetriNetUnfolderBase]: 688/1466 cut-off events. [2024-11-19 09:46:21,769 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-11-19 09:46:21,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 1466 events. 688/1466 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8753 event pairs, 398 based on Foata normal form. 16/1250 useless extension candidates. Maximal degree in co-relation 2077. Up to 630 conditions per place. [2024-11-19 09:46:21,775 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 77 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-11-19 09:46:21,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 527 flow [2024-11-19 09:46:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-19 09:46:21,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6848484848484848 [2024-11-19 09:46:21,776 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 230 flow. Second operand 5 states and 226 transitions. [2024-11-19 09:46:21,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 527 flow [2024-11-19 09:46:21,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:46:21,779 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 284 flow [2024-11-19 09:46:21,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-19 09:46:21,779 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-11-19 09:46:21,779 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 284 flow [2024-11-19 09:46:21,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:21,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:21,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:46:21,780 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:21,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389634, now seen corresponding path program 1 times [2024-11-19 09:46:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:21,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738748346] [2024-11-19 09:46:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:21,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:21,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:21,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738748346] [2024-11-19 09:46:21,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738748346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:21,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:21,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019393122] [2024-11-19 09:46:21,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:21,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:21,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:21,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-19 09:46:21,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:21,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:21,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-19 09:46:21,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:22,045 INFO L124 PetriNetUnfolderBase]: 766/1532 cut-off events. [2024-11-19 09:46:22,045 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-11-19 09:46:22,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 1532 events. 766/1532 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8561 event pairs, 540 based on Foata normal form. 0/1402 useless extension candidates. Maximal degree in co-relation 2237. Up to 1240 conditions per place. [2024-11-19 09:46:22,052 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 47 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-19 09:46:22,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 384 flow [2024-11-19 09:46:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-19 09:46:22,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-19 09:46:22,053 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 284 flow. Second operand 5 states and 154 transitions. [2024-11-19 09:46:22,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 384 flow [2024-11-19 09:46:22,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:22,057 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 285 flow [2024-11-19 09:46:22,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-19 09:46:22,058 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-19 09:46:22,058 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 285 flow [2024-11-19 09:46:22,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:22,058 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:22,058 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:22,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:46:22,059 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:22,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389635, now seen corresponding path program 1 times [2024-11-19 09:46:22,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:22,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603985177] [2024-11-19 09:46:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:22,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:22,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:22,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603985177] [2024-11-19 09:46:22,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603985177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:22,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376993604] [2024-11-19 09:46:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:22,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:22,214 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) [2024-11-19 09:46:22,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:46:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:22,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:46:22,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:22,279 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 [2024-11-19 09:46:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:46:22,319 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 [2024-11-19 09:46:22,341 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:46:22,342 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 [2024-11-19 09:46:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:22,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:22,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:46:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:22,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376993604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:22,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:22,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:46:22,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462040508] [2024-11-19 09:46:22,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:22,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:46:22,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:46:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:23,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-19 09:46:23,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 285 flow. Second operand has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:23,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:23,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-19 09:46:23,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:23,546 INFO L124 PetriNetUnfolderBase]: 936/1764 cut-off events. [2024-11-19 09:46:23,546 INFO L125 PetriNetUnfolderBase]: For 846/846 co-relation queries the response was YES. [2024-11-19 09:46:23,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1764 events. 936/1764 cut-off events. For 846/846 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9345 event pairs, 413 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2815. Up to 561 conditions per place. [2024-11-19 09:46:23,553 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 87 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-11-19 09:46:23,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 628 flow [2024-11-19 09:46:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 335 transitions. [2024-11-19 09:46:23,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.563973063973064 [2024-11-19 09:46:23,555 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 285 flow. Second operand 9 states and 335 transitions. [2024-11-19 09:46:23,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 628 flow [2024-11-19 09:46:23,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:46:23,558 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 351 flow [2024-11-19 09:46:23,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2024-11-19 09:46:23,558 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2024-11-19 09:46:23,558 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 351 flow [2024-11-19 09:46:23,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:23,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:23,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:23,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:23,762 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 [2024-11-19 09:46:23,762 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:23,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 139680028, now seen corresponding path program 1 times [2024-11-19 09:46:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346648819] [2024-11-19 09:46:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:23,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:23,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346648819] [2024-11-19 09:46:23,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346648819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:23,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:23,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:46:23,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623650555] [2024-11-19 09:46:23,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:23,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:23,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:23,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:23,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:23,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:46:23,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:23,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:23,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:46:23,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:24,008 INFO L124 PetriNetUnfolderBase]: 798/1569 cut-off events. [2024-11-19 09:46:24,008 INFO L125 PetriNetUnfolderBase]: For 1635/1637 co-relation queries the response was YES. [2024-11-19 09:46:24,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1569 events. 798/1569 cut-off events. For 1635/1637 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8328 event pairs, 486 based on Foata normal form. 13/1434 useless extension candidates. Maximal degree in co-relation 2680. Up to 856 conditions per place. [2024-11-19 09:46:24,015 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 74 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-11-19 09:46:24,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 632 flow [2024-11-19 09:46:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-11-19 09:46:24,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-11-19 09:46:24,016 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 351 flow. Second operand 5 states and 219 transitions. [2024-11-19 09:46:24,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 632 flow [2024-11-19 09:46:24,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 593 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-19 09:46:24,019 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 378 flow [2024-11-19 09:46:24,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-19 09:46:24,020 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 18 predicate places. [2024-11-19 09:46:24,020 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 378 flow [2024-11-19 09:46:24,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:24,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:24,020 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:24,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:46:24,020 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:24,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1186504380, now seen corresponding path program 1 times [2024-11-19 09:46:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003635200] [2024-11-19 09:46:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:24,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:24,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003635200] [2024-11-19 09:46:24,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003635200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:24,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821497086] [2024-11-19 09:46:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:24,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:24,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:24,152 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) [2024-11-19 09:46:24,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:46:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:24,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:46:24,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:24,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:24,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:46:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821497086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:24,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:24,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-19 09:46:24,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265844687] [2024-11-19 09:46:24,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:24,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:46:24,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:46:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:46:24,533 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-19 09:46:24,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:24,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:24,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-19 09:46:24,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:24,837 INFO L124 PetriNetUnfolderBase]: 837/1552 cut-off events. [2024-11-19 09:46:24,837 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-11-19 09:46:24,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1552 events. 837/1552 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7804 event pairs, 402 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 2851. Up to 521 conditions per place. [2024-11-19 09:46:24,844 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 88 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-11-19 09:46:24,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 712 flow [2024-11-19 09:46:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:46:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:46:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2024-11-19 09:46:24,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6406926406926406 [2024-11-19 09:46:24,845 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 378 flow. Second operand 7 states and 296 transitions. [2024-11-19 09:46:24,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 712 flow [2024-11-19 09:46:24,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:24,848 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 421 flow [2024-11-19 09:46:24,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-19 09:46:24,849 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2024-11-19 09:46:24,849 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 421 flow [2024-11-19 09:46:24,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:24,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:24,849 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:24,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:46:25,050 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 [2024-11-19 09:46:25,050 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:25,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:25,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1861464815, now seen corresponding path program 1 times [2024-11-19 09:46:25,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:25,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880201083] [2024-11-19 09:46:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:25,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880201083] [2024-11-19 09:46:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880201083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064624788] [2024-11-19 09:46:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:25,179 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) [2024-11-19 09:46:25,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:46:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:25,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:46:25,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:25,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:25,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:46:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064624788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:25,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-19 09:46:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524856318] [2024-11-19 09:46:25,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:25,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:46:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:46:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:46:25,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-19 09:46:25,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 421 flow. Second operand has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:25,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:25,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-19 09:46:25,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:25,863 INFO L124 PetriNetUnfolderBase]: 1180/2133 cut-off events. [2024-11-19 09:46:25,863 INFO L125 PetriNetUnfolderBase]: For 3826/3886 co-relation queries the response was YES. [2024-11-19 09:46:25,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2133 events. 1180/2133 cut-off events. For 3826/3886 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11102 event pairs, 488 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 3768. Up to 736 conditions per place. [2024-11-19 09:46:25,880 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 97 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-11-19 09:46:25,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 883 flow [2024-11-19 09:46:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:46:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:46:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 289 transitions. [2024-11-19 09:46:25,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255411255411255 [2024-11-19 09:46:25,883 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 421 flow. Second operand 7 states and 289 transitions. [2024-11-19 09:46:25,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 883 flow [2024-11-19 09:46:25,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 842 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-19 09:46:25,887 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 461 flow [2024-11-19 09:46:25,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-11-19 09:46:25,888 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 25 predicate places. [2024-11-19 09:46:25,888 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 461 flow [2024-11-19 09:46:25,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:25,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:25,888 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:25,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:46:26,091 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 [2024-11-19 09:46:26,092 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:26,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1870833853, now seen corresponding path program 1 times [2024-11-19 09:46:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:26,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786448794] [2024-11-19 09:46:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:26,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:26,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786448794] [2024-11-19 09:46:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786448794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916842370] [2024-11-19 09:46:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:26,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:26,244 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) [2024-11-19 09:46:26,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:46:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:26,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:46:26,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:26,309 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 [2024-11-19 09:46:26,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:46:26,347 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 [2024-11-19 09:46:26,353 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:46:26,353 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 [2024-11-19 09:46:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:26,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:26,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:46:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916842370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:26,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:26,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:46:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143956048] [2024-11-19 09:46:26,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:26,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:46:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:46:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:30,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:46:34,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:46:38,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:46:42,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:46:46,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:46:50,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:46:54,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:46:54,975 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 66 [2024-11-19 09:46:54,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 461 flow. Second operand has 13 states, 13 states have (on average 22.46153846153846) internal successors, (292), 13 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:54,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:54,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 66 [2024-11-19 09:46:54,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:55,434 INFO L124 PetriNetUnfolderBase]: 1148/2066 cut-off events. [2024-11-19 09:46:55,434 INFO L125 PetriNetUnfolderBase]: For 3743/3791 co-relation queries the response was YES. [2024-11-19 09:46:55,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 2066 events. 1148/2066 cut-off events. For 3743/3791 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10542 event pairs, 509 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 3896. Up to 781 conditions per place. [2024-11-19 09:46:55,445 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 101 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-11-19 09:46:55,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 925 flow [2024-11-19 09:46:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-11-19 09:46:55,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4713804713804714 [2024-11-19 09:46:55,447 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 461 flow. Second operand 9 states and 280 transitions. [2024-11-19 09:46:55,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 925 flow [2024-11-19 09:46:55,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 893 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-19 09:46:55,451 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 484 flow [2024-11-19 09:46:55,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=484, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-11-19 09:46:55,452 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-11-19 09:46:55,452 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 484 flow [2024-11-19 09:46:55,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.46153846153846) internal successors, (292), 13 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:55,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:55,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:55,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:55,653 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 [2024-11-19 09:46:55,654 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:55,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -428318647, now seen corresponding path program 1 times [2024-11-19 09:46:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:55,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004594669] [2024-11-19 09:46:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:55,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:55,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:55,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004594669] [2024-11-19 09:46:55,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004594669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:55,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276235333] [2024-11-19 09:46:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:55,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:55,730 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) [2024-11-19 09:46:55,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:46:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:55,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:46:55,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:55,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:55,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276235333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:55,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:55,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-19 09:46:55,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266807037] [2024-11-19 09:46:55,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:55,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:46:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:46:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:46:56,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:46:56,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 484 flow. Second operand has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:56,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:56,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:46:56,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:56,775 INFO L124 PetriNetUnfolderBase]: 2792/5128 cut-off events. [2024-11-19 09:46:56,775 INFO L125 PetriNetUnfolderBase]: For 11852/11963 co-relation queries the response was YES. [2024-11-19 09:46:56,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 5128 events. 2792/5128 cut-off events. For 11852/11963 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33079 event pairs, 1093 based on Foata normal form. 72/5122 useless extension candidates. Maximal degree in co-relation 8028. Up to 1002 conditions per place. [2024-11-19 09:46:56,798 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 231 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-11-19 09:46:56,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 295 transitions, 2281 flow [2024-11-19 09:46:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 09:46:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-19 09:46:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 931 transitions. [2024-11-19 09:46:56,801 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133069828722003 [2024-11-19 09:46:56,801 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 484 flow. Second operand 23 states and 931 transitions. [2024-11-19 09:46:56,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 295 transitions, 2281 flow [2024-11-19 09:46:56,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 295 transitions, 2192 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-11-19 09:46:56,813 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 843 flow [2024-11-19 09:46:56,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=843, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2024-11-19 09:46:56,813 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 51 predicate places. [2024-11-19 09:46:56,813 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 843 flow [2024-11-19 09:46:56,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:56,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:56,814 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:56,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:46:57,014 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 [2024-11-19 09:46:57,015 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:57,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1294948663, now seen corresponding path program 1 times [2024-11-19 09:46:57,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:57,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418976630] [2024-11-19 09:46:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:57,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:57,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418976630] [2024-11-19 09:46:57,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418976630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:57,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:46:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788210426] [2024-11-19 09:46:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:57,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:46:57,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:46:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:46:57,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:46:57,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:57,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:57,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:46:57,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:57,509 INFO L124 PetriNetUnfolderBase]: 3045/5859 cut-off events. [2024-11-19 09:46:57,509 INFO L125 PetriNetUnfolderBase]: For 15824/16010 co-relation queries the response was YES. [2024-11-19 09:46:57,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17784 conditions, 5859 events. 3045/5859 cut-off events. For 15824/16010 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 42099 event pairs, 1702 based on Foata normal form. 54/5759 useless extension candidates. Maximal degree in co-relation 12853. Up to 3869 conditions per place. [2024-11-19 09:46:57,535 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 106 selfloop transitions, 1 changer transitions 9/133 dead transitions. [2024-11-19 09:46:57,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 133 transitions, 1192 flow [2024-11-19 09:46:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:46:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:46:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-19 09:46:57,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2024-11-19 09:46:57,536 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 843 flow. Second operand 4 states and 182 transitions. [2024-11-19 09:46:57,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 133 transitions, 1192 flow [2024-11-19 09:46:57,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1155 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-19 09:46:57,549 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 821 flow [2024-11-19 09:46:57,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2024-11-19 09:46:57,550 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 50 predicate places. [2024-11-19 09:46:57,550 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 821 flow [2024-11-19 09:46:57,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:57,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:57,551 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:57,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:46:57,551 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:57,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash 725935119, now seen corresponding path program 2 times [2024-11-19 09:46:57,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:57,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443494658] [2024-11-19 09:46:57,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:46:57,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:57,568 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:46:57,569 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:57,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:57,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443494658] [2024-11-19 09:46:57,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443494658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:57,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:57,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:46:57,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763798304] [2024-11-19 09:46:57,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:57,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:46:57,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:46:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:46:57,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:46:57,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 821 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:57,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:57,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:46:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:58,110 INFO L124 PetriNetUnfolderBase]: 3285/6382 cut-off events. [2024-11-19 09:46:58,110 INFO L125 PetriNetUnfolderBase]: For 17855/18110 co-relation queries the response was YES. [2024-11-19 09:46:58,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19389 conditions, 6382 events. 3285/6382 cut-off events. For 17855/18110 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 47223 event pairs, 2166 based on Foata normal form. 45/6173 useless extension candidates. Maximal degree in co-relation 19257. Up to 4692 conditions per place. [2024-11-19 09:46:58,136 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 117 selfloop transitions, 1 changer transitions 7/142 dead transitions. [2024-11-19 09:46:58,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 142 transitions, 1328 flow [2024-11-19 09:46:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:46:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:46:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-19 09:46:58,138 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-19 09:46:58,138 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 821 flow. Second operand 4 states and 180 transitions. [2024-11-19 09:46:58,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 142 transitions, 1328 flow [2024-11-19 09:46:58,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 142 transitions, 1322 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:58,159 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 843 flow [2024-11-19 09:46:58,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=843, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2024-11-19 09:46:58,159 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2024-11-19 09:46:58,159 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 843 flow [2024-11-19 09:46:58,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:58,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:58,160 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:58,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 09:46:58,160 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:58,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1779849144, now seen corresponding path program 1 times [2024-11-19 09:46:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:58,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493085700] [2024-11-19 09:46:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493085700] [2024-11-19 09:46:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493085700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331473613] [2024-11-19 09:46:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:58,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:58,224 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) [2024-11-19 09:46:58,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:46:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:58,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:46:58,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:58,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:58,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331473613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:58,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:58,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-19 09:46:58,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247283583] [2024-11-19 09:46:58,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:58,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:46:58,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:58,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:46:58,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:46:58,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:46:58,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 843 flow. Second operand has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:58,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:58,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:46:58,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:59,251 INFO L124 PetriNetUnfolderBase]: 3043/5753 cut-off events. [2024-11-19 09:46:59,251 INFO L125 PetriNetUnfolderBase]: For 18205/18454 co-relation queries the response was YES. [2024-11-19 09:46:59,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18248 conditions, 5753 events. 3043/5753 cut-off events. For 18205/18454 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39881 event pairs, 1735 based on Foata normal form. 72/5740 useless extension candidates. Maximal degree in co-relation 18115. Up to 1247 conditions per place. [2024-11-19 09:46:59,273 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 209 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-11-19 09:46:59,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 271 transitions, 2279 flow [2024-11-19 09:46:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 09:46:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-19 09:46:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 860 transitions. [2024-11-19 09:46:59,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6204906204906205 [2024-11-19 09:46:59,275 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 843 flow. Second operand 21 states and 860 transitions. [2024-11-19 09:46:59,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 271 transitions, 2279 flow [2024-11-19 09:46:59,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 271 transitions, 2267 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:59,295 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 1138 flow [2024-11-19 09:46:59,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1138, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2024-11-19 09:46:59,295 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2024-11-19 09:46:59,295 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 1138 flow [2024-11-19 09:46:59,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:59,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:59,296 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:59,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:46:59,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:59,496 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:59,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:59,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1069275252, now seen corresponding path program 1 times [2024-11-19 09:46:59,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:59,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394251565] [2024-11-19 09:46:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:59,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:59,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394251565] [2024-11-19 09:46:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394251565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:59,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:59,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:59,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640065393] [2024-11-19 09:46:59,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:59,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:46:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:46:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:46:59,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:46:59,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 1138 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) [2024-11-19 09:46:59,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:59,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:46:59,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:59,827 INFO L124 PetriNetUnfolderBase]: 2161/4301 cut-off events. [2024-11-19 09:46:59,828 INFO L125 PetriNetUnfolderBase]: For 17968/18148 co-relation queries the response was YES. [2024-11-19 09:46:59,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14644 conditions, 4301 events. 2161/4301 cut-off events. For 17968/18148 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 29335 event pairs, 818 based on Foata normal form. 209/4448 useless extension candidates. Maximal degree in co-relation 10716. Up to 3107 conditions per place. [2024-11-19 09:46:59,844 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 111 selfloop transitions, 18 changer transitions 5/151 dead transitions. [2024-11-19 09:46:59,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 151 transitions, 1664 flow [2024-11-19 09:46:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:46:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:46:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-19 09:46:59,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7070707070707071 [2024-11-19 09:46:59,845 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 1138 flow. Second operand 3 states and 140 transitions. [2024-11-19 09:46:59,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 151 transitions, 1664 flow [2024-11-19 09:46:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 151 transitions, 1623 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-19 09:46:59,859 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1415 flow [2024-11-19 09:46:59,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1415, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-11-19 09:46:59,860 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 69 predicate places. [2024-11-19 09:46:59,860 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1415 flow [2024-11-19 09:46:59,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) [2024-11-19 09:46:59,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:59,860 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:59,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:46:59,860 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:46:59,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:59,860 INFO L85 PathProgramCache]: Analyzing trace with hash -701278822, now seen corresponding path program 2 times [2024-11-19 09:46:59,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:59,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563892715] [2024-11-19 09:46:59,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:46:59,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:59,911 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:46:59,911 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:47:00,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:00,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563892715] [2024-11-19 09:47:00,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563892715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:00,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025513021] [2024-11-19 09:47:00,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:00,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:00,258 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) [2024-11-19 09:47:00,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:47:00,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:00,324 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:00,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:47:00,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:00,333 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 [2024-11-19 09:47:00,391 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:47:00,391 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 [2024-11-19 09:47:00,403 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 [2024-11-19 09:47:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:00,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:00,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:47:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:00,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025513021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:00,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:00,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-19 09:47:00,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939785649] [2024-11-19 09:47:00,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:00,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:47:00,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:47:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:47:01,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-19 09:47:01,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1415 flow. Second operand has 21 states, 21 states have (on average 26.428571428571427) internal successors, (555), 21 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:01,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:01,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-19 09:47:01,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:03,352 INFO L124 PetriNetUnfolderBase]: 3253/5791 cut-off events. [2024-11-19 09:47:03,352 INFO L125 PetriNetUnfolderBase]: For 25825/25863 co-relation queries the response was YES. [2024-11-19 09:47:03,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20703 conditions, 5791 events. 3253/5791 cut-off events. For 25825/25863 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 35525 event pairs, 872 based on Foata normal form. 56/5837 useless extension candidates. Maximal degree in co-relation 15918. Up to 1058 conditions per place. [2024-11-19 09:47:03,387 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 238 selfloop transitions, 66 changer transitions 0/314 dead transitions. [2024-11-19 09:47:03,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 314 transitions, 3189 flow [2024-11-19 09:47:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 09:47:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 09:47:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 670 transitions. [2024-11-19 09:47:03,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-11-19 09:47:03,389 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1415 flow. Second operand 20 states and 670 transitions. [2024-11-19 09:47:03,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 314 transitions, 3189 flow [2024-11-19 09:47:03,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 314 transitions, 3059 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-11-19 09:47:03,414 INFO L231 Difference]: Finished difference. Result has 146 places, 150 transitions, 1585 flow [2024-11-19 09:47:03,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1585, PETRI_PLACES=146, PETRI_TRANSITIONS=150} [2024-11-19 09:47:03,415 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 84 predicate places. [2024-11-19 09:47:03,415 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 150 transitions, 1585 flow [2024-11-19 09:47:03,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 26.428571428571427) internal successors, (555), 21 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:03,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:03,415 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] [2024-11-19 09:47:03,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:47:03,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:03,619 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:03,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1503532602, now seen corresponding path program 1 times [2024-11-19 09:47:03,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:03,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827675794] [2024-11-19 09:47:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:03,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:03,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827675794] [2024-11-19 09:47:03,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827675794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:03,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:03,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:47:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442298727] [2024-11-19 09:47:03,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:03,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:47:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:47:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:47:03,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:03,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 150 transitions, 1585 flow. Second operand has 6 states, 6 states have (on average 35.333333333333336) internal successors, (212), 6 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:03,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:03,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:03,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:04,198 INFO L124 PetriNetUnfolderBase]: 2575/4845 cut-off events. [2024-11-19 09:47:04,198 INFO L125 PetriNetUnfolderBase]: For 27949/28127 co-relation queries the response was YES. [2024-11-19 09:47:04,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18530 conditions, 4845 events. 2575/4845 cut-off events. For 27949/28127 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 31863 event pairs, 970 based on Foata normal form. 7/4716 useless extension candidates. Maximal degree in co-relation 13854. Up to 2343 conditions per place. [2024-11-19 09:47:04,225 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 155 selfloop transitions, 34 changer transitions 19/227 dead transitions. [2024-11-19 09:47:04,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 2770 flow [2024-11-19 09:47:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:47:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:47:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 262 transitions. [2024-11-19 09:47:04,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6616161616161617 [2024-11-19 09:47:04,226 INFO L175 Difference]: Start difference. First operand has 146 places, 150 transitions, 1585 flow. Second operand 6 states and 262 transitions. [2024-11-19 09:47:04,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 2770 flow [2024-11-19 09:47:04,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 227 transitions, 2684 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-11-19 09:47:04,249 INFO L231 Difference]: Finished difference. Result has 141 places, 172 transitions, 1925 flow [2024-11-19 09:47:04,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1925, PETRI_PLACES=141, PETRI_TRANSITIONS=172} [2024-11-19 09:47:04,250 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 79 predicate places. [2024-11-19 09:47:04,250 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 172 transitions, 1925 flow [2024-11-19 09:47:04,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.333333333333336) internal successors, (212), 6 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:04,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:04,250 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:04,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-19 09:47:04,250 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:04,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -264806459, now seen corresponding path program 1 times [2024-11-19 09:47:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803060111] [2024-11-19 09:47:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:04,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:04,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803060111] [2024-11-19 09:47:04,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803060111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:04,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121321441] [2024-11-19 09:47:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:04,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:04,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:04,427 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) [2024-11-19 09:47:04,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:47:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:04,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:47:04,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:04,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:04,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:47:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:04,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121321441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:04,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:04,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-19 09:47:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220793524] [2024-11-19 09:47:04,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:04,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:47:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:04,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:47:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:47:05,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-19 09:47:05,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 172 transitions, 1925 flow. Second operand has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:05,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:05,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-19 09:47:05,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:05,852 INFO L124 PetriNetUnfolderBase]: 2789/5220 cut-off events. [2024-11-19 09:47:05,853 INFO L125 PetriNetUnfolderBase]: For 31075/31109 co-relation queries the response was YES. [2024-11-19 09:47:05,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21269 conditions, 5220 events. 2789/5220 cut-off events. For 31075/31109 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 33908 event pairs, 1152 based on Foata normal form. 38/5151 useless extension candidates. Maximal degree in co-relation 21210. Up to 1646 conditions per place. [2024-11-19 09:47:05,883 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 225 selfloop transitions, 48 changer transitions 0/289 dead transitions. [2024-11-19 09:47:05,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 289 transitions, 3366 flow [2024-11-19 09:47:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:47:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:47:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 417 transitions. [2024-11-19 09:47:05,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-11-19 09:47:05,886 INFO L175 Difference]: Start difference. First operand has 141 places, 172 transitions, 1925 flow. Second operand 10 states and 417 transitions. [2024-11-19 09:47:05,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 289 transitions, 3366 flow [2024-11-19 09:47:05,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 289 transitions, 3268 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-11-19 09:47:05,914 INFO L231 Difference]: Finished difference. Result has 149 places, 176 transitions, 2058 flow [2024-11-19 09:47:05,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2058, PETRI_PLACES=149, PETRI_TRANSITIONS=176} [2024-11-19 09:47:05,914 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 87 predicate places. [2024-11-19 09:47:05,914 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 176 transitions, 2058 flow [2024-11-19 09:47:05,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:05,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:05,915 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:05,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:47:06,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 09:47:06,115 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:06,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1458126025, now seen corresponding path program 2 times [2024-11-19 09:47:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105369500] [2024-11-19 09:47:06,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:06,139 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:06,139 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:47:06,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:06,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105369500] [2024-11-19 09:47:06,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105369500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:06,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598034749] [2024-11-19 09:47:06,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:06,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:06,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:06,283 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) [2024-11-19 09:47:06,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:47:06,350 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:06,351 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:06,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:47:06,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:47:06,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:06,598 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 35 treesize of output 31 [2024-11-19 09:47:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:47:06,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598034749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:06,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:06,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2024-11-19 09:47:06,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540570565] [2024-11-19 09:47:06,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:06,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:47:06,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:06,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:47:06,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:47:07,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-19 09:47:07,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 176 transitions, 2058 flow. Second operand has 20 states, 20 states have (on average 28.5) internal successors, (570), 20 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:07,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:07,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-19 09:47:07,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:08,040 INFO L124 PetriNetUnfolderBase]: 3773/6502 cut-off events. [2024-11-19 09:47:08,040 INFO L125 PetriNetUnfolderBase]: For 50334/50340 co-relation queries the response was YES. [2024-11-19 09:47:08,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27652 conditions, 6502 events. 3773/6502 cut-off events. For 50334/50340 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 39884 event pairs, 828 based on Foata normal form. 45/6513 useless extension candidates. Maximal degree in co-relation 22765. Up to 2149 conditions per place. [2024-11-19 09:47:08,077 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 251 selfloop transitions, 79 changer transitions 0/342 dead transitions. [2024-11-19 09:47:08,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 342 transitions, 4819 flow [2024-11-19 09:47:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:47:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:47:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 351 transitions. [2024-11-19 09:47:08,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-11-19 09:47:08,078 INFO L175 Difference]: Start difference. First operand has 149 places, 176 transitions, 2058 flow. Second operand 10 states and 351 transitions. [2024-11-19 09:47:08,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 342 transitions, 4819 flow [2024-11-19 09:47:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 342 transitions, 4713 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-11-19 09:47:08,116 INFO L231 Difference]: Finished difference. Result has 153 places, 190 transitions, 2389 flow [2024-11-19 09:47:08,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2389, PETRI_PLACES=153, PETRI_TRANSITIONS=190} [2024-11-19 09:47:08,117 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 91 predicate places. [2024-11-19 09:47:08,117 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 190 transitions, 2389 flow [2024-11-19 09:47:08,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 28.5) internal successors, (570), 20 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:08,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:08,117 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] [2024-11-19 09:47:08,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:47:08,321 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,SelfDestructingSolverStorable23 [2024-11-19 09:47:08,322 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:08,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2052384155, now seen corresponding path program 1 times [2024-11-19 09:47:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:08,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248127493] [2024-11-19 09:47:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:08,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248127493] [2024-11-19 09:47:08,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248127493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:08,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884571118] [2024-11-19 09:47:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:08,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:08,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:08,472 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) [2024-11-19 09:47:08,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:47:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:08,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:47:08,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:08,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884571118] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:09,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:09,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-19 09:47:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137338698] [2024-11-19 09:47:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:09,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:47:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:47:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:47:09,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:09,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 190 transitions, 2389 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:09,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:09,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:09,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:10,030 INFO L124 PetriNetUnfolderBase]: 3099/5754 cut-off events. [2024-11-19 09:47:10,030 INFO L125 PetriNetUnfolderBase]: For 49256/49382 co-relation queries the response was YES. [2024-11-19 09:47:10,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25090 conditions, 5754 events. 3099/5754 cut-off events. For 49256/49382 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 38442 event pairs, 949 based on Foata normal form. 32/5656 useless extension candidates. Maximal degree in co-relation 21026. Up to 2553 conditions per place. [2024-11-19 09:47:10,060 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 199 selfloop transitions, 70 changer transitions 12/307 dead transitions. [2024-11-19 09:47:10,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 307 transitions, 3968 flow [2024-11-19 09:47:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:47:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:47:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 572 transitions. [2024-11-19 09:47:10,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-19 09:47:10,062 INFO L175 Difference]: Start difference. First operand has 153 places, 190 transitions, 2389 flow. Second operand 14 states and 572 transitions. [2024-11-19 09:47:10,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 307 transitions, 3968 flow [2024-11-19 09:47:10,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 307 transitions, 3789 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-11-19 09:47:10,109 INFO L231 Difference]: Finished difference. Result has 167 places, 203 transitions, 2544 flow [2024-11-19 09:47:10,109 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2544, PETRI_PLACES=167, PETRI_TRANSITIONS=203} [2024-11-19 09:47:10,109 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 105 predicate places. [2024-11-19 09:47:10,109 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 203 transitions, 2544 flow [2024-11-19 09:47:10,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:10,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:10,110 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:10,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 09:47:10,310 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,SelfDestructingSolverStorable24 [2024-11-19 09:47:10,310 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:10,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:10,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2042732917, now seen corresponding path program 1 times [2024-11-19 09:47:10,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:10,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288397125] [2024-11-19 09:47:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:10,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:10,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:10,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288397125] [2024-11-19 09:47:10,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288397125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:10,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168758091] [2024-11-19 09:47:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:10,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:10,450 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) [2024-11-19 09:47:10,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:47:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:10,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:47:10,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:10,526 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 [2024-11-19 09:47:10,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:47:10,577 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 [2024-11-19 09:47:10,583 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:47:10,583 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 [2024-11-19 09:47:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:10,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:10,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:47:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168758091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:10,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:10,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-19 09:47:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517225677] [2024-11-19 09:47:10,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:10,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:47:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:47:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:47:11,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-19 09:47:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 203 transitions, 2544 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:11,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:11,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-19 09:47:11,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:12,684 INFO L124 PetriNetUnfolderBase]: 3659/6778 cut-off events. [2024-11-19 09:47:12,685 INFO L125 PetriNetUnfolderBase]: For 53933/53965 co-relation queries the response was YES. [2024-11-19 09:47:12,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29150 conditions, 6778 events. 3659/6778 cut-off events. For 53933/53965 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 44374 event pairs, 1445 based on Foata normal form. 47/6738 useless extension candidates. Maximal degree in co-relation 29065. Up to 2129 conditions per place. [2024-11-19 09:47:12,733 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 264 selfloop transitions, 52 changer transitions 0/338 dead transitions. [2024-11-19 09:47:12,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 338 transitions, 4566 flow [2024-11-19 09:47:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:47:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:47:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2024-11-19 09:47:12,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5629370629370629 [2024-11-19 09:47:12,734 INFO L175 Difference]: Start difference. First operand has 167 places, 203 transitions, 2544 flow. Second operand 13 states and 483 transitions. [2024-11-19 09:47:12,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 338 transitions, 4566 flow [2024-11-19 09:47:12,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 338 transitions, 4412 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-19 09:47:12,780 INFO L231 Difference]: Finished difference. Result has 177 places, 211 transitions, 2692 flow [2024-11-19 09:47:12,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2692, PETRI_PLACES=177, PETRI_TRANSITIONS=211} [2024-11-19 09:47:12,781 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 115 predicate places. [2024-11-19 09:47:12,781 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 211 transitions, 2692 flow [2024-11-19 09:47:12,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:12,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:12,781 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] [2024-11-19 09:47:12,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 09:47:12,981 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,SelfDestructingSolverStorable25 [2024-11-19 09:47:12,982 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:12,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2114371233, now seen corresponding path program 2 times [2024-11-19 09:47:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:12,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480048586] [2024-11-19 09:47:12,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:12,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:12,993 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:47:12,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:13,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480048586] [2024-11-19 09:47:13,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480048586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:13,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:13,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:47:13,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361807355] [2024-11-19 09:47:13,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:13,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:47:13,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:47:13,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:47:13,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:13,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 211 transitions, 2692 flow. Second operand has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:13,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:13,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:13,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:14,090 INFO L124 PetriNetUnfolderBase]: 5560/10308 cut-off events. [2024-11-19 09:47:14,090 INFO L125 PetriNetUnfolderBase]: For 90694/91009 co-relation queries the response was YES. [2024-11-19 09:47:14,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44601 conditions, 10308 events. 5560/10308 cut-off events. For 90694/91009 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 76637 event pairs, 567 based on Foata normal form. 44/10100 useless extension candidates. Maximal degree in co-relation 43637. Up to 2289 conditions per place. [2024-11-19 09:47:14,154 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 280 selfloop transitions, 134 changer transitions 34/476 dead transitions. [2024-11-19 09:47:14,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 476 transitions, 7174 flow [2024-11-19 09:47:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:47:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:47:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 427 transitions. [2024-11-19 09:47:14,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.646969696969697 [2024-11-19 09:47:14,155 INFO L175 Difference]: Start difference. First operand has 177 places, 211 transitions, 2692 flow. Second operand 10 states and 427 transitions. [2024-11-19 09:47:14,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 476 transitions, 7174 flow [2024-11-19 09:47:14,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 476 transitions, 7145 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:47:14,229 INFO L231 Difference]: Finished difference. Result has 185 places, 286 transitions, 4182 flow [2024-11-19 09:47:14,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4182, PETRI_PLACES=185, PETRI_TRANSITIONS=286} [2024-11-19 09:47:14,230 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 123 predicate places. [2024-11-19 09:47:14,230 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 286 transitions, 4182 flow [2024-11-19 09:47:14,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:14,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:14,230 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] [2024-11-19 09:47:14,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-19 09:47:14,231 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:14,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1287379601, now seen corresponding path program 3 times [2024-11-19 09:47:14,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:14,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703937791] [2024-11-19 09:47:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:47:14,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:14,246 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:47:14,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:14,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:14,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703937791] [2024-11-19 09:47:14,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703937791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:14,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:14,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:47:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020870814] [2024-11-19 09:47:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:14,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:47:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:47:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:47:14,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:14,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 286 transitions, 4182 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:14,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:14,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:14,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:15,645 INFO L124 PetriNetUnfolderBase]: 5410/10063 cut-off events. [2024-11-19 09:47:15,645 INFO L125 PetriNetUnfolderBase]: For 100367/100511 co-relation queries the response was YES. [2024-11-19 09:47:15,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46897 conditions, 10063 events. 5410/10063 cut-off events. For 100367/100511 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 74011 event pairs, 1806 based on Foata normal form. 36/9807 useless extension candidates. Maximal degree in co-relation 46789. Up to 5018 conditions per place. [2024-11-19 09:47:15,703 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 216 selfloop transitions, 86 changer transitions 25/355 dead transitions. [2024-11-19 09:47:15,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 355 transitions, 5555 flow [2024-11-19 09:47:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:47:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:47:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 378 transitions. [2024-11-19 09:47:15,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-19 09:47:15,704 INFO L175 Difference]: Start difference. First operand has 185 places, 286 transitions, 4182 flow. Second operand 9 states and 378 transitions. [2024-11-19 09:47:15,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 355 transitions, 5555 flow [2024-11-19 09:47:15,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 355 transitions, 5454 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-11-19 09:47:15,803 INFO L231 Difference]: Finished difference. Result has 191 places, 281 transitions, 4244 flow [2024-11-19 09:47:15,803 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4244, PETRI_PLACES=191, PETRI_TRANSITIONS=281} [2024-11-19 09:47:15,803 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 129 predicate places. [2024-11-19 09:47:15,803 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 281 transitions, 4244 flow [2024-11-19 09:47:15,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:15,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:15,804 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] [2024-11-19 09:47:15,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-19 09:47:15,804 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:15,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1255482953, now seen corresponding path program 4 times [2024-11-19 09:47:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:15,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858297008] [2024-11-19 09:47:15,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:47:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:15,818 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:47:15,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:15,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858297008] [2024-11-19 09:47:15,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858297008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318280295] [2024-11-19 09:47:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:47:15,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:15,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:15,964 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) [2024-11-19 09:47:15,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:47:16,026 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:47:16,026 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:16,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:47:16,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:16,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:16,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318280295] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:16,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:16,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 10] total 26 [2024-11-19 09:47:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504888115] [2024-11-19 09:47:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:16,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:47:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:47:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:47:16,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:47:16,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 281 transitions, 4244 flow. Second operand has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:16,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:16,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:47:16,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:18,465 INFO L124 PetriNetUnfolderBase]: 6785/12765 cut-off events. [2024-11-19 09:47:18,465 INFO L125 PetriNetUnfolderBase]: For 127869/128220 co-relation queries the response was YES. [2024-11-19 09:47:18,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60151 conditions, 12765 events. 6785/12765 cut-off events. For 127869/128220 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 99323 event pairs, 724 based on Foata normal form. 86/12631 useless extension candidates. Maximal degree in co-relation 56779. Up to 2335 conditions per place. [2024-11-19 09:47:18,572 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 315 selfloop transitions, 218 changer transitions 26/584 dead transitions. [2024-11-19 09:47:18,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 584 transitions, 9298 flow [2024-11-19 09:47:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:47:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:47:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 632 transitions. [2024-11-19 09:47:18,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6383838383838384 [2024-11-19 09:47:18,574 INFO L175 Difference]: Start difference. First operand has 191 places, 281 transitions, 4244 flow. Second operand 15 states and 632 transitions. [2024-11-19 09:47:18,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 584 transitions, 9298 flow [2024-11-19 09:47:18,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 584 transitions, 8849 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-19 09:47:18,810 INFO L231 Difference]: Finished difference. Result has 203 places, 362 transitions, 6060 flow [2024-11-19 09:47:18,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6060, PETRI_PLACES=203, PETRI_TRANSITIONS=362} [2024-11-19 09:47:18,811 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 141 predicate places. [2024-11-19 09:47:18,811 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 362 transitions, 6060 flow [2024-11-19 09:47:18,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:18,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:18,812 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] [2024-11-19 09:47:18,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 09:47:19,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:19,012 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:19,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1182717115, now seen corresponding path program 5 times [2024-11-19 09:47:19,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:19,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032418300] [2024-11-19 09:47:19,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:47:19,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:19,021 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:19,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:19,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032418300] [2024-11-19 09:47:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032418300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093390456] [2024-11-19 09:47:19,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:47:19,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:19,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:19,135 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) [2024-11-19 09:47:19,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:47:19,194 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:19,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:19,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:47:19,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:19,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:19,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093390456] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:19,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:19,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2024-11-19 09:47:19,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685688359] [2024-11-19 09:47:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:19,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:47:19,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:19,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:47:19,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:47:19,808 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:19,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 362 transitions, 6060 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:19,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:19,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:19,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:21,795 INFO L124 PetriNetUnfolderBase]: 6207/11771 cut-off events. [2024-11-19 09:47:21,795 INFO L125 PetriNetUnfolderBase]: For 143870/144267 co-relation queries the response was YES. [2024-11-19 09:47:21,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58861 conditions, 11771 events. 6207/11771 cut-off events. For 143870/144267 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 92812 event pairs, 1960 based on Foata normal form. 56/11523 useless extension candidates. Maximal degree in co-relation 58705. Up to 6563 conditions per place. [2024-11-19 09:47:21,876 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 192 selfloop transitions, 163 changer transitions 30/416 dead transitions. [2024-11-19 09:47:21,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 416 transitions, 7262 flow [2024-11-19 09:47:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:47:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:47:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 508 transitions. [2024-11-19 09:47:21,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5920745920745921 [2024-11-19 09:47:21,877 INFO L175 Difference]: Start difference. First operand has 203 places, 362 transitions, 6060 flow. Second operand 13 states and 508 transitions. [2024-11-19 09:47:21,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 416 transitions, 7262 flow [2024-11-19 09:47:22,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 416 transitions, 7025 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-11-19 09:47:22,119 INFO L231 Difference]: Finished difference. Result has 209 places, 350 transitions, 5931 flow [2024-11-19 09:47:22,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5831, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5931, PETRI_PLACES=209, PETRI_TRANSITIONS=350} [2024-11-19 09:47:22,120 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 147 predicate places. [2024-11-19 09:47:22,120 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 350 transitions, 5931 flow [2024-11-19 09:47:22,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:22,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:22,120 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] [2024-11-19 09:47:22,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 09:47:22,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:22,321 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:22,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:22,321 INFO L85 PathProgramCache]: Analyzing trace with hash -989815337, now seen corresponding path program 6 times [2024-11-19 09:47:22,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:22,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365214876] [2024-11-19 09:47:22,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:47:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:22,329 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-19 09:47:22,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:22,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:22,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365214876] [2024-11-19 09:47:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365214876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:22,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:22,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:47:22,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817654999] [2024-11-19 09:47:22,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:22,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:47:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:47:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:47:22,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:22,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 350 transitions, 5931 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:22,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:22,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:22,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:24,064 INFO L124 PetriNetUnfolderBase]: 6124/11602 cut-off events. [2024-11-19 09:47:24,065 INFO L125 PetriNetUnfolderBase]: For 141746/142125 co-relation queries the response was YES. [2024-11-19 09:47:24,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58248 conditions, 11602 events. 6124/11602 cut-off events. For 141746/142125 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 92189 event pairs, 1961 based on Foata normal form. 74/11380 useless extension candidates. Maximal degree in co-relation 58101. Up to 6576 conditions per place. [2024-11-19 09:47:24,148 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 185 selfloop transitions, 136 changer transitions 34/386 dead transitions. [2024-11-19 09:47:24,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 386 transitions, 6917 flow [2024-11-19 09:47:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:47:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:47:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 365 transitions. [2024-11-19 09:47:24,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-11-19 09:47:24,149 INFO L175 Difference]: Start difference. First operand has 209 places, 350 transitions, 5931 flow. Second operand 9 states and 365 transitions. [2024-11-19 09:47:24,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 386 transitions, 6917 flow [2024-11-19 09:47:24,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 386 transitions, 6547 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-11-19 09:47:24,441 INFO L231 Difference]: Finished difference. Result has 204 places, 331 transitions, 5682 flow [2024-11-19 09:47:24,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5682, PETRI_PLACES=204, PETRI_TRANSITIONS=331} [2024-11-19 09:47:24,441 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 142 predicate places. [2024-11-19 09:47:24,441 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 331 transitions, 5682 flow [2024-11-19 09:47:24,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:24,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:24,442 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] [2024-11-19 09:47:24,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-19 09:47:24,442 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:24,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash -929070188, now seen corresponding path program 1 times [2024-11-19 09:47:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386351796] [2024-11-19 09:47:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:24,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:24,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386351796] [2024-11-19 09:47:24,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386351796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:24,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509411361] [2024-11-19 09:47:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:24,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:24,584 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) [2024-11-19 09:47:24,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:47:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:24,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:47:24,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:25,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:25,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509411361] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:25,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:25,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-19 09:47:25,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387735894] [2024-11-19 09:47:25,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:25,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:47:25,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:25,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:47:25,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-11-19 09:47:25,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:25,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 331 transitions, 5682 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:25,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:25,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:25,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:27,488 INFO L124 PetriNetUnfolderBase]: 6102/11499 cut-off events. [2024-11-19 09:47:27,489 INFO L125 PetriNetUnfolderBase]: For 139335/139707 co-relation queries the response was YES. [2024-11-19 09:47:27,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59012 conditions, 11499 events. 6102/11499 cut-off events. For 139335/139707 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 90352 event pairs, 1879 based on Foata normal form. 64/11269 useless extension candidates. Maximal degree in co-relation 58850. Up to 6265 conditions per place. [2024-11-19 09:47:27,679 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 204 selfloop transitions, 162 changer transitions 12/409 dead transitions. [2024-11-19 09:47:27,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 409 transitions, 7051 flow [2024-11-19 09:47:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:47:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:47:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 527 transitions. [2024-11-19 09:47:27,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6142191142191142 [2024-11-19 09:47:27,681 INFO L175 Difference]: Start difference. First operand has 204 places, 331 transitions, 5682 flow. Second operand 13 states and 527 transitions. [2024-11-19 09:47:27,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 409 transitions, 7051 flow [2024-11-19 09:47:28,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 409 transitions, 6282 flow, removed 68 selfloop flow, removed 17 redundant places. [2024-11-19 09:47:28,015 INFO L231 Difference]: Finished difference. Result has 186 places, 331 transitions, 5279 flow [2024-11-19 09:47:28,015 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5279, PETRI_PLACES=186, PETRI_TRANSITIONS=331} [2024-11-19 09:47:28,015 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 124 predicate places. [2024-11-19 09:47:28,015 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 331 transitions, 5279 flow [2024-11-19 09:47:28,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:28,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:28,019 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] [2024-11-19 09:47:28,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 09:47:28,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:28,220 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:28,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash -151291238, now seen corresponding path program 2 times [2024-11-19 09:47:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:28,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818815468] [2024-11-19 09:47:28,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:28,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:28,228 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:47:28,228 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:28,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818815468] [2024-11-19 09:47:28,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818815468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:28,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:28,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-19 09:47:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781401487] [2024-11-19 09:47:28,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:28,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:47:28,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:28,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:47:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:47:28,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:47:28,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 331 transitions, 5279 flow. Second operand has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 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) [2024-11-19 09:47:28,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:28,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:47:28,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:30,364 INFO L124 PetriNetUnfolderBase]: 6769/12443 cut-off events. [2024-11-19 09:47:30,364 INFO L125 PetriNetUnfolderBase]: For 128733/129163 co-relation queries the response was YES. [2024-11-19 09:47:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60589 conditions, 12443 events. 6769/12443 cut-off events. For 128733/129163 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 95215 event pairs, 2150 based on Foata normal form. 74/12257 useless extension candidates. Maximal degree in co-relation 60446. Up to 6781 conditions per place. [2024-11-19 09:47:30,445 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 211 selfloop transitions, 147 changer transitions 34/420 dead transitions. [2024-11-19 09:47:30,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 420 transitions, 6705 flow [2024-11-19 09:47:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 09:47:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 09:47:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 619 transitions. [2024-11-19 09:47:30,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5861742424242424 [2024-11-19 09:47:30,446 INFO L175 Difference]: Start difference. First operand has 186 places, 331 transitions, 5279 flow. Second operand 16 states and 619 transitions. [2024-11-19 09:47:30,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 420 transitions, 6705 flow [2024-11-19 09:47:30,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 420 transitions, 6458 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-19 09:47:30,702 INFO L231 Difference]: Finished difference. Result has 197 places, 330 transitions, 5348 flow [2024-11-19 09:47:30,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5348, PETRI_PLACES=197, PETRI_TRANSITIONS=330} [2024-11-19 09:47:30,702 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 135 predicate places. [2024-11-19 09:47:30,702 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 330 transitions, 5348 flow [2024-11-19 09:47:30,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 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) [2024-11-19 09:47:30,703 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:30,703 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] [2024-11-19 09:47:30,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-19 09:47:30,703 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:30,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1405384046, now seen corresponding path program 3 times [2024-11-19 09:47:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:30,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774420179] [2024-11-19 09:47:30,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:47:30,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:30,710 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:47:30,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:30,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:30,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774420179] [2024-11-19 09:47:30,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774420179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:30,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:30,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:47:30,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714886570] [2024-11-19 09:47:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:30,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:47:30,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:47:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:47:30,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:30,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 330 transitions, 5348 flow. Second operand has 6 states, 6 states have (on average 35.666666666666664) internal successors, (214), 6 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:30,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:30,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:30,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:32,192 INFO L124 PetriNetUnfolderBase]: 6201/11860 cut-off events. [2024-11-19 09:47:32,193 INFO L125 PetriNetUnfolderBase]: For 115946/116287 co-relation queries the response was YES. [2024-11-19 09:47:32,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58760 conditions, 11860 events. 6201/11860 cut-off events. For 115946/116287 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 94947 event pairs, 874 based on Foata normal form. 94/11660 useless extension candidates. Maximal degree in co-relation 58624. Up to 3011 conditions per place. [2024-11-19 09:47:32,283 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 208 selfloop transitions, 179 changer transitions 26/444 dead transitions. [2024-11-19 09:47:32,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 444 transitions, 7484 flow [2024-11-19 09:47:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:47:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:47:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 347 transitions. [2024-11-19 09:47:32,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6571969696969697 [2024-11-19 09:47:32,284 INFO L175 Difference]: Start difference. First operand has 197 places, 330 transitions, 5348 flow. Second operand 8 states and 347 transitions. [2024-11-19 09:47:32,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 444 transitions, 7484 flow [2024-11-19 09:47:32,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 444 transitions, 7298 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-11-19 09:47:32,649 INFO L231 Difference]: Finished difference. Result has 190 places, 324 transitions, 5522 flow [2024-11-19 09:47:32,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5168, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5522, PETRI_PLACES=190, PETRI_TRANSITIONS=324} [2024-11-19 09:47:32,650 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 128 predicate places. [2024-11-19 09:47:32,650 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 324 transitions, 5522 flow [2024-11-19 09:47:32,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.666666666666664) internal successors, (214), 6 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:32,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:32,650 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] [2024-11-19 09:47:32,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-19 09:47:32,650 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:32,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1755724260, now seen corresponding path program 4 times [2024-11-19 09:47:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:32,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746612476] [2024-11-19 09:47:32,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:47:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:32,659 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:47:32,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:32,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:32,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746612476] [2024-11-19 09:47:32,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746612476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:32,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892063956] [2024-11-19 09:47:32,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:47:32,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:32,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:32,892 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) [2024-11-19 09:47:32,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 09:47:32,955 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:47:32,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:32,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:47:32,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:33,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892063956] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:33,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:33,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-19 09:47:33,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720794155] [2024-11-19 09:47:33,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:33,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:47:33,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:33,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:47:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:47:33,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:33,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 324 transitions, 5522 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:33,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:33,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:33,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:35,434 INFO L124 PetriNetUnfolderBase]: 6101/11641 cut-off events. [2024-11-19 09:47:35,434 INFO L125 PetriNetUnfolderBase]: For 125699/126011 co-relation queries the response was YES. [2024-11-19 09:47:35,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60072 conditions, 11641 events. 6101/11641 cut-off events. For 125699/126011 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 93010 event pairs, 1941 based on Foata normal form. 38/11359 useless extension candidates. Maximal degree in co-relation 59952. Up to 6552 conditions per place. [2024-11-19 09:47:35,520 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 168 selfloop transitions, 151 changer transitions 26/376 dead transitions. [2024-11-19 09:47:35,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 376 transitions, 6583 flow [2024-11-19 09:47:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:47:35,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:47:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 472 transitions. [2024-11-19 09:47:35,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-11-19 09:47:35,521 INFO L175 Difference]: Start difference. First operand has 190 places, 324 transitions, 5522 flow. Second operand 12 states and 472 transitions. [2024-11-19 09:47:35,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 376 transitions, 6583 flow [2024-11-19 09:47:35,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 376 transitions, 6372 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-11-19 09:47:35,954 INFO L231 Difference]: Finished difference. Result has 193 places, 318 transitions, 5528 flow [2024-11-19 09:47:35,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5528, PETRI_PLACES=193, PETRI_TRANSITIONS=318} [2024-11-19 09:47:35,954 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 131 predicate places. [2024-11-19 09:47:35,954 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 318 transitions, 5528 flow [2024-11-19 09:47:35,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:35,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:35,954 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] [2024-11-19 09:47:35,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:36,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:36,155 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:36,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:36,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1629932912, now seen corresponding path program 5 times [2024-11-19 09:47:36,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:36,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550536576] [2024-11-19 09:47:36,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:47:36,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:36,166 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:36,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:36,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550536576] [2024-11-19 09:47:36,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550536576] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496249851] [2024-11-19 09:47:36,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:47:36,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:36,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:36,294 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) [2024-11-19 09:47:36,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 09:47:36,351 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:36,351 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:36,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:47:36,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:36,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496249851] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:36,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-19 09:47:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860927018] [2024-11-19 09:47:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:36,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:47:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:47:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:47:36,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:47:36,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 318 transitions, 5528 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:36,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:36,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:47:36,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:38,301 INFO L124 PetriNetUnfolderBase]: 6012/11466 cut-off events. [2024-11-19 09:47:38,301 INFO L125 PetriNetUnfolderBase]: For 120950/121267 co-relation queries the response was YES. [2024-11-19 09:47:38,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59791 conditions, 11466 events. 6012/11466 cut-off events. For 120950/121267 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 91533 event pairs, 1940 based on Foata normal form. 38/11186 useless extension candidates. Maximal degree in co-relation 59664. Up to 6552 conditions per place. [2024-11-19 09:47:38,401 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 147 selfloop transitions, 145 changer transitions 28/351 dead transitions. [2024-11-19 09:47:38,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 351 transitions, 6377 flow [2024-11-19 09:47:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:47:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:47:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 392 transitions. [2024-11-19 09:47:38,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-11-19 09:47:38,403 INFO L175 Difference]: Start difference. First operand has 193 places, 318 transitions, 5528 flow. Second operand 10 states and 392 transitions. [2024-11-19 09:47:38,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 351 transitions, 6377 flow [2024-11-19 09:47:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 351 transitions, 6340 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 09:47:38,791 INFO L231 Difference]: Finished difference. Result has 192 places, 306 transitions, 5590 flow [2024-11-19 09:47:38,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5590, PETRI_PLACES=192, PETRI_TRANSITIONS=306} [2024-11-19 09:47:38,791 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 130 predicate places. [2024-11-19 09:47:38,792 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 306 transitions, 5590 flow [2024-11-19 09:47:38,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:38,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:38,792 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] [2024-11-19 09:47:38,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:38,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:38,993 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:38,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:38,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1917292861, now seen corresponding path program 1 times [2024-11-19 09:47:38,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:38,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978110738] [2024-11-19 09:47:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:39,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:39,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978110738] [2024-11-19 09:47:39,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978110738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:39,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716028496] [2024-11-19 09:47:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:39,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:39,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:39,124 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) [2024-11-19 09:47:39,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 09:47:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:39,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:47:39,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:39,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:39,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716028496] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:39,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:39,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-19 09:47:39,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880819659] [2024-11-19 09:47:39,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:39,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:47:39,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:39,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:47:39,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:47:39,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:47:39,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 306 transitions, 5590 flow. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:39,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:39,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:47:39,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:40,825 INFO L124 PetriNetUnfolderBase]: 5667/11401 cut-off events. [2024-11-19 09:47:40,825 INFO L125 PetriNetUnfolderBase]: For 107095/107273 co-relation queries the response was YES. [2024-11-19 09:47:40,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56814 conditions, 11401 events. 5667/11401 cut-off events. For 107095/107273 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 93352 event pairs, 2001 based on Foata normal form. 504/11818 useless extension candidates. Maximal degree in co-relation 56688. Up to 5007 conditions per place. [2024-11-19 09:47:40,912 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 270 selfloop transitions, 27 changer transitions 2/327 dead transitions. [2024-11-19 09:47:40,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 327 transitions, 6104 flow [2024-11-19 09:47:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:47:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:47:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-11-19 09:47:40,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5692640692640693 [2024-11-19 09:47:40,913 INFO L175 Difference]: Start difference. First operand has 192 places, 306 transitions, 5590 flow. Second operand 7 states and 263 transitions. [2024-11-19 09:47:40,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 327 transitions, 6104 flow [2024-11-19 09:47:41,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 327 transitions, 5668 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-11-19 09:47:41,268 INFO L231 Difference]: Finished difference. Result has 175 places, 256 transitions, 3871 flow [2024-11-19 09:47:41,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3871, PETRI_PLACES=175, PETRI_TRANSITIONS=256} [2024-11-19 09:47:41,269 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 113 predicate places. [2024-11-19 09:47:41,269 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 256 transitions, 3871 flow [2024-11-19 09:47:41,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:41,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:41,269 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:41,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:41,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:41,470 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:41,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1128841087, now seen corresponding path program 2 times [2024-11-19 09:47:41,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:41,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280102179] [2024-11-19 09:47:41,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:41,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:41,479 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:47:41,479 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:47:41,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280102179] [2024-11-19 09:47:41,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280102179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066498040] [2024-11-19 09:47:41,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:41,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:41,584 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) [2024-11-19 09:47:41,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 09:47:41,652 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:47:41,652 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:41,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:47:41,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:41,675 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 [2024-11-19 09:47:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:47:41,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:47:42,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066498040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:42,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:42,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:47:42,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720121756] [2024-11-19 09:47:42,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:42,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:47:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:47:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:47:42,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-19 09:47:42,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 256 transitions, 3871 flow. Second operand has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:42,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:42,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-19 09:47:42,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:44,409 INFO L124 PetriNetUnfolderBase]: 6799/12328 cut-off events. [2024-11-19 09:47:44,409 INFO L125 PetriNetUnfolderBase]: For 93944/94124 co-relation queries the response was YES. [2024-11-19 09:47:44,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64979 conditions, 12328 events. 6799/12328 cut-off events. For 93944/94124 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 93848 event pairs, 2533 based on Foata normal form. 84/12074 useless extension candidates. Maximal degree in co-relation 63269. Up to 6364 conditions per place. [2024-11-19 09:47:44,486 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 286 selfloop transitions, 33 changer transitions 0/332 dead transitions. [2024-11-19 09:47:44,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 332 transitions, 5653 flow [2024-11-19 09:47:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:47:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:47:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 240 transitions. [2024-11-19 09:47:44,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-11-19 09:47:44,487 INFO L175 Difference]: Start difference. First operand has 175 places, 256 transitions, 3871 flow. Second operand 7 states and 240 transitions. [2024-11-19 09:47:44,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 332 transitions, 5653 flow [2024-11-19 09:47:44,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 332 transitions, 5458 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 09:47:44,700 INFO L231 Difference]: Finished difference. Result has 172 places, 255 transitions, 3800 flow [2024-11-19 09:47:44,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3800, PETRI_PLACES=172, PETRI_TRANSITIONS=255} [2024-11-19 09:47:44,700 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 110 predicate places. [2024-11-19 09:47:44,700 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 255 transitions, 3800 flow [2024-11-19 09:47:44,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:44,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:44,701 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:44,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:44,901 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,SelfDestructingSolverStorable37 [2024-11-19 09:47:44,901 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:47:44,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1821426884, now seen corresponding path program 2 times [2024-11-19 09:47:44,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:44,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056035321] [2024-11-19 09:47:44,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:44,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:44,914 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:47:44,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:47:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056035321] [2024-11-19 09:47:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056035321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391568104] [2024-11-19 09:47:45,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:45,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:45,027 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) [2024-11-19 09:47:45,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 09:47:45,085 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:47:45,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:45,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 09:47:45,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:45,095 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 [2024-11-19 09:47:45,097 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 [2024-11-19 09:47:45,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:47:45,147 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 [2024-11-19 09:47:45,153 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:47:45,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:47:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:47:45,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:47:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391568104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:45,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:45,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:47:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484728597] [2024-11-19 09:47:45,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:45,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:47:45,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:47:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:47:46,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-19 09:47:46,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 255 transitions, 3800 flow. Second operand has 17 states, 17 states have (on average 27.352941176470587) internal successors, (465), 17 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:46,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:46,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-19 09:47:46,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand