./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-ring.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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:49:05,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:49:05,278 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:49:05,284 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:49:05,286 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:49:05,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:49:05,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:49:05,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:49:05,314 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:49:05,315 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:49:05,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:49:05,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:49:05,317 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:49:05,318 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:49:05,319 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:49:05,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:49:05,319 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:49:05,319 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:49:05,320 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:49:05,320 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:49:05,320 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:49:05,321 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:49:05,322 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:49:05,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:49:05,322 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:49:05,323 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:49:05,323 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:49:05,323 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:49:05,323 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:49:05,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:49:05,324 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:49:05,324 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:49:05,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:49:05,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:49:05,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:49:05,325 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:49:05,325 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:49:05,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:49:05,326 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:49:05,326 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:49:05,326 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:49:05,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:49:05,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-11-19 09:49:05,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:49:05,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:49:05,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:49:05,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:49:05,646 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:49:05,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-19 09:49:07,004 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:49:07,202 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:49:07,203 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-19 09:49:07,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926a2ff61/65d6830031494127a9277916527970a6/FLAG434fdbf2e [2024-11-19 09:49:07,573 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926a2ff61/65d6830031494127a9277916527970a6 [2024-11-19 09:49:07,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:49:07,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:49:07,578 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:49:07,578 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:49:07,584 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:49:07,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:07,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b39e65e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07, skipping insertion in model container [2024-11-19 09:49:07,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:07,613 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:49:07,827 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:49:07,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:49:07,838 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:49:07,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:49:07,888 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:49:07,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07 WrapperNode [2024-11-19 09:49:07,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:49:07,891 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:49:07,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:49:07,891 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:49:07,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:07,913 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:07,957 INFO L138 Inliner]: procedures = 24, calls = 47, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 314 [2024-11-19 09:49:07,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:49:07,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:49:07,959 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:49:07,959 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:49:07,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:07,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:07,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,017 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-19 09:49:08,018 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,019 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,031 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:49:08,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:49:08,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:49:08,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:49:08,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (1/1) ... [2024-11-19 09:49:08,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:49:08,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:08,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:49:08,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:49:08,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:49:08,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:49:08,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:49:08,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:49:08,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:49:08,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:49:08,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:49:08,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:49:08,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:49:08,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:49:08,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:49:08,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:49:08,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:49:08,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:49:08,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:49:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:49:08,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:49:08,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:49:08,143 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:49:08,287 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:49:08,293 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:49:08,854 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:49:08,854 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:49:09,223 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:49:09,224 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-19 09:49:09,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:49:09 BoogieIcfgContainer [2024-11-19 09:49:09,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:49:09,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:49:09,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:49:09,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:49:09,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:49:07" (1/3) ... [2024-11-19 09:49:09,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b63adf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:49:09, skipping insertion in model container [2024-11-19 09:49:09,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:07" (2/3) ... [2024-11-19 09:49:09,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b63adf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:49:09, skipping insertion in model container [2024-11-19 09:49:09,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:49:09" (3/3) ... [2024-11-19 09:49:09,234 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-11-19 09:49:09,252 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:49:09,253 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-19 09:49:09,253 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:49:09,336 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:49:09,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 167 flow [2024-11-19 09:49:09,415 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2024-11-19 09:49:09,415 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:49:09,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 70 events. 8/70 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 179 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-11-19 09:49:09,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 167 flow [2024-11-19 09:49:09,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 156 flow [2024-11-19 09:49:09,435 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:49:09,442 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;@7d2b5698, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:49:09,443 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-19 09:49:09,447 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:49:09,447 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:49:09,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:49:09,448 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:09,448 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:49:09,449 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:09,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:09,455 INFO L85 PathProgramCache]: Analyzing trace with hash 944471, now seen corresponding path program 1 times [2024-11-19 09:49:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472734290] [2024-11-19 09:49:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:09,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:09,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472734290] [2024-11-19 09:49:09,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472734290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:09,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:09,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:49:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257463207] [2024-11-19 09:49:09,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:09,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:09,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:09,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:09,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:09,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:09,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:09,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:11,067 INFO L124 PetriNetUnfolderBase]: 5811/9209 cut-off events. [2024-11-19 09:49:11,068 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-11-19 09:49:11,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17453 conditions, 9209 events. 5811/9209 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63097 event pairs, 5236 based on Foata normal form. 514/6076 useless extension candidates. Maximal degree in co-relation 16841. Up to 7878 conditions per place. [2024-11-19 09:49:11,146 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2024-11-19 09:49:11,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 240 flow [2024-11-19 09:49:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-19 09:49:11,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2024-11-19 09:49:11,161 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 156 flow. Second operand 3 states and 106 transitions. [2024-11-19 09:49:11,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 240 flow [2024-11-19 09:49:11,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 228 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:49:11,173 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2024-11-19 09:49:11,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-11-19 09:49:11,180 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2024-11-19 09:49:11,180 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2024-11-19 09:49:11,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:11,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:11,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:49:11,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:49:11,182 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:11,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 944472, now seen corresponding path program 1 times [2024-11-19 09:49:11,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:11,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28130357] [2024-11-19 09:49:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:11,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28130357] [2024-11-19 09:49:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28130357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:11,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276738842] [2024-11-19 09:49:11,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:11,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:11,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:11,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:11,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:11,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:11,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:11,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:12,579 INFO L124 PetriNetUnfolderBase]: 5812/9212 cut-off events. [2024-11-19 09:49:12,579 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-19 09:49:12,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17240 conditions, 9212 events. 5812/9212 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63115 event pairs, 5236 based on Foata normal form. 0/5562 useless extension candidates. Maximal degree in co-relation 17203. Up to 7891 conditions per place. [2024-11-19 09:49:12,648 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-11-19 09:49:12,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 250 flow [2024-11-19 09:49:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-11-19 09:49:12,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2024-11-19 09:49:12,653 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 4 states and 124 transitions. [2024-11-19 09:49:12,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 250 flow [2024-11-19 09:49:12,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:12,657 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 157 flow [2024-11-19 09:49:12,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-11-19 09:49:12,658 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2024-11-19 09:49:12,659 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 157 flow [2024-11-19 09:49:12,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:12,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:12,660 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:49:12,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:49:12,660 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:12,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 29280847, now seen corresponding path program 1 times [2024-11-19 09:49:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881211666] [2024-11-19 09:49:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881211666] [2024-11-19 09:49:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881211666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:12,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201716354] [2024-11-19 09:49:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:12,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:12,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:12,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:12,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:12,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:12,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:13,941 INFO L124 PetriNetUnfolderBase]: 5813/9215 cut-off events. [2024-11-19 09:49:13,943 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-19 09:49:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17257 conditions, 9215 events. 5813/9215 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63116 event pairs, 5236 based on Foata normal form. 0/5564 useless extension candidates. Maximal degree in co-relation 17232. Up to 7890 conditions per place. [2024-11-19 09:49:14,006 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 51 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-19 09:49:14,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 279 flow [2024-11-19 09:49:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-19 09:49:14,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39452054794520547 [2024-11-19 09:49:14,010 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 157 flow. Second operand 5 states and 144 transitions. [2024-11-19 09:49:14,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 279 flow [2024-11-19 09:49:14,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:14,013 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 191 flow [2024-11-19 09:49:14,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-11-19 09:49:14,015 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-11-19 09:49:14,015 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 191 flow [2024-11-19 09:49:14,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:14,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:14,016 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:49:14,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:49:14,017 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:14,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:14,018 INFO L85 PathProgramCache]: Analyzing trace with hash 907668153, now seen corresponding path program 1 times [2024-11-19 09:49:14,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:14,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807333481] [2024-11-19 09:49:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:14,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:14,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807333481] [2024-11-19 09:49:14,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807333481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:14,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44515196] [2024-11-19 09:49:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:14,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:14,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:14,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:14,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:49:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:14,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:49:14,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:14,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:49:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:14,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:14,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44515196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:14,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:14,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:49:14,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361754859] [2024-11-19 09:49:14,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:14,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:49:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:49:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:49:14,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:14,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 191 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:14,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:14,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:14,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:16,043 INFO L124 PetriNetUnfolderBase]: 5814/9217 cut-off events. [2024-11-19 09:49:16,043 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-19 09:49:16,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17280 conditions, 9217 events. 5814/9217 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63148 event pairs, 5236 based on Foata normal form. 0/5569 useless extension candidates. Maximal degree in co-relation 17242. Up to 7891 conditions per place. [2024-11-19 09:49:16,092 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 50 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-11-19 09:49:16,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 322 flow [2024-11-19 09:49:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:49:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:49:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-11-19 09:49:16,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3339041095890411 [2024-11-19 09:49:16,098 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 191 flow. Second operand 8 states and 195 transitions. [2024-11-19 09:49:16,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 322 flow [2024-11-19 09:49:16,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:16,101 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 221 flow [2024-11-19 09:49:16,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=221, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-11-19 09:49:16,103 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-19 09:49:16,103 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 221 flow [2024-11-19 09:49:16,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:16,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:16,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:49:16,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:49:16,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:16,305 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:16,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash 907707653, now seen corresponding path program 1 times [2024-11-19 09:49:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140750007] [2024-11-19 09:49:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:16,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:16,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140750007] [2024-11-19 09:49:16,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140750007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:16,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:16,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:16,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022278737] [2024-11-19 09:49:16,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:16,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:16,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:16,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:16,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:16,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:16,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:16,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:16,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:16,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:17,300 INFO L124 PetriNetUnfolderBase]: 5815/9220 cut-off events. [2024-11-19 09:49:17,300 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-19 09:49:17,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 9220 events. 5815/9220 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63161 event pairs, 5236 based on Foata normal form. 0/5571 useless extension candidates. Maximal degree in co-relation 17250. Up to 7895 conditions per place. [2024-11-19 09:49:17,371 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 54 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2024-11-19 09:49:17,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 353 flow [2024-11-19 09:49:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-19 09:49:17,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3917808219178082 [2024-11-19 09:49:17,374 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 221 flow. Second operand 5 states and 143 transitions. [2024-11-19 09:49:17,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 353 flow [2024-11-19 09:49:17,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 306 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-19 09:49:17,380 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 217 flow [2024-11-19 09:49:17,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-11-19 09:49:17,382 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-19 09:49:17,383 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 217 flow [2024-11-19 09:49:17,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:17,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:17,383 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:49:17,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:49:17,385 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:17,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:17,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1925847176, now seen corresponding path program 1 times [2024-11-19 09:49:17,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:17,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001980064] [2024-11-19 09:49:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:17,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:17,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001980064] [2024-11-19 09:49:17,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001980064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371590785] [2024-11-19 09:49:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:17,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:17,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:17,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:17,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:49:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:17,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:49:17,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:17,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:49:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:17,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:17,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371590785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:17,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:17,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:49:17,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059937356] [2024-11-19 09:49:17,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:17,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:49:17,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:17,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:49:17,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:49:18,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:18,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:18,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:18,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:18,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:19,214 INFO L124 PetriNetUnfolderBase]: 5815/9219 cut-off events. [2024-11-19 09:49:19,214 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-19 09:49:19,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17288 conditions, 9219 events. 5815/9219 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 63136 event pairs, 5236 based on Foata normal form. 0/5573 useless extension candidates. Maximal degree in co-relation 17239. Up to 7885 conditions per place. [2024-11-19 09:49:19,287 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-11-19 09:49:19,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 337 flow [2024-11-19 09:49:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:49:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:49:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-11-19 09:49:19,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34442270058708413 [2024-11-19 09:49:19,290 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 217 flow. Second operand 7 states and 176 transitions. [2024-11-19 09:49:19,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 337 flow [2024-11-19 09:49:19,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:19,292 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 236 flow [2024-11-19 09:49:19,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2024-11-19 09:49:19,293 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-11-19 09:49:19,294 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 236 flow [2024-11-19 09:49:19,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:19,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:19,294 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-19 09:49:19,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:49:19,498 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,SelfDestructingSolverStorable5 [2024-11-19 09:49:19,499 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:19,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash 428724105, now seen corresponding path program 1 times [2024-11-19 09:49:19,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:19,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525152527] [2024-11-19 09:49:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:19,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:19,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:19,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525152527] [2024-11-19 09:49:19,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525152527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:19,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038301695] [2024-11-19 09:49:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:19,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:19,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:19,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:19,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:49:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:19,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:49:19,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:19,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:49:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:20,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038301695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:20,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:20,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:49:20,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201982347] [2024-11-19 09:49:20,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:20,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:49:20,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:49:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:49:20,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:20,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 236 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:20,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:20,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:20,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:21,390 INFO L124 PetriNetUnfolderBase]: 5815/9218 cut-off events. [2024-11-19 09:49:21,390 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-19 09:49:21,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 9218 events. 5815/9218 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 63189 event pairs, 5236 based on Foata normal form. 0/5573 useless extension candidates. Maximal degree in co-relation 17241. Up to 7885 conditions per place. [2024-11-19 09:49:21,437 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 43 selfloop transitions, 18 changer transitions 0/71 dead transitions. [2024-11-19 09:49:21,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 71 transitions, 354 flow [2024-11-19 09:49:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:49:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:49:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-11-19 09:49:21,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3424657534246575 [2024-11-19 09:49:21,439 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 236 flow. Second operand 7 states and 175 transitions. [2024-11-19 09:49:21,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 71 transitions, 354 flow [2024-11-19 09:49:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 327 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-19 09:49:21,442 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 241 flow [2024-11-19 09:49:21,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-11-19 09:49:21,443 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-11-19 09:49:21,443 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 241 flow [2024-11-19 09:49:21,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:21,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:21,444 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:21,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:49:21,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:21,647 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:21,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash 409480633, now seen corresponding path program 1 times [2024-11-19 09:49:21,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:21,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204620242] [2024-11-19 09:49:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:21,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204620242] [2024-11-19 09:49:21,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204620242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:21,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:21,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:21,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387415217] [2024-11-19 09:49:21,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:21,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:21,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:21,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:21,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:21,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:21,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:22,402 INFO L124 PetriNetUnfolderBase]: 6017/9598 cut-off events. [2024-11-19 09:49:22,402 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-19 09:49:22,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18037 conditions, 9598 events. 6017/9598 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 65354 event pairs, 5423 based on Foata normal form. 140/6048 useless extension candidates. Maximal degree in co-relation 17253. Up to 7896 conditions per place. [2024-11-19 09:49:22,474 INFO L140 encePairwiseOnDemand]: 57/73 looper letters, 82 selfloop transitions, 7 changer transitions 1/100 dead transitions. [2024-11-19 09:49:22,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 528 flow [2024-11-19 09:49:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-11-19 09:49:22,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-19 09:49:22,476 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 241 flow. Second operand 5 states and 190 transitions. [2024-11-19 09:49:22,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 528 flow [2024-11-19 09:49:22,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 470 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-19 09:49:22,481 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 270 flow [2024-11-19 09:49:22,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-11-19 09:49:22,482 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-11-19 09:49:22,482 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 270 flow [2024-11-19 09:49:22,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:22,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:22,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:22,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:49:22,483 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:22,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1209310984, now seen corresponding path program 1 times [2024-11-19 09:49:22,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:22,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131576982] [2024-11-19 09:49:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:22,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131576982] [2024-11-19 09:49:22,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131576982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:22,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:22,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825187909] [2024-11-19 09:49:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:22,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:22,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:22,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:22,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:22,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:22,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:23,051 INFO L124 PetriNetUnfolderBase]: 4591/7317 cut-off events. [2024-11-19 09:49:23,051 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-11-19 09:49:23,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14879 conditions, 7317 events. 4591/7317 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47248 event pairs, 4099 based on Foata normal form. 0/4764 useless extension candidates. Maximal degree in co-relation 14122. Up to 6256 conditions per place. [2024-11-19 09:49:23,074 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 55 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-19 09:49:23,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 382 flow [2024-11-19 09:49:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-11-19 09:49:23,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36712328767123287 [2024-11-19 09:49:23,075 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 270 flow. Second operand 5 states and 134 transitions. [2024-11-19 09:49:23,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 382 flow [2024-11-19 09:49:23,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:23,078 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 267 flow [2024-11-19 09:49:23,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-19 09:49:23,078 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-19 09:49:23,079 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 267 flow [2024-11-19 09:49:23,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:23,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:23,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:23,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:49:23,079 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:23,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1209310983, now seen corresponding path program 1 times [2024-11-19 09:49:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:23,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146913010] [2024-11-19 09:49:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146913010] [2024-11-19 09:49:23,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146913010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567718855] [2024-11-19 09:49:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:23,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:23,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:23,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:23,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:49:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:23,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:49:23,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:23,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:49:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:49:23,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:49:23,492 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:49:23,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:49:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:49:23,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:49:23,515 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:49:23,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:49:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:23,534 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:49:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567718855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:23,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:49:23,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-19 09:49:23,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133278802] [2024-11-19 09:49:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:23,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:49:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:49:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:49:23,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:23,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:23,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:23,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:23,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:23,910 INFO L124 PetriNetUnfolderBase]: 3361/5408 cut-off events. [2024-11-19 09:49:23,910 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2024-11-19 09:49:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10647 conditions, 5408 events. 3361/5408 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32670 event pairs, 2963 based on Foata normal form. 0/3834 useless extension candidates. Maximal degree in co-relation 9842. Up to 4610 conditions per place. [2024-11-19 09:49:23,930 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 55 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-11-19 09:49:23,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 373 flow [2024-11-19 09:49:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-19 09:49:23,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3904109589041096 [2024-11-19 09:49:23,932 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 267 flow. Second operand 4 states and 114 transitions. [2024-11-19 09:49:23,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 373 flow [2024-11-19 09:49:23,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:23,934 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 252 flow [2024-11-19 09:49:23,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-11-19 09:49:23,935 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2024-11-19 09:49:23,935 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 252 flow [2024-11-19 09:49:23,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:23,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:23,936 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:23,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:49:24,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:24,137 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:24,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:24,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1166066191, now seen corresponding path program 1 times [2024-11-19 09:49:24,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:24,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847208864] [2024-11-19 09:49:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:24,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:24,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847208864] [2024-11-19 09:49:24,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847208864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:24,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:24,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686848030] [2024-11-19 09:49:24,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:24,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:24,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:24,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:24,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:24,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:24,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:24,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:24,559 INFO L124 PetriNetUnfolderBase]: 4121/6672 cut-off events. [2024-11-19 09:49:24,560 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2024-11-19 09:49:24,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13372 conditions, 6672 events. 4121/6672 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41789 event pairs, 1846 based on Foata normal form. 114/4805 useless extension candidates. Maximal degree in co-relation 12233. Up to 3446 conditions per place. [2024-11-19 09:49:24,585 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 77 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-11-19 09:49:24,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 458 flow [2024-11-19 09:49:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-19 09:49:24,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753424657534246 [2024-11-19 09:49:24,586 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 252 flow. Second operand 3 states and 126 transitions. [2024-11-19 09:49:24,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 458 flow [2024-11-19 09:49:24,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:24,588 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 263 flow [2024-11-19 09:49:24,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-11-19 09:49:24,589 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-19 09:49:24,589 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 263 flow [2024-11-19 09:49:24,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:24,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:24,590 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:24,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:49:24,590 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:24,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1326810422, now seen corresponding path program 1 times [2024-11-19 09:49:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130368436] [2024-11-19 09:49:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:24,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:24,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130368436] [2024-11-19 09:49:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130368436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:24,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:24,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:24,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124730296] [2024-11-19 09:49:24,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:24,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:24,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:24,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:24,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:24,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:24,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:24,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:24,987 INFO L124 PetriNetUnfolderBase]: 3232/5161 cut-off events. [2024-11-19 09:49:24,987 INFO L125 PetriNetUnfolderBase]: For 791/791 co-relation queries the response was YES. [2024-11-19 09:49:24,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11077 conditions, 5161 events. 3232/5161 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30650 event pairs, 1349 based on Foata normal form. 71/3804 useless extension candidates. Maximal degree in co-relation 10777. Up to 4054 conditions per place. [2024-11-19 09:49:25,009 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 67 selfloop transitions, 2 changer transitions 5/84 dead transitions. [2024-11-19 09:49:25,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 447 flow [2024-11-19 09:49:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-11-19 09:49:25,010 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2024-11-19 09:49:25,010 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 263 flow. Second operand 3 states and 120 transitions. [2024-11-19 09:49:25,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 447 flow [2024-11-19 09:49:25,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:25,013 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 238 flow [2024-11-19 09:49:25,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2024-11-19 09:49:25,013 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-19 09:49:25,013 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 238 flow [2024-11-19 09:49:25,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:25,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:25,014 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:25,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:49:25,014 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:25,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1760590007, now seen corresponding path program 1 times [2024-11-19 09:49:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424131223] [2024-11-19 09:49:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:25,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:25,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424131223] [2024-11-19 09:49:25,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424131223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:25,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:25,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440587587] [2024-11-19 09:49:25,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:25,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:25,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:25,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:25,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:25,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:25,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:25,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:25,409 INFO L124 PetriNetUnfolderBase]: 2197/3548 cut-off events. [2024-11-19 09:49:25,409 INFO L125 PetriNetUnfolderBase]: For 700/705 co-relation queries the response was YES. [2024-11-19 09:49:25,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8156 conditions, 3548 events. 2197/3548 cut-off events. For 700/705 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20592 event pairs, 1219 based on Foata normal form. 15/2693 useless extension candidates. Maximal degree in co-relation 8111. Up to 3137 conditions per place. [2024-11-19 09:49:25,422 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 63 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2024-11-19 09:49:25,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 396 flow [2024-11-19 09:49:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-19 09:49:25,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-19 09:49:25,423 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 238 flow. Second operand 3 states and 114 transitions. [2024-11-19 09:49:25,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 396 flow [2024-11-19 09:49:25,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 386 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:25,427 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 251 flow [2024-11-19 09:49:25,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-19 09:49:25,427 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-11-19 09:49:25,428 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 251 flow [2024-11-19 09:49:25,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:25,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:25,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:25,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:49:25,428 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:25,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1726459373, now seen corresponding path program 1 times [2024-11-19 09:49:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:25,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819327066] [2024-11-19 09:49:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:25,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:25,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819327066] [2024-11-19 09:49:25,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819327066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:25,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:25,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:25,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324047463] [2024-11-19 09:49:25,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:25,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:25,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:25,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:25,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:25,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:25,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:25,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:25,820 INFO L124 PetriNetUnfolderBase]: 2336/3863 cut-off events. [2024-11-19 09:49:25,820 INFO L125 PetriNetUnfolderBase]: For 1518/1518 co-relation queries the response was YES. [2024-11-19 09:49:25,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9242 conditions, 3863 events. 2336/3863 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22815 event pairs, 1929 based on Foata normal form. 40/3015 useless extension candidates. Maximal degree in co-relation 9196. Up to 3243 conditions per place. [2024-11-19 09:49:25,835 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 54 selfloop transitions, 3 changer transitions 22/89 dead transitions. [2024-11-19 09:49:25,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 481 flow [2024-11-19 09:49:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-11-19 09:49:25,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4657534246575342 [2024-11-19 09:49:25,836 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 251 flow. Second operand 5 states and 170 transitions. [2024-11-19 09:49:25,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 481 flow [2024-11-19 09:49:25,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 460 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:25,839 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 249 flow [2024-11-19 09:49:25,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-11-19 09:49:25,840 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-11-19 09:49:25,840 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 249 flow [2024-11-19 09:49:25,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:25,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:25,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:25,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:49:25,841 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:25,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1046662206, now seen corresponding path program 1 times [2024-11-19 09:49:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:25,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387835653] [2024-11-19 09:49:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:25,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:25,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:25,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387835653] [2024-11-19 09:49:25,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387835653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:25,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:25,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:25,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186922658] [2024-11-19 09:49:25,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:25,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:25,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:25,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:25,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2024-11-19 09:49:25,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:25,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:25,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:26,209 INFO L124 PetriNetUnfolderBase]: 1554/2585 cut-off events. [2024-11-19 09:49:26,209 INFO L125 PetriNetUnfolderBase]: For 761/761 co-relation queries the response was YES. [2024-11-19 09:49:26,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6071 conditions, 2585 events. 1554/2585 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 14688 event pairs, 1234 based on Foata normal form. 0/2146 useless extension candidates. Maximal degree in co-relation 6022. Up to 2293 conditions per place. [2024-11-19 09:49:26,219 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-11-19 09:49:26,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 351 flow [2024-11-19 09:49:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-19 09:49:26,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3506849315068493 [2024-11-19 09:49:26,220 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 249 flow. Second operand 5 states and 128 transitions. [2024-11-19 09:49:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 351 flow [2024-11-19 09:49:26,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 65 transitions, 340 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:26,222 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 238 flow [2024-11-19 09:49:26,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2024-11-19 09:49:26,223 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-19 09:49:26,223 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 238 flow [2024-11-19 09:49:26,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2024-11-19 09:49:26,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:26,223 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:26,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:49:26,224 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:26,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1046662205, now seen corresponding path program 1 times [2024-11-19 09:49:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:26,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053119204] [2024-11-19 09:49:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:26,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053119204] [2024-11-19 09:49:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053119204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:26,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795844668] [2024-11-19 09:49:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:26,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:26,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:26,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:26,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:49:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:26,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:49:26,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:26,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:49:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:49:26,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:49:26,644 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:49:26,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:49:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:26,696 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:49:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795844668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:49:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-19 09:49:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585633863] [2024-11-19 09:49:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:26,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:49:26,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:26,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:26,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:26,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:26,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:26,918 INFO L124 PetriNetUnfolderBase]: 1022/1763 cut-off events. [2024-11-19 09:49:26,919 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-11-19 09:49:26,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 1763 events. 1022/1763 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9743 event pairs, 779 based on Foata normal form. 146/1663 useless extension candidates. Maximal degree in co-relation 3944. Up to 1522 conditions per place. [2024-11-19 09:49:26,925 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 50 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-11-19 09:49:26,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 338 flow [2024-11-19 09:49:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-19 09:49:26,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3732876712328767 [2024-11-19 09:49:26,927 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 238 flow. Second operand 4 states and 109 transitions. [2024-11-19 09:49:26,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 338 flow [2024-11-19 09:49:26,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:26,929 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 232 flow [2024-11-19 09:49:26,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2024-11-19 09:49:26,929 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-19 09:49:26,929 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 232 flow [2024-11-19 09:49:26,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:26,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:26,930 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] [2024-11-19 09:49:26,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:49:27,130 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,SelfDestructingSolverStorable15 [2024-11-19 09:49:27,131 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:27,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1435455118, now seen corresponding path program 1 times [2024-11-19 09:49:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780504001] [2024-11-19 09:49:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:27,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780504001] [2024-11-19 09:49:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780504001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639960782] [2024-11-19 09:49:27,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:27,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:27,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:27,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:27,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:27,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:27,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:27,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:27,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:27,466 INFO L124 PetriNetUnfolderBase]: 1301/2348 cut-off events. [2024-11-19 09:49:27,466 INFO L125 PetriNetUnfolderBase]: For 580/580 co-relation queries the response was YES. [2024-11-19 09:49:27,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5225 conditions, 2348 events. 1301/2348 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13719 event pairs, 1032 based on Foata normal form. 44/2112 useless extension candidates. Maximal degree in co-relation 5176. Up to 1533 conditions per place. [2024-11-19 09:49:27,474 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 50 selfloop transitions, 2 changer transitions 21/83 dead transitions. [2024-11-19 09:49:27,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 435 flow [2024-11-19 09:49:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-19 09:49:27,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2024-11-19 09:49:27,475 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 232 flow. Second operand 4 states and 144 transitions. [2024-11-19 09:49:27,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 435 flow [2024-11-19 09:49:27,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:27,477 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 232 flow [2024-11-19 09:49:27,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2024-11-19 09:49:27,477 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-19 09:49:27,477 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 232 flow [2024-11-19 09:49:27,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:27,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:27,478 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] [2024-11-19 09:49:27,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:49:27,478 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:27,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2002134126, now seen corresponding path program 1 times [2024-11-19 09:49:27,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:27,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247445032] [2024-11-19 09:49:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:27,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247445032] [2024-11-19 09:49:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247445032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:27,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630838875] [2024-11-19 09:49:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:27,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:27,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:27,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:27,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:49:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:27,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:49:27,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:27,966 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:49:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630838875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:27,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:49:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-19 09:49:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454612707] [2024-11-19 09:49:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:27,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:27,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:49:27,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:27,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:27,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:27,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:27,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:28,167 INFO L124 PetriNetUnfolderBase]: 794/1431 cut-off events. [2024-11-19 09:49:28,167 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2024-11-19 09:49:28,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3294 conditions, 1431 events. 794/1431 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7686 event pairs, 602 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 3246. Up to 1191 conditions per place. [2024-11-19 09:49:28,172 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-19 09:49:28,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 60 transitions, 324 flow [2024-11-19 09:49:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-11-19 09:49:28,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4075342465753425 [2024-11-19 09:49:28,173 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 232 flow. Second operand 4 states and 119 transitions. [2024-11-19 09:49:28,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 60 transitions, 324 flow [2024-11-19 09:49:28,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 60 transitions, 318 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:28,175 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 222 flow [2024-11-19 09:49:28,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-11-19 09:49:28,176 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-19 09:49:28,176 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 222 flow [2024-11-19 09:49:28,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:28,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:28,177 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] [2024-11-19 09:49:28,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:49:28,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:49:28,378 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:28,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2002134125, now seen corresponding path program 1 times [2024-11-19 09:49:28,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:28,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151389185] [2024-11-19 09:49:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:28,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151389185] [2024-11-19 09:49:28,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151389185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:28,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136292906] [2024-11-19 09:49:28,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:28,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:28,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:28,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:28,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:28,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:28,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:28,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:28,614 INFO L124 PetriNetUnfolderBase]: 597/1142 cut-off events. [2024-11-19 09:49:28,615 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2024-11-19 09:49:28,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2522 conditions, 1142 events. 597/1142 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5995 event pairs, 451 based on Foata normal form. 62/1116 useless extension candidates. Maximal degree in co-relation 2475. Up to 908 conditions per place. [2024-11-19 09:49:28,620 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 46 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-19 09:49:28,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 58 transitions, 312 flow [2024-11-19 09:49:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-19 09:49:28,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3595890410958904 [2024-11-19 09:49:28,622 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 222 flow. Second operand 4 states and 105 transitions. [2024-11-19 09:49:28,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 58 transitions, 312 flow [2024-11-19 09:49:28,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 58 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:28,624 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 217 flow [2024-11-19 09:49:28,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-11-19 09:49:28,624 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2024-11-19 09:49:28,625 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 217 flow [2024-11-19 09:49:28,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:28,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:28,625 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:28,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:49:28,625 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:28,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:28,626 INFO L85 PathProgramCache]: Analyzing trace with hash 355496843, now seen corresponding path program 1 times [2024-11-19 09:49:28,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:28,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406436473] [2024-11-19 09:49:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:28,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:49:28,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:28,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406436473] [2024-11-19 09:49:28,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406436473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:28,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:28,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:28,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883454302] [2024-11-19 09:49:28,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:28,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:28,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:28,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:28,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:28,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:28,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:28,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:28,852 INFO L124 PetriNetUnfolderBase]: 780/1410 cut-off events. [2024-11-19 09:49:28,852 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2024-11-19 09:49:28,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3187 conditions, 1410 events. 780/1410 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7569 event pairs, 385 based on Foata normal form. 1/1334 useless extension candidates. Maximal degree in co-relation 3139. Up to 763 conditions per place. [2024-11-19 09:49:28,858 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 54 selfloop transitions, 2 changer transitions 6/72 dead transitions. [2024-11-19 09:49:28,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 382 flow [2024-11-19 09:49:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-19 09:49:28,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114155251141552 [2024-11-19 09:49:28,860 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 217 flow. Second operand 3 states and 112 transitions. [2024-11-19 09:49:28,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 382 flow [2024-11-19 09:49:28,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:28,862 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 222 flow [2024-11-19 09:49:28,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-11-19 09:49:28,863 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-19 09:49:28,863 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 222 flow [2024-11-19 09:49:28,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:28,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:28,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:28,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:49:28,864 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:28,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1299118255, now seen corresponding path program 1 times [2024-11-19 09:49:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482627542] [2024-11-19 09:49:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482627542] [2024-11-19 09:49:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482627542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300799903] [2024-11-19 09:49:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:29,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:49:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:29,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 09:49:29,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:29,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:29,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-19 09:49:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:29,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300799903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:29,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:29,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-19 09:49:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047777865] [2024-11-19 09:49:29,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:29,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:49:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:29,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:49:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:49:29,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:29,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 222 flow. Second operand has 18 states, 18 states have (on average 24.72222222222222) internal successors, (445), 18 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:29,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:29,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:29,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:30,040 INFO L124 PetriNetUnfolderBase]: 772/1369 cut-off events. [2024-11-19 09:49:30,040 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-19 09:49:30,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 1369 events. 772/1369 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7039 event pairs, 380 based on Foata normal form. 36/1330 useless extension candidates. Maximal degree in co-relation 2000. Up to 649 conditions per place. [2024-11-19 09:49:30,045 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 40 selfloop transitions, 14 changer transitions 46/110 dead transitions. [2024-11-19 09:49:30,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 583 flow [2024-11-19 09:49:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:49:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:49:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 311 transitions. [2024-11-19 09:49:30,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38729763387297633 [2024-11-19 09:49:30,047 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 222 flow. Second operand 11 states and 311 transitions. [2024-11-19 09:49:30,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 583 flow [2024-11-19 09:49:30,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 578 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:30,050 INFO L231 Difference]: Finished difference. Result has 85 places, 57 transitions, 249 flow [2024-11-19 09:49:30,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=249, PETRI_PLACES=85, PETRI_TRANSITIONS=57} [2024-11-19 09:49:30,050 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2024-11-19 09:49:30,050 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 57 transitions, 249 flow [2024-11-19 09:49:30,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.72222222222222) internal successors, (445), 18 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:30,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:30,051 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:30,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:49:30,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:30,252 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:30,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash 358105602, now seen corresponding path program 2 times [2024-11-19 09:49:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:30,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498676114] [2024-11-19 09:49:30,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:30,303 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:49:30,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:30,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:30,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498676114] [2024-11-19 09:49:30,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498676114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:30,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032545716] [2024-11-19 09:49:30,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:30,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:30,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:30,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:30,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:49:30,863 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:49:30,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:30,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:49:30,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:31,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:31,943 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:49:31,944 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:49:31,950 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:49:31,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 15 [2024-11-19 09:49:31,986 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 21 treesize of output 17 [2024-11-19 09:49:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:32,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032545716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:32,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:32,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-19 09:49:32,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79969939] [2024-11-19 09:49:32,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:32,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:49:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:49:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:49:32,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-19 09:49:32,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 57 transitions, 249 flow. Second operand has 26 states, 26 states have (on average 22.0) internal successors, (572), 26 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:32,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:32,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-19 09:49:32,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:35,380 INFO L124 PetriNetUnfolderBase]: 5391/8494 cut-off events. [2024-11-19 09:49:35,380 INFO L125 PetriNetUnfolderBase]: For 4914/4938 co-relation queries the response was YES. [2024-11-19 09:49:35,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20939 conditions, 8494 events. 5391/8494 cut-off events. For 4914/4938 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 56175 event pairs, 311 based on Foata normal form. 264/8215 useless extension candidates. Maximal degree in co-relation 16278. Up to 1188 conditions per place. [2024-11-19 09:49:35,415 INFO L140 encePairwiseOnDemand]: 58/73 looper letters, 276 selfloop transitions, 55 changer transitions 39/378 dead transitions. [2024-11-19 09:49:35,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 378 transitions, 2051 flow [2024-11-19 09:49:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-19 09:49:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-19 09:49:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 902 transitions. [2024-11-19 09:49:35,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41187214611872147 [2024-11-19 09:49:35,419 INFO L175 Difference]: Start difference. First operand has 85 places, 57 transitions, 249 flow. Second operand 30 states and 902 transitions. [2024-11-19 09:49:35,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 378 transitions, 2051 flow [2024-11-19 09:49:35,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 378 transitions, 1947 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-11-19 09:49:35,430 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 628 flow [2024-11-19 09:49:35,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=628, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2024-11-19 09:49:35,431 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2024-11-19 09:49:35,431 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 628 flow [2024-11-19 09:49:35,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 22.0) internal successors, (572), 26 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:35,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:35,431 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:35,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:49:35,632 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,SelfDestructingSolverStorable21 [2024-11-19 09:49:35,632 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:35,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1205791234, now seen corresponding path program 3 times [2024-11-19 09:49:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:35,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670066592] [2024-11-19 09:49:35,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:49:35,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:35,688 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:49:35,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:49:35,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:35,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670066592] [2024-11-19 09:49:35,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670066592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:35,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391845694] [2024-11-19 09:49:35,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:49:35,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:35,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:35,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:35,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:49:36,112 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:49:36,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:36,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:49:36,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:36,140 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 5 treesize of output 3 [2024-11-19 09:49:36,143 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 10 treesize of output 8 [2024-11-19 09:49:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:49:36,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:36,231 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:49:36,231 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 24 treesize of output 11 [2024-11-19 09:49:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:49:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391845694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:36,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:36,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-19 09:49:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391486769] [2024-11-19 09:49:36,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:36,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:49:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:49:36,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:49:36,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-19 09:49:36,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 628 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:36,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:36,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-19 09:49:36,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:36,930 INFO L124 PetriNetUnfolderBase]: 4247/6904 cut-off events. [2024-11-19 09:49:36,930 INFO L125 PetriNetUnfolderBase]: For 6499/6523 co-relation queries the response was YES. [2024-11-19 09:49:36,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18682 conditions, 6904 events. 4247/6904 cut-off events. For 6499/6523 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45678 event pairs, 729 based on Foata normal form. 62/6826 useless extension candidates. Maximal degree in co-relation 12953. Up to 3890 conditions per place. [2024-11-19 09:49:36,962 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 133 selfloop transitions, 27 changer transitions 1/169 dead transitions. [2024-11-19 09:49:36,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 169 transitions, 1182 flow [2024-11-19 09:49:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:49:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:49:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-11-19 09:49:36,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4360730593607306 [2024-11-19 09:49:36,964 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 628 flow. Second operand 6 states and 191 transitions. [2024-11-19 09:49:36,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 169 transitions, 1182 flow [2024-11-19 09:49:36,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 169 transitions, 1100 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:36,970 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 691 flow [2024-11-19 09:49:36,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=691, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2024-11-19 09:49:36,971 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 40 predicate places. [2024-11-19 09:49:36,971 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 691 flow [2024-11-19 09:49:36,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:36,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:36,971 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:36,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:49:37,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:37,172 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:37,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1907950809, now seen corresponding path program 1 times [2024-11-19 09:49:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962541665] [2024-11-19 09:49:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 09:49:37,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:37,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962541665] [2024-11-19 09:49:37,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962541665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:37,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:37,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:49:37,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935725770] [2024-11-19 09:49:37,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:37,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:37,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:37,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 691 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:37,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:37,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:37,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:37,628 INFO L124 PetriNetUnfolderBase]: 1828/3258 cut-off events. [2024-11-19 09:49:37,629 INFO L125 PetriNetUnfolderBase]: For 5419/5620 co-relation queries the response was YES. [2024-11-19 09:49:37,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9097 conditions, 3258 events. 1828/3258 cut-off events. For 5419/5620 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20793 event pairs, 481 based on Foata normal form. 120/3269 useless extension candidates. Maximal degree in co-relation 7734. Up to 982 conditions per place. [2024-11-19 09:49:37,649 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 97 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-11-19 09:49:37,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 917 flow [2024-11-19 09:49:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-19 09:49:37,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308219178082192 [2024-11-19 09:49:37,650 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 691 flow. Second operand 4 states and 155 transitions. [2024-11-19 09:49:37,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 917 flow [2024-11-19 09:49:37,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 875 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-19 09:49:37,658 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 638 flow [2024-11-19 09:49:37,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=638, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2024-11-19 09:49:37,658 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 29 predicate places. [2024-11-19 09:49:37,658 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 638 flow [2024-11-19 09:49:37,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:37,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:37,659 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:37,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-19 09:49:37,659 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:37,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash 352571059, now seen corresponding path program 2 times [2024-11-19 09:49:37,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:37,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475240032] [2024-11-19 09:49:37,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:37,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:37,689 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:49:37,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:49:37,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:37,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475240032] [2024-11-19 09:49:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475240032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043298145] [2024-11-19 09:49:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:37,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:37,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:37,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:37,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:49:38,038 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:49:38,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:38,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 09:49:38,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:49:38,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:49:38,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043298145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:38,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:38,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-19 09:49:38,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960538090] [2024-11-19 09:49:38,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:38,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:49:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:49:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:49:38,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:38,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 638 flow. Second operand has 18 states, 18 states have (on average 25.166666666666668) internal successors, (453), 18 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:38,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:38,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:38,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:39,231 INFO L124 PetriNetUnfolderBase]: 2771/4956 cut-off events. [2024-11-19 09:49:39,231 INFO L125 PetriNetUnfolderBase]: For 11232/11376 co-relation queries the response was YES. [2024-11-19 09:49:39,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15288 conditions, 4956 events. 2771/4956 cut-off events. For 11232/11376 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33038 event pairs, 1348 based on Foata normal form. 162/5010 useless extension candidates. Maximal degree in co-relation 12988. Up to 2500 conditions per place. [2024-11-19 09:49:39,257 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 62 selfloop transitions, 28 changer transitions 62/166 dead transitions. [2024-11-19 09:49:39,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 166 transitions, 1363 flow [2024-11-19 09:49:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:49:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:49:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 303 transitions. [2024-11-19 09:49:39,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37733499377334995 [2024-11-19 09:49:39,259 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 638 flow. Second operand 11 states and 303 transitions. [2024-11-19 09:49:39,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 166 transitions, 1363 flow [2024-11-19 09:49:39,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 166 transitions, 1349 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-11-19 09:49:39,271 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 760 flow [2024-11-19 09:49:39,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=760, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2024-11-19 09:49:39,271 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 44 predicate places. [2024-11-19 09:49:39,271 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 760 flow [2024-11-19 09:49:39,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.166666666666668) internal successors, (453), 18 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:39,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:39,272 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:39,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 09:49:39,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-19 09:49:39,473 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:39,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1873108242, now seen corresponding path program 3 times [2024-11-19 09:49:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:39,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572239009] [2024-11-19 09:49:39,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:49:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:39,546 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:49:39,547 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:49:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572239009] [2024-11-19 09:49:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572239009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378914619] [2024-11-19 09:49:40,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:49:40,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:40,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:40,192 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:40,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:49:40,357 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:49:40,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:40,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:49:40,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:40,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:49:40,772 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 20 treesize of output 24 [2024-11-19 09:49:40,781 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 09:49:40,782 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 7 [2024-11-19 09:49:40,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:49:40,867 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 35 treesize of output 31 [2024-11-19 09:49:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 09:49:40,901 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:49:40,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378914619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:40,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:49:40,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-11-19 09:49:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983137297] [2024-11-19 09:49:40,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:40,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:49:40,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:40,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:49:40,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:49:41,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-19 09:49:41,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 760 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:41,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:41,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-19 09:49:41,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:41,874 INFO L124 PetriNetUnfolderBase]: 4777/7835 cut-off events. [2024-11-19 09:49:41,874 INFO L125 PetriNetUnfolderBase]: For 20633/21052 co-relation queries the response was YES. [2024-11-19 09:49:41,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24067 conditions, 7835 events. 4777/7835 cut-off events. For 20633/21052 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 49792 event pairs, 635 based on Foata normal form. 230/7741 useless extension candidates. Maximal degree in co-relation 21476. Up to 5008 conditions per place. [2024-11-19 09:49:41,931 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 135 selfloop transitions, 8 changer transitions 1/154 dead transitions. [2024-11-19 09:49:41,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 154 transitions, 1353 flow [2024-11-19 09:49:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:49:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:49:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-11-19 09:49:41,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3816046966731898 [2024-11-19 09:49:41,932 INFO L175 Difference]: Start difference. First operand has 115 places, 100 transitions, 760 flow. Second operand 7 states and 195 transitions. [2024-11-19 09:49:41,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 154 transitions, 1353 flow [2024-11-19 09:49:41,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 154 transitions, 1331 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-19 09:49:41,956 INFO L231 Difference]: Finished difference. Result has 111 places, 102 transitions, 774 flow [2024-11-19 09:49:41,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=774, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2024-11-19 09:49:41,957 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 40 predicate places. [2024-11-19 09:49:41,957 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 774 flow [2024-11-19 09:49:41,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:41,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:41,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:41,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:49:42,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 09:49:42,158 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:42,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash -79694682, now seen corresponding path program 1 times [2024-11-19 09:49:42,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:42,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358483168] [2024-11-19 09:49:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:42,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:49:42,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:42,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358483168] [2024-11-19 09:49:42,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358483168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:42,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668552749] [2024-11-19 09:49:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:42,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:42,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:42,404 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:42,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:49:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:42,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 09:49:42,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:49:42,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:49:42,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668552749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:42,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:42,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-19 09:49:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600182716] [2024-11-19 09:49:42,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:42,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:49:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:49:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:49:43,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:43,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 774 flow. Second operand has 17 states, 17 states have (on average 25.823529411764707) internal successors, (439), 17 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:43,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:43,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:43,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:43,759 INFO L124 PetriNetUnfolderBase]: 3559/6627 cut-off events. [2024-11-19 09:49:43,759 INFO L125 PetriNetUnfolderBase]: For 16462/16648 co-relation queries the response was YES. [2024-11-19 09:49:43,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21542 conditions, 6627 events. 3559/6627 cut-off events. For 16462/16648 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 48011 event pairs, 1610 based on Foata normal form. 292/6782 useless extension candidates. Maximal degree in co-relation 18676. Up to 3289 conditions per place. [2024-11-19 09:49:43,799 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 61 selfloop transitions, 32 changer transitions 56/163 dead transitions. [2024-11-19 09:49:43,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 163 transitions, 1484 flow [2024-11-19 09:49:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:49:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:49:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-11-19 09:49:43,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.395738203957382 [2024-11-19 09:49:43,800 INFO L175 Difference]: Start difference. First operand has 111 places, 102 transitions, 774 flow. Second operand 9 states and 260 transitions. [2024-11-19 09:49:43,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 163 transitions, 1484 flow [2024-11-19 09:49:43,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 163 transitions, 1467 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:43,817 INFO L231 Difference]: Finished difference. Result has 121 places, 106 transitions, 917 flow [2024-11-19 09:49:43,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=917, PETRI_PLACES=121, PETRI_TRANSITIONS=106} [2024-11-19 09:49:43,818 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 50 predicate places. [2024-11-19 09:49:43,818 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 106 transitions, 917 flow [2024-11-19 09:49:43,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.823529411764707) internal successors, (439), 17 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:43,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:43,819 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:43,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 09:49:44,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 09:49:44,024 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:44,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:44,024 INFO L85 PathProgramCache]: Analyzing trace with hash -807428910, now seen corresponding path program 2 times [2024-11-19 09:49:44,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:44,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789529519] [2024-11-19 09:49:44,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:44,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:44,065 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:49:44,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:49:44,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:44,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789529519] [2024-11-19 09:49:44,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789529519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:44,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:44,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:49:44,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823761810] [2024-11-19 09:49:44,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:44,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:44,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:44,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-19 09:49:44,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 106 transitions, 917 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:44,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:44,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-19 09:49:44,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:45,233 INFO L124 PetriNetUnfolderBase]: 4565/9007 cut-off events. [2024-11-19 09:49:45,233 INFO L125 PetriNetUnfolderBase]: For 22223/22707 co-relation queries the response was YES. [2024-11-19 09:49:45,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27254 conditions, 9007 events. 4565/9007 cut-off events. For 22223/22707 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 70956 event pairs, 1281 based on Foata normal form. 485/9379 useless extension candidates. Maximal degree in co-relation 26080. Up to 2511 conditions per place. [2024-11-19 09:49:45,277 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 148 selfloop transitions, 7 changer transitions 0/169 dead transitions. [2024-11-19 09:49:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 169 transitions, 1615 flow [2024-11-19 09:49:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-19 09:49:45,278 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-19 09:49:45,278 INFO L175 Difference]: Start difference. First operand has 121 places, 106 transitions, 917 flow. Second operand 4 states and 152 transitions. [2024-11-19 09:49:45,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 169 transitions, 1615 flow [2024-11-19 09:49:45,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1589 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-19 09:49:45,298 INFO L231 Difference]: Finished difference. Result has 118 places, 110 transitions, 960 flow [2024-11-19 09:49:45,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=960, PETRI_PLACES=118, PETRI_TRANSITIONS=110} [2024-11-19 09:49:45,299 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 47 predicate places. [2024-11-19 09:49:45,299 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 110 transitions, 960 flow [2024-11-19 09:49:45,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:45,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:45,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:45,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-19 09:49:45,300 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:49:45,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash 946178138, now seen corresponding path program 3 times [2024-11-19 09:49:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175835805] [2024-11-19 09:49:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:49:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:45,419 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 09:49:45,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:50,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:50,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175835805] [2024-11-19 09:49:50,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175835805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:50,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954485402] [2024-11-19 09:49:50,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:49:50,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:50,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:50,514 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:49:50,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:49:50,698 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 09:49:50,699 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:50,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-19 09:49:50,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:51,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:49:51,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 46 [2024-11-19 09:49:51,643 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-19 09:49:51,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 10 [2024-11-19 09:49:51,832 INFO L349 Elim1Store]: treesize reduction 9, result has 84.7 percent of original size [2024-11-19 09:49:51,833 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 58 treesize of output 67 [2024-11-19 09:49:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:49:52,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:53,362 INFO L349 Elim1Store]: treesize reduction 8, result has 96.8 percent of original size [2024-11-19 09:49:53,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 79 treesize of output 267 [2024-11-19 09:49:53,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:49:53,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 49 [2024-11-19 09:49:53,452 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-19 09:49:53,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 13 [2024-11-19 09:50:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:50:20,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954485402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:20,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:20,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 13] total 51 [2024-11-19 09:50:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347543018] [2024-11-19 09:50:20,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:20,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-19 09:50:20,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-19 09:50:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2378, Unknown=0, NotChecked=0, Total=2550 [2024-11-19 09:50:24,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 73 [2024-11-19 09:50:24,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 110 transitions, 960 flow. Second operand has 51 states, 51 states have (on average 16.431372549019606) internal successors, (838), 51 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:24,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:24,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 73 [2024-11-19 09:50:24,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand