./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:49:03,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:49:03,257 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:49:03,261 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:49:03,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:49:03,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:49:03,296 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:49:03,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:49:03,297 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:49:03,297 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:49:03,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:49:03,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:49:03,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:49:03,300 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:49:03,301 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:49:03,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:49:03,301 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:49:03,301 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:49:03,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:49:03,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:49:03,302 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:49:03,305 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:49:03,305 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:49:03,305 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:49:03,306 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:49:03,306 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:49:03,306 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:49:03,306 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:49:03,306 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:49:03,307 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:49:03,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:49:03,307 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:49:03,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:49:03,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:49:03,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:49:03,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:49:03,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:49:03,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:49:03,308 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:49:03,308 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:49:03,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:49:03,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:49:03,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-11-22 21:49:03,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:49:03,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:49:03,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:49:03,555 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:49:03,555 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:49:03,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-22 21:49:04,926 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:49:05,093 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:49:05,094 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-22 21:49:05,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80ae3dc4/a3a99e24500e4a1d82fa8f41e3462d13/FLAG2e56df622 [2024-11-22 21:49:05,112 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80ae3dc4/a3a99e24500e4a1d82fa8f41e3462d13 [2024-11-22 21:49:05,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:49:05,115 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:49:05,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:49:05,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:49:05,121 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:49:05,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187b4cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05, skipping insertion in model container [2024-11-22 21:49:05,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,146 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:49:05,321 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:49:05,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:49:05,333 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:49:05,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:49:05,372 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:49:05,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05 WrapperNode [2024-11-22 21:49:05,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:49:05,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:49:05,377 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:49:05,377 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:49:05,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,482 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 189 [2024-11-22 21:49:05,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:49:05,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:49:05,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:49:05,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:49:05,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,503 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,522 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 21:49:05,522 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,522 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:49:05,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:49:05,537 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:49:05,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:49:05,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (1/1) ... [2024-11-22 21:49:05,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:49:05,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:05,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:49:05,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:49:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:49:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:49:05,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:49:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:49:05,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:49:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:49:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:49:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:49:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:49:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:49:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:49:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:49:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:49:05,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:49:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:49:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:49:05,611 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:49:05,686 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:49:05,688 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:49:06,008 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:49:06,008 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:49:06,188 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:49:06,188 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:49:06,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:49:06 BoogieIcfgContainer [2024-11-22 21:49:06,189 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:49:06,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:49:06,190 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:49:06,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:49:06,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:49:05" (1/3) ... [2024-11-22 21:49:06,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2507bb35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:49:06, skipping insertion in model container [2024-11-22 21:49:06,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:05" (2/3) ... [2024-11-22 21:49:06,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2507bb35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:49:06, skipping insertion in model container [2024-11-22 21:49:06,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:49:06" (3/3) ... [2024-11-22 21:49:06,205 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-11-22 21:49:06,226 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:49:06,227 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-22 21:49:06,227 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:49:06,284 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:49:06,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2024-11-22 21:49:06,355 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2024-11-22 21:49:06,355 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:49:06,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 5/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 137 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-22 21:49:06,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2024-11-22 21:49:06,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2024-11-22 21:49:06,379 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:49:06,388 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;@102e6019, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:49:06,389 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-22 21:49:06,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:49:06,393 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:49:06,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:49:06,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:06,394 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:49:06,395 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:06,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 576019, now seen corresponding path program 1 times [2024-11-22 21:49:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:06,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701980508] [2024-11-22 21:49:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:06,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:06,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701980508] [2024-11-22 21:49:06,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701980508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:06,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:06,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:49:06,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126663257] [2024-11-22 21:49:06,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:06,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:49:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:49:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:49:06,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-22 21:49:06,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:06,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:06,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-22 21:49:06,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:06,938 INFO L124 PetriNetUnfolderBase]: 299/576 cut-off events. [2024-11-22 21:49:06,938 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-22 21:49:06,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 576 events. 299/576 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3105 event pairs, 171 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 985. Up to 443 conditions per place. [2024-11-22 21:49:06,947 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-22 21:49:06,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 164 flow [2024-11-22 21:49:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:49:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:49:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-22 21:49:06,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-22 21:49:06,960 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 90 transitions. [2024-11-22 21:49:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 164 flow [2024-11-22 21:49:06,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:49:06,966 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2024-11-22 21:49:06,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-22 21:49:06,972 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-22 21:49:06,972 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2024-11-22 21:49:06,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:06,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:06,973 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:49:06,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:49:06,973 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:06,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 576020, now seen corresponding path program 1 times [2024-11-22 21:49:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962692661] [2024-11-22 21:49:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:06,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:07,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:07,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962692661] [2024-11-22 21:49:07,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962692661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:07,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:07,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:49:07,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083769519] [2024-11-22 21:49:07,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:07,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:07,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:07,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:49:07,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-22 21:49:07,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:07,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:07,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-22 21:49:07,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:07,548 INFO L124 PetriNetUnfolderBase]: 300/579 cut-off events. [2024-11-22 21:49:07,548 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:49:07,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 579 events. 300/579 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3110 event pairs, 171 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1019. Up to 452 conditions per place. [2024-11-22 21:49:07,556 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 31 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-11-22 21:49:07,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 176 flow [2024-11-22 21:49:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-22 21:49:07,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-22 21:49:07,558 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 112 transitions. [2024-11-22 21:49:07,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 176 flow [2024-11-22 21:49:07,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:07,562 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 123 flow [2024-11-22 21:49:07,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-22 21:49:07,564 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-11-22 21:49:07,564 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 123 flow [2024-11-22 21:49:07,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:07,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:07,564 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:49:07,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:49:07,565 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:07,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:07,566 INFO L85 PathProgramCache]: Analyzing trace with hash 17857530, now seen corresponding path program 1 times [2024-11-22 21:49:07,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:07,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316556673] [2024-11-22 21:49:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:07,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:07,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:07,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316556673] [2024-11-22 21:49:07,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316556673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:07,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:07,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:49:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684645836] [2024-11-22 21:49:07,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:07,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:49:07,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-11-22 21:49:07,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:07,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:07,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-11-22 21:49:07,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:07,790 INFO L124 PetriNetUnfolderBase]: 290/531 cut-off events. [2024-11-22 21:49:07,790 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:49:07,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 531 events. 290/531 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2620 event pairs, 171 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 976. Up to 433 conditions per place. [2024-11-22 21:49:07,793 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-22 21:49:07,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 181 flow [2024-11-22 21:49:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-22 21:49:07,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-11-22 21:49:07,795 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 123 flow. Second operand 4 states and 94 transitions. [2024-11-22 21:49:07,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 181 flow [2024-11-22 21:49:07,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:49:07,797 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 116 flow [2024-11-22 21:49:07,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-22 21:49:07,798 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-22 21:49:07,798 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 116 flow [2024-11-22 21:49:07,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:07,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:07,798 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:49:07,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:49:07,799 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:07,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 17857531, now seen corresponding path program 1 times [2024-11-22 21:49:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:07,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837153303] [2024-11-22 21:49:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:07,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:07,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837153303] [2024-11-22 21:49:07,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837153303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:07,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:07,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:49:07,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578338355] [2024-11-22 21:49:07,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:07,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:49:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:49:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:49:07,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-22 21:49:07,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:07,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:07,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-22 21:49:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:07,961 INFO L124 PetriNetUnfolderBase]: 274/513 cut-off events. [2024-11-22 21:49:07,961 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:49:07,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952 conditions, 513 events. 274/513 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2539 event pairs, 153 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 929. Up to 411 conditions per place. [2024-11-22 21:49:07,964 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-11-22 21:49:07,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 188 flow [2024-11-22 21:49:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:49:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:49:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-22 21:49:07,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-11-22 21:49:07,968 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 116 flow. Second operand 3 states and 95 transitions. [2024-11-22 21:49:07,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 188 flow [2024-11-22 21:49:07,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:07,969 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 128 flow [2024-11-22 21:49:07,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-22 21:49:07,970 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-22 21:49:07,971 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 128 flow [2024-11-22 21:49:07,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:07,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:07,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:49:07,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:49:07,972 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:07,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash 17857523, now seen corresponding path program 1 times [2024-11-22 21:49:07,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:07,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396031670] [2024-11-22 21:49:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:07,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:08,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:08,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396031670] [2024-11-22 21:49:08,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396031670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:08,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:08,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:49:08,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307915495] [2024-11-22 21:49:08,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:08,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:49:08,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:08,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:49:08,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:49:08,231 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-22 21:49:08,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:08,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:08,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-22 21:49:08,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:08,359 INFO L124 PetriNetUnfolderBase]: 274/512 cut-off events. [2024-11-22 21:49:08,360 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-22 21:49:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 512 events. 274/512 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2545 event pairs, 153 based on Foata normal form. 1/335 useless extension candidates. Maximal degree in co-relation 933. Up to 410 conditions per place. [2024-11-22 21:49:08,363 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 30 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-11-22 21:49:08,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 202 flow [2024-11-22 21:49:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:49:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:49:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-22 21:49:08,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-11-22 21:49:08,367 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 128 flow. Second operand 5 states and 132 transitions. [2024-11-22 21:49:08,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 202 flow [2024-11-22 21:49:08,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:49:08,368 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 151 flow [2024-11-22 21:49:08,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-22 21:49:08,370 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-22 21:49:08,370 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 151 flow [2024-11-22 21:49:08,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:08,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:08,372 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:49:08,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:49:08,372 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:08,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash 553573860, now seen corresponding path program 1 times [2024-11-22 21:49:08,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:08,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442346887] [2024-11-22 21:49:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:08,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:08,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442346887] [2024-11-22 21:49:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442346887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258667146] [2024-11-22 21:49:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:08,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:08,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:08,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:49:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:08,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:49:08,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:08,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:49:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:08,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258667146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:08,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:08,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:49:08,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423401494] [2024-11-22 21:49:08,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:08,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:49:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:49:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:49:09,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-22 21:49:09,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 151 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:09,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:09,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-22 21:49:09,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:09,280 INFO L124 PetriNetUnfolderBase]: 274/511 cut-off events. [2024-11-22 21:49:09,281 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:49:09,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 511 events. 274/511 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2541 event pairs, 153 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 939. Up to 409 conditions per place. [2024-11-22 21:49:09,283 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 27 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-11-22 21:49:09,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 217 flow [2024-11-22 21:49:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:49:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:49:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-11-22 21:49:09,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-11-22 21:49:09,285 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 151 flow. Second operand 7 states and 167 transitions. [2024-11-22 21:49:09,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 217 flow [2024-11-22 21:49:09,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:49:09,286 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 162 flow [2024-11-22 21:49:09,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-11-22 21:49:09,287 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2024-11-22 21:49:09,287 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 162 flow [2024-11-22 21:49:09,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:09,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:09,288 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-22 21:49:09,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:49:09,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 21:49:09,494 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:09,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash -18771101, now seen corresponding path program 1 times [2024-11-22 21:49:09,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:09,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655180910] [2024-11-22 21:49:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:09,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:09,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:09,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655180910] [2024-11-22 21:49:09,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655180910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:09,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8488604] [2024-11-22 21:49:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:09,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:09,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:09,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:49:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:09,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:49:09,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:09,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:49:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:09,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:10,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8488604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:10,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:10,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:49:10,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950608808] [2024-11-22 21:49:10,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:10,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:49:10,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:49:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:49:10,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-22 21:49:10,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:10,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:10,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-22 21:49:10,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:10,585 INFO L124 PetriNetUnfolderBase]: 276/516 cut-off events. [2024-11-22 21:49:10,585 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-22 21:49:10,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 516 events. 276/516 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2551 event pairs, 153 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 948. Up to 403 conditions per place. [2024-11-22 21:49:10,588 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 23 selfloop transitions, 17 changer transitions 0/51 dead transitions. [2024-11-22 21:49:10,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 272 flow [2024-11-22 21:49:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:49:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:49:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-11-22 21:49:10,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-11-22 21:49:10,589 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 162 flow. Second operand 9 states and 213 transitions. [2024-11-22 21:49:10,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 272 flow [2024-11-22 21:49:10,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 222 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-22 21:49:10,591 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 176 flow [2024-11-22 21:49:10,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-22 21:49:10,593 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-11-22 21:49:10,593 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 176 flow [2024-11-22 21:49:10,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:10,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:10,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:49:10,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:10,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-22 21:49:10,799 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:10,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash -18771093, now seen corresponding path program 1 times [2024-11-22 21:49:10,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:10,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394733847] [2024-11-22 21:49:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:10,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:10,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:10,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394733847] [2024-11-22 21:49:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394733847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:10,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625692429] [2024-11-22 21:49:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:10,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:10,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:10,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:10,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:49:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:10,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:49:10,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:10,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:10,984 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 [2024-11-22 21:49:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:10,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625692429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:10,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:10,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-22 21:49:10,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736363187] [2024-11-22 21:49:10,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:10,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:49:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:49:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:49:11,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-22 21:49:11,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:11,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:11,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-22 21:49:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:11,224 INFO L124 PetriNetUnfolderBase]: 276/515 cut-off events. [2024-11-22 21:49:11,224 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:49:11,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 515 events. 276/515 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2535 event pairs, 153 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 917. Up to 403 conditions per place. [2024-11-22 21:49:11,226 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-22 21:49:11,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 254 flow [2024-11-22 21:49:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:49:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:49:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-11-22 21:49:11,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-22 21:49:11,228 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 176 flow. Second operand 5 states and 135 transitions. [2024-11-22 21:49:11,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 254 flow [2024-11-22 21:49:11,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 223 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-22 21:49:11,231 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 157 flow [2024-11-22 21:49:11,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-22 21:49:11,231 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-11-22 21:49:11,231 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 157 flow [2024-11-22 21:49:11,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:11,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:11,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:11,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:49:11,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:11,434 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:11,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash -991081515, now seen corresponding path program 1 times [2024-11-22 21:49:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:11,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786261159] [2024-11-22 21:49:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:11,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:11,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:11,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786261159] [2024-11-22 21:49:11,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786261159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:11,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160383030] [2024-11-22 21:49:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:11,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:11,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:11,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:11,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:49:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:11,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 21:49:11,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:11,658 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:49:11,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160383030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:11,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:49:11,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-22 21:49:11,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875625666] [2024-11-22 21:49:11,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:11,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:11,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:11,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:49:11,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-22 21:49:11,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:11,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:11,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-22 21:49:11,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:11,802 INFO L124 PetriNetUnfolderBase]: 537/888 cut-off events. [2024-11-22 21:49:11,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:49:11,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 888 events. 537/888 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4659 event pairs, 136 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1702. Up to 486 conditions per place. [2024-11-22 21:49:11,805 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 60 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-22 21:49:11,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 326 flow [2024-11-22 21:49:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-22 21:49:11,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2024-11-22 21:49:11,806 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 157 flow. Second operand 4 states and 123 transitions. [2024-11-22 21:49:11,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 326 flow [2024-11-22 21:49:11,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:11,808 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 163 flow [2024-11-22 21:49:11,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-22 21:49:11,809 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-22 21:49:11,809 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 163 flow [2024-11-22 21:49:11,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:11,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:11,809 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:11,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:49:12,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:12,010 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:12,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1053420534, now seen corresponding path program 1 times [2024-11-22 21:49:12,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:12,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220240325] [2024-11-22 21:49:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:12,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:12,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:12,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220240325] [2024-11-22 21:49:12,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220240325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:12,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:12,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:49:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981363425] [2024-11-22 21:49:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:12,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:12,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:49:12,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-22 21:49:12,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 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) [2024-11-22 21:49:12,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:12,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-22 21:49:12,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:12,163 INFO L124 PetriNetUnfolderBase]: 482/938 cut-off events. [2024-11-22 21:49:12,163 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-22 21:49:12,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1892 conditions, 938 events. 482/938 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5477 event pairs, 312 based on Foata normal form. 27/707 useless extension candidates. Maximal degree in co-relation 1514. Up to 664 conditions per place. [2024-11-22 21:49:12,168 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 3 changer transitions 1/73 dead transitions. [2024-11-22 21:49:12,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 366 flow [2024-11-22 21:49:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-22 21:49:12,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6556603773584906 [2024-11-22 21:49:12,169 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 163 flow. Second operand 4 states and 139 transitions. [2024-11-22 21:49:12,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 366 flow [2024-11-22 21:49:12,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:12,170 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 180 flow [2024-11-22 21:49:12,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-22 21:49:12,171 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-22 21:49:12,171 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 180 flow [2024-11-22 21:49:12,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 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) [2024-11-22 21:49:12,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:12,172 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:12,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:49:12,172 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:12,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142427, now seen corresponding path program 1 times [2024-11-22 21:49:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:12,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108715179] [2024-11-22 21:49:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:49:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108715179] [2024-11-22 21:49:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108715179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:12,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:12,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:49:12,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133062281] [2024-11-22 21:49:12,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:12,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:49:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:12,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:49:12,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:49:12,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-11-22 21:49:12,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:12,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:12,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-11-22 21:49:12,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:12,480 INFO L124 PetriNetUnfolderBase]: 417/823 cut-off events. [2024-11-22 21:49:12,480 INFO L125 PetriNetUnfolderBase]: For 79/103 co-relation queries the response was YES. [2024-11-22 21:49:12,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 823 events. 417/823 cut-off events. For 79/103 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4575 event pairs, 279 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1483. Up to 676 conditions per place. [2024-11-22 21:49:12,484 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-11-22 21:49:12,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 252 flow [2024-11-22 21:49:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:49:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:49:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-22 21:49:12,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-11-22 21:49:12,486 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 180 flow. Second operand 5 states and 120 transitions. [2024-11-22 21:49:12,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 252 flow [2024-11-22 21:49:12,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:12,488 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 179 flow [2024-11-22 21:49:12,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-22 21:49:12,490 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-22 21:49:12,490 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 179 flow [2024-11-22 21:49:12,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:12,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:12,491 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:12,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:49:12,491 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:12,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142426, now seen corresponding path program 1 times [2024-11-22 21:49:12,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:12,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887145242] [2024-11-22 21:49:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:12,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:12,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:12,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887145242] [2024-11-22 21:49:12,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887145242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:49:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242219397] [2024-11-22 21:49:12,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:12,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:49:12,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:49:12,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:49:12,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-22 21:49:12,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:12,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:12,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-22 21:49:12,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:12,752 INFO L124 PetriNetUnfolderBase]: 260/580 cut-off events. [2024-11-22 21:49:12,753 INFO L125 PetriNetUnfolderBase]: For 82/94 co-relation queries the response was YES. [2024-11-22 21:49:12,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 580 events. 260/580 cut-off events. For 82/94 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3191 event pairs, 174 based on Foata normal form. 0/516 useless extension candidates. Maximal degree in co-relation 866. Up to 449 conditions per place. [2024-11-22 21:49:12,756 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-22 21:49:12,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 245 flow [2024-11-22 21:49:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-22 21:49:12,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-11-22 21:49:12,757 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 179 flow. Second operand 4 states and 103 transitions. [2024-11-22 21:49:12,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 245 flow [2024-11-22 21:49:12,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:12,758 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 169 flow [2024-11-22 21:49:12,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-22 21:49:12,761 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-22 21:49:12,761 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 169 flow [2024-11-22 21:49:12,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:12,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:12,761 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:12,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 21:49:12,762 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:12,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1275096547, now seen corresponding path program 1 times [2024-11-22 21:49:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145906473] [2024-11-22 21:49:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:12,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:12,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145906473] [2024-11-22 21:49:12,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145906473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:12,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272842183] [2024-11-22 21:49:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:12,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:12,868 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:49:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:12,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:49:12,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:13,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:13,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272842183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:13,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:13,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-22 21:49:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209680980] [2024-11-22 21:49:13,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:13,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:49:13,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:13,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:49:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:49:13,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-22 21:49:13,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 169 flow. Second operand has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:13,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:13,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-22 21:49:13,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:13,460 INFO L124 PetriNetUnfolderBase]: 444/924 cut-off events. [2024-11-22 21:49:13,460 INFO L125 PetriNetUnfolderBase]: For 116/132 co-relation queries the response was YES. [2024-11-22 21:49:13,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 924 events. 444/924 cut-off events. For 116/132 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5395 event pairs, 140 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 1417. Up to 218 conditions per place. [2024-11-22 21:49:13,465 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-11-22 21:49:13,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 481 flow [2024-11-22 21:49:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:49:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:49:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-11-22 21:49:13,466 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231560891938251 [2024-11-22 21:49:13,466 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 169 flow. Second operand 11 states and 305 transitions. [2024-11-22 21:49:13,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 481 flow [2024-11-22 21:49:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:13,468 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 219 flow [2024-11-22 21:49:13,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=219, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-11-22 21:49:13,469 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-22 21:49:13,469 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 219 flow [2024-11-22 21:49:13,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:13,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:13,470 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:13,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:49:13,673 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,SelfDestructingSolverStorable12 [2024-11-22 21:49:13,674 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:13,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash 279846285, now seen corresponding path program 2 times [2024-11-22 21:49:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:13,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548702629] [2024-11-22 21:49:13,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:13,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:13,689 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:13,690 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:49:13,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:13,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548702629] [2024-11-22 21:49:13,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548702629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:13,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446405945] [2024-11-22 21:49:13,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:13,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:13,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:13,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:13,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:49:13,944 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:13,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:13,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:49:13,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:14,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:14,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-22 21:49:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:14,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446405945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:14,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:14,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-22 21:49:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387869802] [2024-11-22 21:49:14,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:14,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:49:14,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:49:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:49:14,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-11-22 21:49:14,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 219 flow. Second operand has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:14,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-11-22 21:49:14,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:15,217 INFO L124 PetriNetUnfolderBase]: 692/1322 cut-off events. [2024-11-22 21:49:15,218 INFO L125 PetriNetUnfolderBase]: For 279/289 co-relation queries the response was YES. [2024-11-22 21:49:15,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1322 events. 692/1322 cut-off events. For 279/289 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7665 event pairs, 220 based on Foata normal form. 72/1285 useless extension candidates. Maximal degree in co-relation 2176. Up to 280 conditions per place. [2024-11-22 21:49:15,224 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 82 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-11-22 21:49:15,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 103 transitions, 546 flow [2024-11-22 21:49:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:49:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:49:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 309 transitions. [2024-11-22 21:49:15,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44847605224963716 [2024-11-22 21:49:15,226 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 219 flow. Second operand 13 states and 309 transitions. [2024-11-22 21:49:15,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 103 transitions, 546 flow [2024-11-22 21:49:15,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:15,229 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 236 flow [2024-11-22 21:49:15,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=236, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-11-22 21:49:15,230 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2024-11-22 21:49:15,230 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 236 flow [2024-11-22 21:49:15,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:15,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:15,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:15,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:49:15,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:15,432 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:15,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:15,433 INFO L85 PathProgramCache]: Analyzing trace with hash 304723119, now seen corresponding path program 1 times [2024-11-22 21:49:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:15,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447686391] [2024-11-22 21:49:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:15,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447686391] [2024-11-22 21:49:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447686391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:15,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:49:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683017551] [2024-11-22 21:49:15,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:15,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:49:15,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-22 21:49:15,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:15,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:15,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-22 21:49:15,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:15,638 INFO L124 PetriNetUnfolderBase]: 518/1052 cut-off events. [2024-11-22 21:49:15,638 INFO L125 PetriNetUnfolderBase]: For 652/668 co-relation queries the response was YES. [2024-11-22 21:49:15,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 1052 events. 518/1052 cut-off events. For 652/668 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6051 event pairs, 140 based on Foata normal form. 32/980 useless extension candidates. Maximal degree in co-relation 1783. Up to 565 conditions per place. [2024-11-22 21:49:15,644 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-11-22 21:49:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 59 transitions, 363 flow [2024-11-22 21:49:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-22 21:49:15,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-11-22 21:49:15,645 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 236 flow. Second operand 4 states and 118 transitions. [2024-11-22 21:49:15,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 59 transitions, 363 flow [2024-11-22 21:49:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 328 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-22 21:49:15,648 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 205 flow [2024-11-22 21:49:15,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-11-22 21:49:15,649 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-11-22 21:49:15,650 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 205 flow [2024-11-22 21:49:15,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:15,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:15,650 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] [2024-11-22 21:49:15,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:49:15,650 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:15,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash -80658713, now seen corresponding path program 1 times [2024-11-22 21:49:15,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:15,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181136769] [2024-11-22 21:49:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:49:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:15,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181136769] [2024-11-22 21:49:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181136769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:15,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:49:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440437442] [2024-11-22 21:49:15,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:15,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:49:15,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:49:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:49:15,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-22 21:49:15,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:15,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:15,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-22 21:49:15,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:15,839 INFO L124 PetriNetUnfolderBase]: 561/1192 cut-off events. [2024-11-22 21:49:15,839 INFO L125 PetriNetUnfolderBase]: For 607/623 co-relation queries the response was YES. [2024-11-22 21:49:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2724 conditions, 1192 events. 561/1192 cut-off events. For 607/623 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7326 event pairs, 261 based on Foata normal form. 6/1076 useless extension candidates. Maximal degree in co-relation 2078. Up to 614 conditions per place. [2024-11-22 21:49:15,844 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 50 selfloop transitions, 2 changer transitions 3/64 dead transitions. [2024-11-22 21:49:15,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 377 flow [2024-11-22 21:49:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:49:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:49:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-22 21:49:15,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-11-22 21:49:15,846 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 205 flow. Second operand 3 states and 100 transitions. [2024-11-22 21:49:15,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 377 flow [2024-11-22 21:49:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:15,847 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 201 flow [2024-11-22 21:49:15,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-11-22 21:49:15,848 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-11-22 21:49:15,848 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 201 flow [2024-11-22 21:49:15,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:15,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:15,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:15,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 21:49:15,849 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:15,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1032067254, now seen corresponding path program 1 times [2024-11-22 21:49:15,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:15,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238050148] [2024-11-22 21:49:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:49:15,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238050148] [2024-11-22 21:49:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238050148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:15,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:49:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977044899] [2024-11-22 21:49:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:15,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:49:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:49:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:49:15,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-22 21:49:15,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:15,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:15,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-22 21:49:15,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:15,999 INFO L124 PetriNetUnfolderBase]: 474/993 cut-off events. [2024-11-22 21:49:16,000 INFO L125 PetriNetUnfolderBase]: For 443/463 co-relation queries the response was YES. [2024-11-22 21:49:16,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 993 events. 474/993 cut-off events. For 443/463 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5604 event pairs, 197 based on Foata normal form. 23/938 useless extension candidates. Maximal degree in co-relation 2362. Up to 628 conditions per place. [2024-11-22 21:49:16,005 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 46 selfloop transitions, 2 changer transitions 6/63 dead transitions. [2024-11-22 21:49:16,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 364 flow [2024-11-22 21:49:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:49:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:49:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-22 21:49:16,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-11-22 21:49:16,006 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 201 flow. Second operand 3 states and 99 transitions. [2024-11-22 21:49:16,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 364 flow [2024-11-22 21:49:16,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:49:16,008 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 213 flow [2024-11-22 21:49:16,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2024-11-22 21:49:16,008 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-11-22 21:49:16,008 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 213 flow [2024-11-22 21:49:16,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:16,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:16,009 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:16,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:49:16,009 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:49:16,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1677011227, now seen corresponding path program 1 times [2024-11-22 21:49:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:16,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904093316] [2024-11-22 21:49:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:16,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:16,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904093316] [2024-11-22 21:49:16,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904093316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:16,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372597696] [2024-11-22 21:49:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:16,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:16,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:16,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:16,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:49:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:16,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 21:49:16,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:16,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:16,956 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-22 21:49:16,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-11-22 21:49:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:16,984 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:31,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:31,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 150 [2024-11-22 21:49:31,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:31,725 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 44 treesize of output 40 [2024-11-22 21:49:31,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:31,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 231 treesize of output 247 [2024-11-22 21:49:32,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:32,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 75 [2024-11-22 21:49:32,915 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 32 treesize of output 30 [2024-11-22 21:49:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:32,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372597696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:32,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:32,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2024-11-22 21:49:32,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115477023] [2024-11-22 21:49:32,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:32,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 21:49:32,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:32,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 21:49:32,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=562, Unknown=3, NotChecked=0, Total=702 [2024-11-22 21:49:36,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:49:41,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:49:45,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:49:49,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:49:53,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:49:57,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:01,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:05,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:09,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:13,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:17,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:21,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:25,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:50:25,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2024-11-22 21:50:25,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 213 flow. Second operand has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:25,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:25,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2024-11-22 21:50:25,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:27,338 INFO L124 PetriNetUnfolderBase]: 2550/4390 cut-off events. [2024-11-22 21:50:27,339 INFO L125 PetriNetUnfolderBase]: For 2217/2217 co-relation queries the response was YES. [2024-11-22 21:50:27,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11255 conditions, 4390 events. 2550/4390 cut-off events. For 2217/2217 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 25492 event pairs, 44 based on Foata normal form. 3/3879 useless extension candidates. Maximal degree in co-relation 8274. Up to 733 conditions per place. [2024-11-22 21:50:27,358 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 236 selfloop transitions, 44 changer transitions 99/382 dead transitions. [2024-11-22 21:50:27,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 382 transitions, 2172 flow [2024-11-22 21:50:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-22 21:50:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-22 21:50:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 553 transitions. [2024-11-22 21:50:27,362 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2675374939525883 [2024-11-22 21:50:27,363 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 213 flow. Second operand 39 states and 553 transitions. [2024-11-22 21:50:27,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 382 transitions, 2172 flow [2024-11-22 21:50:27,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 382 transitions, 2099 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-11-22 21:50:27,374 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 585 flow [2024-11-22 21:50:27,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=585, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2024-11-22 21:50:27,375 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-11-22 21:50:27,375 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 585 flow [2024-11-22 21:50:27,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:27,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:27,375 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:27,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:50:27,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:27,579 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:50:27,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2140899510, now seen corresponding path program 2 times [2024-11-22 21:50:27,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:27,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351406560] [2024-11-22 21:50:27,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:27,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:27,612 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:50:27,612 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:50:27,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:27,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351406560] [2024-11-22 21:50:27,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351406560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:27,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:27,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:50:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123301070] [2024-11-22 21:50:27,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:27,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:50:27,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:50:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:50:27,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-22 21:50:27,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 585 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:27,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:27,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-22 21:50:27,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:27,976 INFO L124 PetriNetUnfolderBase]: 1167/2515 cut-off events. [2024-11-22 21:50:27,976 INFO L125 PetriNetUnfolderBase]: For 5171/5199 co-relation queries the response was YES. [2024-11-22 21:50:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8281 conditions, 2515 events. 1167/2515 cut-off events. For 5171/5199 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15883 event pairs, 259 based on Foata normal form. 54/2532 useless extension candidates. Maximal degree in co-relation 8239. Up to 700 conditions per place. [2024-11-22 21:50:27,992 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 89 selfloop transitions, 19 changer transitions 8/131 dead transitions. [2024-11-22 21:50:27,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 131 transitions, 1016 flow [2024-11-22 21:50:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:50:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:50:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-22 21:50:27,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6509433962264151 [2024-11-22 21:50:27,997 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 585 flow. Second operand 4 states and 138 transitions. [2024-11-22 21:50:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 131 transitions, 1016 flow [2024-11-22 21:50:28,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 131 transitions, 953 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-11-22 21:50:28,012 INFO L231 Difference]: Finished difference. Result has 105 places, 89 transitions, 593 flow [2024-11-22 21:50:28,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=593, PETRI_PLACES=105, PETRI_TRANSITIONS=89} [2024-11-22 21:50:28,013 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-11-22 21:50:28,013 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 89 transitions, 593 flow [2024-11-22 21:50:28,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:28,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:28,014 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:28,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:50:28,014 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:50:28,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash -461150415, now seen corresponding path program 1 times [2024-11-22 21:50:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:28,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808925963] [2024-11-22 21:50:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:28,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 21:50:28,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:28,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808925963] [2024-11-22 21:50:28,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808925963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:28,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:28,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:50:28,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959668067] [2024-11-22 21:50:28,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:28,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:50:28,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:50:28,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:50:28,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-22 21:50:28,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 89 transitions, 593 flow. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 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) [2024-11-22 21:50:28,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:28,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-22 21:50:28,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:28,481 INFO L124 PetriNetUnfolderBase]: 894/1845 cut-off events. [2024-11-22 21:50:28,481 INFO L125 PetriNetUnfolderBase]: For 3633/3665 co-relation queries the response was YES. [2024-11-22 21:50:28,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6074 conditions, 1845 events. 894/1845 cut-off events. For 3633/3665 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9650 event pairs, 279 based on Foata normal form. 14/1851 useless extension candidates. Maximal degree in co-relation 5581. Up to 1448 conditions per place. [2024-11-22 21:50:28,490 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 63 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-11-22 21:50:28,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 90 transitions, 695 flow [2024-11-22 21:50:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:50:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:50:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-11-22 21:50:28,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-22 21:50:28,491 INFO L175 Difference]: Start difference. First operand has 105 places, 89 transitions, 593 flow. Second operand 6 states and 162 transitions. [2024-11-22 21:50:28,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 90 transitions, 695 flow [2024-11-22 21:50:28,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 90 transitions, 645 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-11-22 21:50:28,496 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 523 flow [2024-11-22 21:50:28,497 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=523, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2024-11-22 21:50:28,497 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2024-11-22 21:50:28,497 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 523 flow [2024-11-22 21:50:28,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 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) [2024-11-22 21:50:28,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:28,497 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:28,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:50:28,497 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:50:28,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash -20693813, now seen corresponding path program 3 times [2024-11-22 21:50:28,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:28,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752323297] [2024-11-22 21:50:28,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:50:28,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:28,524 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:50:28,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 21:50:28,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752323297] [2024-11-22 21:50:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752323297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069562601] [2024-11-22 21:50:28,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:50:28,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:28,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:28,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:50:28,829 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:50:28,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:28,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:50:28,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:29,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:29,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069562601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:29,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:29,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-22 21:50:29,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685861076] [2024-11-22 21:50:29,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:29,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:50:29,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:50:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:50:29,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-22 21:50:29,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 523 flow. Second operand has 18 states, 18 states have (on average 25.27777777777778) internal successors, (455), 18 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:29,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:29,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-22 21:50:29,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:29,668 INFO L124 PetriNetUnfolderBase]: 756/1702 cut-off events. [2024-11-22 21:50:29,668 INFO L125 PetriNetUnfolderBase]: For 2737/2779 co-relation queries the response was YES. [2024-11-22 21:50:29,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5202 conditions, 1702 events. 756/1702 cut-off events. For 2737/2779 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9545 event pairs, 233 based on Foata normal form. 38/1710 useless extension candidates. Maximal degree in co-relation 3906. Up to 1015 conditions per place. [2024-11-22 21:50:29,676 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 44 selfloop transitions, 12 changer transitions 46/114 dead transitions. [2024-11-22 21:50:29,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 114 transitions, 854 flow [2024-11-22 21:50:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:50:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:50:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-11-22 21:50:29,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303983228511531 [2024-11-22 21:50:29,678 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 523 flow. Second operand 9 states and 253 transitions. [2024-11-22 21:50:29,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 114 transitions, 854 flow [2024-11-22 21:50:29,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 834 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-22 21:50:29,683 INFO L231 Difference]: Finished difference. Result has 106 places, 65 transitions, 404 flow [2024-11-22 21:50:29,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=404, PETRI_PLACES=106, PETRI_TRANSITIONS=65} [2024-11-22 21:50:29,683 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-11-22 21:50:29,683 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 65 transitions, 404 flow [2024-11-22 21:50:29,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.27777777777778) internal successors, (455), 18 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:29,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:29,684 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:29,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:50:29,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:50:29,884 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:50:29,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:29,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1561300187, now seen corresponding path program 4 times [2024-11-22 21:50:29,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:29,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36047827] [2024-11-22 21:50:29,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:50:29,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:29,927 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:50:29,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:30,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36047827] [2024-11-22 21:50:30,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36047827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517934878] [2024-11-22 21:50:30,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:50:30,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:30,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:30,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:50:30,960 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:50:30,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:30,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-22 21:50:30,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:31,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-22 21:50:31,083 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:50:31,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:50:31,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:50:31,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:50:32,305 INFO L349 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2024-11-22 21:50:32,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 30 [2024-11-22 21:50:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:32,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:34,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:50:34,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2024-11-22 21:50:34,657 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 21:50:34,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 65 [2024-11-22 21:50:34,703 INFO L349 Elim1Store]: treesize reduction 8, result has 89.0 percent of original size [2024-11-22 21:50:34,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 104 [2024-11-22 21:50:34,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:50:34,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 69 [2024-11-22 21:50:34,818 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-22 21:50:34,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 110 [2024-11-22 21:50:34,957 INFO L349 Elim1Store]: treesize reduction 8, result has 95.3 percent of original size [2024-11-22 21:50:34,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 215 [2024-11-22 21:50:35,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:50:35,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 79 [2024-11-22 21:50:35,894 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-22 21:50:35,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 133 [2024-11-22 21:50:36,011 INFO L349 Elim1Store]: treesize reduction 8, result has 95.2 percent of original size [2024-11-22 21:50:36,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 205 [2024-11-22 21:50:37,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:50:37,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 126 [2024-11-22 21:50:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:50:37,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517934878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:37,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:37,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 53 [2024-11-22 21:50:37,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538894578] [2024-11-22 21:50:37,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:37,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-22 21:50:37,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-22 21:50:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2442, Unknown=7, NotChecked=0, Total=2862 [2024-11-22 21:50:40,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 53 [2024-11-22 21:50:40,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 65 transitions, 404 flow. Second operand has 54 states, 54 states have (on average 7.2407407407407405) internal successors, (391), 54 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:40,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:40,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 53 [2024-11-22 21:50:40,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand